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Best Frequency Counters & Pulse Generators - Buying Guide

Last Updated: 03/24/2019

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Bestselling Frequency Counters & Pulse Generators on Amazon

  1. DROK 0.56"Red LED Display Digital Tally Counter 0-9999 Up Down Counter Totalizer Electronic Counter ...
  2. Icstation Digital 2 Channal PWM Square Wave Pulse Signal Generator Adjustable Frequency Duty Cycle 1...
  3. Inkbird Digital Tact Switch Preset Scale Counter Register Twin Timer Relay Time Delay (IDT-E2RH Timer)
  4. B&K Precision 1823A Universal Frequency Counter with Ratio Function, 2.4 GHz
  5. TWTADE/Infrared Wireless Visitor Counter 110-220VAC LED Auto Display Digital Counter 0-999999 6 Digi...
  6. PWM Frequency Meter, Yeeco 1Hz-150KHz 0-100% Adjustable PWM Square Wave Pulse Signal Generator 3.3-3...
  7. DIGITEN 110V-240V 6-Digit 0-999999 LED Display Digital UP Counter+Hall NPN Proximity sensor switch+holder
  8. Frequency Tester Frequency Meter DIY Kit 1Hz - 50MHz Crystal Oscillator Digital LED + Housing DIY
  9. DIGITEN 12V 4 Digit Red Counter Meter+Infrared Proximity Photoelectric Switch Sensor NPN
  10. TWTADE/ 110-220VAC LED Auto Display Digital Counter 0-999999 6 Digits + Hall Proximity Sensor Switch...

  #1

DROK 0.56"Red LED Display Digital Tally Counter 0-9999 Up Down Counter Totalizer Electronic Counter with Magnetic Induction Switch DC5V

Model: 100262   |    Mpn: 100262   |    Ean: 0533593041230   |    PartNumber: 100262   |   Asin: B00LSGG4XC

Technical parameters: Input pulse signal: open NPN / PNP collector contact switches, non-contact switch, limit switch, level pulse and so on. Input signal voltage: High level H = 4 ~ 30V, low level L = 0 ~ 0.6V, falling edge trigger Measuring range: 0 to 9999 cumulative count Count input frequency: less than 2000Hz Display: 0.56"high brightness LED Power supply: DC 5V 10%; 80mA Working temperature: -10 ~ 60 c (relative humidity of 80% or less) Dimensions: 79 x 43 x 25mm Mounting Hole Size: 75 x 39.5mm Using: Move the magnet close to the magnetic proximity switch about 0.5-1 cm, then take the magnet away from the magnetic proximity switch for a certain distance (typically 3-5 cm or more). Then the product start counting and screen display add 1 per repeated movement. The counter should works on recurring machine, such as counting the up and down movement of punch, counting the circles of flywheel. Note: 1, the count signal and reset signal input switching should closer to the counter terminal. 2, to avoid unnecessary interference, if necessary, please use shielded cable, shield connected to the count terminal "+". 3, recommended to use magnetic switch.

Features

  • Accurate digital counter with 0.56" LED display, magnetic induction switch.
  • Need seperate power, input DC5V, input current is less than 80mA, has a long service life.
  • Meassuring range is 0 to 9999, count input frequency id less than 2000Hz
  • Input signal voltage, High level H = 4 ~ 30V, low level L = 0 ~ 0.6V, falling edge trigger.
  • NPN/PNP open collector, contact switch, switch, limit switch, pulse of electrical level.
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Brand: DROK   |   Manufacturer: DROK

Item Dimensions: 1.69 x 0.98 x 3.11 inches (4.3 x 2.5 x 7.9 cm)   |   Package Dimensions: 1.9 x 4.9 x 5.9 inches (4.8 x 12.4 x 15.0 cm)

First Available: 2017-05-15

Amazon Price: $14.07 | as of 03/24/2019(9:47am pst)
Availibility: Usually ships in 24 hours
List Price: $14.07

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  #2

Icstation Digital 2 Channal PWM Square Wave Pulse Signal Generator Adjustable Frequency Duty Cycle 100% 1Hz-150KHz

Model: 2 Channel Sqaure Wave Pulse Generator   |    Mpn: 966801   |    PartNumber: 966801   |   Asin: B01MA1M7Y9

Icstation mini digital square waveform generator module supporting 1Hz-150KHz frequency and 0%-100% duty cycle adjustment through the on-board momentary push button and also support external seial communication. DC 5V-30V wide voltage input and dual channel complementary output with red LED display the parameter ideal as the square wave source for instrument testing or driving the stepper motor and so on.

Specifications:
Frequency Range: 1Hz-150KHz
Duty Cycle Range: 0%-100%
Accuracy: 2%
Working Voltage: DC 5-30V
Output Current: 8-30mA
Output Amplitude: 5V V-PP (default, changed by external power supply)
Module Size: 41*29 mm / 1.61*1.14 inch (L*W)

Package Included:
1X Digital 2 Channel Square Wave Pulse Signal Generator Module 1Hz-150KHz 0%-100%

Display Instructions:
There are 3 display range:
1:XXXX->the unit is 1Hz, range is 1Hz-999Hz
2.XX.X->the unit is 0.1KHz,range is 0.1KHz-99.9KHz
3.X.X.X.->the unit is 1KHz, range is 1KHz-150KHz
e.g.:100->100Hz;54.1->54.1KHz;1.2.4.->12KHz

Setting Instructions:
1. Short press"Set" to interchange display the 4 values(FR1:PWM1 frequency;dU1:PWM1 duty cycle;FR2:PWM2 frequency;dU2:PWM2 duty cycle)
2. press"Up" and "Down" to set the current value

Serial Control:
Baud Rage: 9600pbs; Date Bit: 8; Stop Bit: 1;
1. Set the PWM frequency: "S1FXXXT": set the PWM1 frequency as XXX HZ(0001-999); "S1FXX.XT": set the PWM1 frequency as XXX KHZ(00.1-99.9); "S1FX.X.X.T": set the PWM1 frequency as XXX KHZ(0.0.1.-1.5.0.)(S1->PWM1; s2->PWM2; F->frequency; D->duty cycle; T->Stop bit)
2.Set the PWM duty cycle: "S1DXXXT": set the PWM1 duty cycle as XXX(001-100); "S2DXXXT": set the PWM2 duty cycle as XXX(001-100)
3.DOWN: set successful; FALL: set fail.

Features

  • Digital square waveform generator module support 1Hz-150KHz frequency and 0%-100% duty cycle adjusting independently through the on-board momentary push button
  • Dual channel fequency signal and duty cycle complementary output, easier to control
  • DC5-30V wide voltage input(support micro USB 5V input),3 digit LED display the parameter easy to read, serial communication interface easy to connect and controlled by MCU
  • Used as square wave source for instrument testing,driving the stepper motor, PWM control the motor speed / LED light brightness
  • 1, Fulfilled by Amazon usually spend 2-4 days to delivery, and fulfilled by seller usually delivery in around 17 days = ((( 0 ) from China, with tracking information.
    2, We provide application consulting and replace service in case you received a defective one, please rest assured to buy it.
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Brand: IS   |   Manufacturer: Icstation

Package Dimensions: 0.16 x 1.3 x 2.76 inches (0.4 x 3.3 x 7.0 cm)

Amazon Price: $5.45 | as of 03/24/2019(9:47am pst)
Availibility: Usually ships in 24 hours
List Price: $9.99

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  #3

Inkbird Digital Tact Switch Preset Scale Counter Register Twin Timer Relay Time Delay (IDT-E2RH Timer)

Model: CECOMINOD004404   |    Mpn: IDT-E2RH-220   |    Ean: 7241871117777   |    PartNumber: IDT-E2RH-220   |   Asin: B008KV65MS

Features:
DIN(48X48mm) Digital counter
0.01s-99h99m time range with twin time set value individual, Output for A,B Period One shot or cycle time mode, up or down mode available
MCU for digital countrol, High accuracy and reliability
NPN and PNP input switchable
0.39" height LED, Prevent dazzle,Highly visible display
Tact switch for up or down set value, easily operate
Key lock function, Prevent mistake operation
Switching power supply and low consumption

Specification
Front Panel Dimension: DIN 48mm(W)X48mm(L)
Power Supply Voltage: AC 100-240V 50/60Hz
Operating voltage range 85 110% Rated voltage
Time Range: 0.01s-99h99m time range with twin time set value individual, Up or Down Mode, Output for A,B Period
Character: PV: 4 digital 9.9mm height Red LED Letters
SV: 4 digital 8mm height Green LED Letters
Contact Output: AC250V 3A(Resistive Load) A: NO/NC B: NO
Life expectancy of Relay: Mechanical 10,000,000 operations
Electrical 10,000,000 operations
Accuracy: 1.1% +-0.05s
Countrol Signals: >=5ms(Reset, Gate)
Control/Input Type: Contact/No-voltage input(NPN)/Voltage input(PNP)
External Power: DC12V/50mA(Max.) for sensor use only.
Reset Method: Power on/External/Manual
Cutout size: 45x45mm
Mounting Method: Flush mounting and screw terminals
Weight: Approx. 130g

Environmental Conditions: -10 55oC no icy or condensation , RH 35-85% Humidity Storage Temperature: -25 65oC no icy or condensation
IDT-E2RH has certificate of RoHS, EMC, LVD compliance
Package included:
1 x Digital timer
1 x Manual

Features

  • 0.01s-99h99m time range with twin timer set value individual
  • One shot or cycle time mode, up or down mode
  • NPN and PNP input switchable
  • Tact switch for up or down set value, easily operate
  • Output: 2 Relay
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Brand: Inkbird   |   Manufacturer: Lerway Tech

Item Dimensions: 13.58 x 33.46 x 29.53 inches (34.5 x 85.0 x 75.0 cm)   |   Package Dimensions: 2.44 x 2.48 x 5.47 inches (6.2 x 6.3 x 13.9 cm)

Amazon Price: $26.99 | as of 03/24/2019(9:47am pst)
Availibility: Usually ships in 24 hours
List Price: $26.99

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  #4

B&K Precision 1823A Universal Frequency Counter with Ratio Function, 2.4 GHz

Model: 1823A   |    Mpn: 1823A   |    Ean: 0817050182316   |    PartNumber: 1823A   |   Asin: B005J6LP72

The 1823A and 1856D are reciprocal 2.4 GHz and 3.5 GHz frequency counters that are microprocessor controlled. Their LED displays can provide up to nine digits of resolution using an external time base with a 10 s gate time. The high accuracy, sensitivity, and versatility of these counters make them an extremely valuable instrument to scientists, engineers, and communications technicians for a broad spectrum of laboratory and service applications.

Features

  • 1 PPM Time base stability
  • External frequency standard input
  • Bright LED display
  • Attenuator
  • Low pass filter
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Brand: B&K Precision   |   Manufacturer: B&K Precision Corporation

Package Dimensions: 7.5 x 12.5 x 13.8 inches (19.1 x 31.8 x 35.1 cm)

Amazon Price: $407.48 | as of 03/24/2019(9:47am pst)
Availibility:
List Price: $470.00

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  #5

TWTADE/Infrared Wireless Visitor Counter 110-220VAC LED Auto Display Digital Counter 0-999999 6 Digits Count Mall People Flow + Photoelectric Switch Sensor Distance 2m NPN NO + Reflector + Holder

 Ean: 0720643000136   |    PartNumber: JSQ+GD+FGB 2m   |   Asin: B07MV98CRH

JDM11-6H series electronic accumulative counter, adopts low power integrated circuit, high bright LED Display with clear appearance. It has power off memory without machine damage, durable enough. It is widely used to production line counting, flow counting, rotation counting, length counting, times counting and such occasions.

Features

  • Product Name: Counter Power supply: AC110-240V Display range:0-999999 The meter retain the number automatically when power cut off.
  • Product Name photoelectric switch sensor Output State : NPN NO; Detection distance: 2m .
  • Product wiring: please refer to my picture; The picture show. Picture 4
  • Overall dimension: 57mm*40mm*85mm ;Panel cutout dimension:51mm*27mm; Sensor head dimention: M18x70mm; Power lead: 1.5m(5ft), US plug.
  • Package Content: 6 Digits red counter x 1; Photoelectric sensor x 1; Reflector x 1; Power plug wire x 1; Sensor mounting holder x 1;
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Brand: TWTADE   |   Manufacturer: TWTADE

Package Dimensions: 1.9 x 4.7 x 5.6 inches (4.8 x 11.9 x 14.2 cm)

Amazon Price: $33.99 | as of 03/24/2019(9:47am pst)
Availibility: Usually ships in 24 hours
List Price: $33.99

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  #6

PWM Frequency Meter, Yeeco 1Hz-150KHz 0-100% Adjustable PWM Square Wave Pulse Signal Generator 3.3-30V 5V 12V 24V Frequency Duty Cycle Module with Protective Shell LCD Display

 Ean: 0751565001864   |    PartNumber: 1800523   |   Asin: B07KQ4NL9Q

Are you looking for a large adjustable ranged frequency duty cycle meter for your power supply? Is the PWM in the market look so thin and not heavy duty enough?
Why not try our Yeeco PWM Frequency Meter! Clear bright display with adjustable buttons, easy to adjust frequency and duty ratio.

Specification:
Item name: Yeeco PWM Frequency Meter
Rating voltage: 3.3-30V
Frequency range: 1Hz-150KHz
Signal capacity: 5-30mA output current
Output frequency: PWM frequency equals to input voltage
Working environment: -20-70

Feature:
LCD display output frequency and duty cycle with protective shell.
Large adjustable range of frequency, high accuracy.
Instruction is included in the item. If there is any question or problem, please feel free to contact us directly.

Features

  • PWM frequency generator with 3.3-30V working voltage, 5-30mA output current, and nice to work in -20-70 working environment
  • Large adjustable range of PWM frequency meter, widely adjust 4 frequency ranges within 1Hz to 150KHz, high accuracy of 2% on every frequency; Serial communication pulse generator module, SCM TTL level convenient to use
  • Clear frequency display, LCD display available to show frequency and duty cycle value; Welding and non-welding terminal from choosing, nice to connect with; Protective shell protect module from breaking or dust
  • Frequency duty ratio meter with 4 buttons for setting frequency and duty ratio, data and parameter will automatically save after setting and never lose any data when power off
  • Pulse signal generator ideal to be square wave signal generator, controlling motor driver, power supply of MCU and other adjustable PWM controlling circuit
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Brand: Yeeco   |   Manufacturer: Yeeco

Package Dimensions: 1.1 x 1.7 x 4 inches (2.8 x 4.3 x 10.2 cm)

Amazon Price: $16.49 | as of 03/24/2019(9:47am pst)
Availibility: Usually ships in 24 hours
List Price: $21.99

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  #7

DIGITEN 110V-240V 6-Digit 0-999999 LED Display Digital UP Counter+Hall NPN Proximity sensor switch+holder

 PartNumber: HMC11-6H-220-HALL   |   Asin: B01DGDHO1U

HMC11 series electronic accumulative counter, adopts low power integrated circuit, high bright LED Display with clear appearance. It has power off memory without machine damage, durable enough. It is widely used to production line counting, flow counting, rotation counting, length counting, times counting and such occasions.

Specification

Power supply: 100-240VAC
Power consumption: Approx.10W
Range: 0-999999
Counting speed: 10 times/s
Hall sensor: Pusle signal,NPN 3 wires normally closed, Lenth is 1.2m
Reset time: 0.5s
Reset method: Panel button,manual
Detection range: 10mm
Detected objects: magnet
Cutting size: 38.5x27.5mm
Working temp: 0-50C
Data storage: 10 years
Power wire length: 1.2m

Packaging list

1 x HMC-6H counter
1 x Hall sensor
1 x Sensor holder
1 x Power wire

Features

  • Power supply:AC100-240V
  • Count Range: 0-999999
  • UP plus pulse meter
  • Hall sensor: NPN NC
  • Data be retained when power failture
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Brand: DIGITEN   |   Manufacturer: DIGITEN

Item Dimensions: 33.46 x 15.75 x 22.44 inches (85.0 x 40.0 x 57.0 cm)   |   Package Dimensions: 1.8 x 4 x 5.6 inches (4.6 x 10.2 x 14.2 cm)

Amazon Price: $24.99 | as of 03/24/2019(9:47am pst)
Availibility: Usually ships in 24 hours
List Price: $24.99

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  #8

Frequency Tester Frequency Meter DIY Kit 1Hz - 50MHz Crystal Oscillator Digital LED + Housing DIY

 Ean: 0792117548772   |    PartNumber: Wal frontn7hipzgode   |   Asin: B07J1JK69M

Description:

For soldering installation precautions, please follow these steps:

- The components are soldered on the back side of the board (including the screen surface of a good resistor-capacitor microcontroller), from low to high, the first low soldering components such as crystals, capacitors, resistors, diodes.

- Solder the microcontroller connector, then solder, triode, button, power outlet.

- With diagonal pliers on the back, shorten the pin as much as possible.

Debugging steps:

1. After soldering on the IC, the microcontroller PIC16F628, pay attention to the direction of the IC, the insertion may damage the chip!
2. Check if the IC is against, if correct, please correct it in time.
3. After the check, the fourth digital tube displays 0. The installation is successful!

Steps for usage:
1. Before measuring the signal, please switch the J1 jumper cap. The blue terminal is IN for signal input and GND is for GND signal. The input signal amplitude cannot be higher than 30 V, otherwise the frequency meter may be damaged.
2. Before measuring the crystal, please switch the J1 jumper cap and insert a crystal of 4 to 40 meters in JP1 to measure the crystal frequency.

Note: This is Unassembled DIY Sets

The package includes:

1 set of x frequency meter DIY kit crystal measurement frequency measurement

Features

  • [Frequency Range]:The frequency range of this frequency meter is 1 Hz --50 MHz.
  • [Measured Signal Amplitude]:The measured signal amplitude is up to 30 V. It can measure 4-40 meters passive crystal.
  • [Programmable]:Autoranging with different gating times, optional frequency offset addition or subtraction (programmable).
  • [Very Few Components]:PIC 16F628, 5-segment LED display, 20MHz crystal and several resistors.
  • [Power Saving Mode]:Optional (configurable) power save mode, if the frequency does not change significantly within 15 seconds, it will automatically turn off the display. You can use a USB 5V or DC5-12V power supply.
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Brand: Wal front   |   Manufacturer: Wal front

Item Dimensions: 0.79 x 3.94 x 4.72 inches (2.0 x 10.0 x 12.0 cm)   |   Package Dimensions: 0.94 x 4.13 x 6.1 inches (2.4 x 10.5 x 15.5 cm)

Amazon Price: $10.49 | as of 03/24/2019(9:47am pst)
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  #9

DIGITEN 12V 4 Digit Red Counter Meter+Infrared Proximity Photoelectric Switch Sensor NPN

 Ean: 0600748801206   |    PartNumber: GDDS-02   |   Asin: B016U4J190

Features & Specifications

Power supply:DC12V
DC Current 60mA
Sign:Pusle signal
Infrared photoelectric switch sensor:NPN 3 wires normally open,NO,6-36VDC
trigger mode: rising edge
Display dimension: 0.56" RED
Reset signal:Pulse or switch
Counting:Plus or minus
Response frequency: 100HZ
Display range:0-9999
Panel cutout dimension:76.5mm*39.2mm
Overall dimension: 79mm*43mm*30.5mm
Sensor dimention: M18x70mm.
Detection distance: 10mm
Sensor cable length:1200mm
The meter retain the number automatically when power cut off.
Sensor wiring:brown---Power+; blue---Power-;black---signal.
Operating temperature: 0 to 50 C.

Packaging include

4 Digit red counter x 1
IR proximity sensor x 1
4 wires cable x 1
2 wires cable x 1
Instruction x 1

Features

  • Power supply:DC12V
  • Infrared photoelectric switch sensor:NPN 3 wires normally open,NO,6-36VDC
  • Counting:Plus or minus
  • Response frequency: 100HZ
  • The meter retain the number automatically when power cut off.
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Brand: DIGITEN   |   Manufacturer: DIGITEN

Package Dimensions: 1.4 x 4 x 4 inches (3.6 x 10.2 x 10.2 cm)

Amazon Price: $18.99 | as of 03/24/2019(9:47am pst)
Availibility: Usually ships in 24 hours
List Price: $18.99

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  #10

TWTADE/ 110-220VAC LED Auto Display Digital Counter 0-999999 6 Digits + Hall Proximity Sensor Switch Distance 10mm NPN NO + Holder

 Ean: 0720643000143   |    PartNumber: JSQ+GD+CT 10mm   |   Asin: B07MV9HYNC

JDM11-6H series electronic accumulative counter, adopts low power integrated circuit, high bright LED Display with clear appearance. It has power off memory without machine damage, durable enough. It is widely used to production line counting, flow counting, rotation counting, length counting, times counting and such occasions.

Features

  • Product Name: Counter Power supply: AC110-240V Display range:0-999999 The meter retain the number automatically when power cut off.
  • Product Name Hall sensor Output State : NPN NO; Detection distance: 10mm .
  • Product wiring: please refer to my picture; The picture show. Picture 5
  • Overall dimension: 57mm*40mm*85mm ;Panel cutout dimension:51mm*27mm; Sensor head dimention: M12x32mm; Power lead: 1.5m(5ft), US plug.
  • Package Content: 6 Digits red counter x 1; Photoelectric sensor x 1; Power plug wire x 1; Sensor mounting holder x 1;
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Brand: TWTADE   |   Manufacturer: TWTADE

Package Dimensions: 2.2 x 4.7 x 6.3 inches (5.6 x 11.9 x 16.0 cm)

Amazon Price: $24.99 | as of 03/24/2019(9:47am pst)
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List Price: $24.99

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  #11

Control Line Equipment AC-6 Pneumatic Impulse Counter

 PartNumber: AC-6   |   Asin: B06XDGTWKC

The AC-6 is a six digit totalizing counter. A pneumatic signal or impulse, exhausted to atmosphere between inputs, advances the counter one digit each time signal is present. The counter is useful for event recording, piece or part counting or cycle counting. This counter can be used in general counting applications where mechanical or electrical drives are impractical or inconvenient. It is ideal where the surrounding atmosphere prohibits the use of the other types of counting devices. The count is maintained until manually reset.

Features

  • Signal Pressure Range: 25-125 psi
  • Maximum Count Speed: 300 cpm
  • Mounting: Thru-hole base mounting - orientation is not critical
  • Reset: Manual reset knob returns display to zero
  • Weight: 14 oz
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Brand: Control Line Equipment   |   Manufacturer: Control Line Equipment

Item Dimensions: 2 x 2 x 4.5 inches (5.1 x 5.1 x 11.4 cm)   |   

Amazon Price: $156.73 | as of 03/24/2019(9:47am pst)
Availibility: Usually ships in 3-4 business days
List Price: $156.73

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  #12

Tenma 72-490 Audio Signal Generator 20 kHz

Model: 72-490   |    Mpn: 72-490   |    Ean: 0640522694105   |    PartNumber: 72-490   |   Asin: B00DRDP9KS

TENMA 72-490 SIGNAL GENERATOR, AUDIO, 20KHZ

Features

Brand: Tenma   |   Manufacturer: TENMA

Package Dimensions: 3.1 x 5.5 x 9.2 inches (7.9 x 14.0 x 23.4 cm)

Amazon Price: $83.17 | as of 03/24/2019(9:47am pst)
Availibility: Usually ships in 4-5 business days
List Price: $83.92

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  #13

15KV High Voltage Generator Boost Step-up High Power Module Inverter Arc Igniter Coil Module Disassembled Parts for DIY Use (PACK OF 2 SETS)

 Ean: 0663862534030   |    PartNumber: Walfrontxk1fo9ytgn   |   Asin: B076PJVJWV



The module is made according to the theory of Tesla coil, it's small in size and high in efficiency, the high voltage can reach about 15KV at the output, there are 2 sets in disassembled parts, very popular among electronics enthusiasts, widely used for electrical research and DIY use.

With the high voltage pulse current output and boost step-up power module, the high frequency arc has a high temperature which can easily ignited, When the circuit works, it produces a stable high frequency arc, the temperature is very high, which is easily combustible, so some people call it the plasma lighter.

It can be used as the high voltage source for high school science experiment, electronic salute, electronic instrument, negative ion generator and small scientific production.



Specifications:

Input Voltage: 3.7-4.2V

Current: 2A

Output Voltage: 15KV

Output Current: 0.4A

Arc Discharge Distance: 5-10mm/0.016-0.032inches

PCB Size: 42 32 1.6mm/1.65 1.26 0.06inches

Quantity: 2 sets



Note:

1, the paint of the enameled wire of the welding parts should be scraped and welded lightly before the welding of the transformer.

2, to ensure safety, please keep away from the old and the children while using.

Features

  • Efficiently Working--The module is made according to the theory of Tesla coil, it's small in size and high in efficiency, the high voltage can reach about 15KV at the output
  • Package of 2 Sets--There are 2 sets in disassembled parts, very popular among electronics enthusiasts, widely used for electrical research and DIY use
  • High Voltage--With the high voltage pulse current output and boost step-up power module, the high frequency arc has a high temperature which can easily ignited.
  • Widely Used-- It can be used as the high voltage source for high school science experiment, electronic salute, electronic instrument, negative ion generator and small scientific production
  • Just like the Plasma Lighter -- When the circuit works, it produces a stable high frequency arc, the temperature is very high, which is easily combustible, so some people call it the plasma lighter
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Brand: Walfront   |   Manufacturer: Walfront

Package Dimensions: 1.02 x 2.68 x 4.06 inches (2.6 x 6.8 x 10.3 cm)

Amazon Price: $6.99 | as of 03/24/2019(9:47am pst)
Availibility: Usually ships in 1-2 business days
List Price: $9.99

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  #14

Blue LED 4-Digital 0 - 9999 Up / Down Digital Counter

Model: STK0114007580   |    Mpn: STK0114007580   |    Ean: 0092145594995   |    PartNumber: STK0114007580   |   Asin: B00CBA8JF0

Features:

With high-speed IC, bright Blue LED
Easy to install
Good stability with strong anti-interference
Counting value be retained when power failure
Widely used in Automatic Burden System, Winding Machine, packaging machinery, textile machinery, etc
0000 to 9999 cycle counting
From 9999 to 0000 then always display 0000
Specifications:

Product model: GDD7949AT-P24V
Power Supply: DC5V 28V
Operating current: 30mA
input Signal: Pulse or switch
Trigger Mode: Rising edge
Display: Blue LED
Display Range: 0000 9999
Reset Signal: Pulse or switch2
Panel Cutout Dimension: Approx. 76.5 x 39.2mm
Overall Dimension: Approx. 79 x 43 x 30.5mm
Working Environment: 0 to 50 ; 85RH
Package Includes:

1 x Digital Counter
2 x Cable
1 x Manual

Features

  • With high-speed IC, bright Blue LED
  • Easy to install
  • Good stability with strong anti-interference
  • Counting value be retained when power failure
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Manufacturer: Generic

Package Dimensions: 1 x 3.2 x 3.8 inches (2.5 x 8.1 x 9.7 cm)

Amazon Price: $13.78 | as of 03/24/2019(9:47am pst)
Availibility: Usually ships in 1-2 business days
List Price: $19.29

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  #15

KKmoon Multi-functional Dual LED Display Digital Counter 90~265V AC/DC Length Meter with 2 Relay Output and Pulse PNP NPN

 Ean: 0635946565568   |    PartNumber: TJN3085467460801EZ   |   Asin: B07CMZ9M5X

This is a dual display digital counter that can be used as a industrial counter to count the quantity of objects in a single batch and the production line, and also can be used as length counter. It is widely applied in machine, light industry, electronic, food, package, leather, cloth weaving industry for counting, length, batch counting. Features: Dual 6 digits LED Display for clear reading. NPN and PNP sensor input is switchable. Includes 4 kinds of input mode, 6 kinds of output mode for option. Input and output is optional isolated. Counting Range: -199999 999999; Preset Range: 0.00001-999999. Can set alarm value for relay output. Can be connected with encoder, length counting wheel, proximity switch, photoelectric switch, optical sensor, etc. Widely applied in chemical, machine, light industry, etc. Specifications: Model: FH8-6CRRB Material: ABS Power Supply: 90~265V AC/DC Auxiliary Power: 24V DC Input: Pulse Signal: Square Wave and Sine Wave: 5V H 30V 0 L 2V up edge active Input Impedance: 10K Counting Speed: 30/5000CPS Counting Range: -199999 999999 Preset Range: 0.00001-999999 Response speed: switch type input 0~5000hz, incremental encoder input 0~2000hz Accuracy: 0.1%F.S Output: 2 Relay Contact Output Environment Temperature: 0 50 Storage Temperature: -10 60 Environment Humidity: 35 85%RH Insulation Resistance: 10M Power Consumption: 5W Contact Edge: Up edge active Item Size: 9.5 * 8.5 * 4.7cm / 3.74 * 3.35 * 1.85in Item Weight: 167g / 5.89oz Package Size: 11 * 10.1 * 5.5cm / 4.33 * 3.98 * 2.17in Package Weight: 203g / 7.16oz Package List: 1 * Counter 2 * Brackets 1 * User Manual (English)

Features

  • Dual 6 digits LED Display for clear reading.
  • NPN and PNP sensor input is switchable.
  • Includes 4 kinds of input mode, 6 kinds of output mode for option.
  • Input and output is optional isolated.
  • Counting Range: -199999 999999; Preset Range: 0.00001-999999.
  • See more on Amazon...

Brand: KKmoon   |   Manufacturer: KKmoon

Package Dimensions: 2.17 x 3.98 x 4.33 inches (5.5 x 10.1 x 11.0 cm)

Amazon Price: $36.12 | as of 03/24/2019(9:47am pst)
Availibility: Usually ships in 1-2 business days
List Price: $36.12

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  #16

GY560 Frequency Counter Tester for 2-Way Radio Transceiver 50MHz-2.4GHz 7 Digit LCD Display with Signal Meter

 Ean: 0019008607777   |    PartNumber: f58795our00287   |   Asin: B074KD4G9T

Description
The frequency counter is designed to an continually test the analog radio signal (handhold radio/wireless phone etc)and digital radio signal.
Digital display design, can clearly display the frequency parameter with the signal strength.
A necessary tool for the signal testing and radio maintenance.
Frequency step is 200K (digital radio signal), 1K, 100Hz.
Operation is the only one button with all functions.
Good present for you and your friends.
Color: show as picture.
Specifications
Battery: 9V 6F22.
Frequency step: 200K (digital radio signal), 1K, 100Hz.
Testing distance: UHF : 8m, VHF : 5m.
Testing range: 50 MHz ~ 2.4 GHz.
Antenna: pulling out antenna.
Operation: only one button with all functions.
Auto power off time: 1 mins(except for the digital signal gear).
Package Included
1* frequency counter(no battery).
1* English manual.
Note
There might be a bit color distortions due to different computer resolutions.

Features

  • Designed to an continually test the analog radio signal (handhold radio/wireless phone etc)and digital radio signal
  • Digital display design, can clearly display the frequency parameter with the signal strength
  • A necessary tool for the signal testing and radio maintenance
  • Frequency step is 200K (digital radio signal), 1K, 100Hz
  • Operation is the only one button with all functions
  • See more on Amazon...

Brand: dianpo   |   Manufacturer: dianpo

Amazon Price: $18.93 | as of 03/24/2019(9:47am pst)
Availibility: Usually ships in 1-2 business days
List Price: $18.93

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  #17

Frequency Counter, RISEPRO Digital Bench Frequency Signal Meter with AC Power Cable BNC Test Leads 10Hz - 2.4 GHz VC3165

 Ean: 0712962230905   |    PartNumber: VC3165   |   Asin: B01LWIPALE

Brief Description

This frequency counter measures signals over a wide range from 0.01 Hz to 2.4 GHz. The gate time is continuously varying from 100ms to 10s. The maximum power consumption is only 5W.

The instrument provides high performance stability and function at low cost. The counter can measure frequency, period and equal-precision. It is also featured with 3 step function selection, work state, unit and eight-digit LED display.

All functions in this frequency counter depend on a single CPU. A crystal-controlled temperature circuit provides a constant compensation for temperature change, thus reducing measurement errors typically caused by temperature drift. The Channel B (CH. B) input has an attenuator (x1, x20), AC/DC coupling for a low-pass filter.

One Set Included

1 x Frequency Counter
1 x Test probe with BNC type connector
1 x Instruction Manual
Standard Factory Package

Features

  • With 3 steps function selection: work state, unit & 8-digit LED display
  • Frequency measurement from 0.01 Hz to 2.4 GHz
  • Cyclic measuring range from 0.5 ms to 10 s
  • With attenuation of 20 dB and input impedance of 1 MO
  • With frequency, period and equal-precision measurement
  • See more on Amazon...

Brand: RISEPRO   |   Manufacturer: RISEPRO

Package Dimensions: 6.2 x 11.2 x 11.7 inches (15.7 x 28.4 x 29.7 cm)

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  #18

huaban 1Hz-50MHz Crystal Oscillator Tester Frequency Counter Tester Meter Cymometer Measurement Tester Module LED DIY Kits with Housing

 PartNumber: HXJ10002   |   Asin: B0768VMWHS

1Hz-50MHz Crystal Oscillator Tester Frequency Counter Tester Meter Cymometer Measurement Tester Module LED DIY Kits

Features

  • Product Type: Crystal Oscillator Frequency Counter
  • Frequency Range: 1Hz-50MHz
  • Power supply : USB 5V or DC 5-12V Digits
  • Resolution : Five
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Brand: HUABAN   |   Manufacturer: huaban

Package Dimensions: 1 x 3 x 4.2 inches (2.5 x 7.6 x 10.7 cm)

Amazon Price: $18.98 | as of 03/24/2019(9:47am pst)
Availibility: Usually ships in 24 hours
List Price: $18.98

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  #19

FTVOGUE Auto Digital Counter DC LED Digital Display 4 Digit 0-9999 Up/Down Plus/Minus Panel Counter Meter with Cable(Green)

 Ean: 0783335499472   |    PartNumber: FTVOGUE16h7cgukr2-03   |   Asin: B07NSM25KZ

Description:
This digital display counter has bright LED light, high accuracy, good stability, and easy installation.
The meter retains the number automatically when power off.

Specifications:
Working voltage: DC 8-24V
DC current: 30mA
Counting: Plus or minus
Counting range: 0-9999
Digit number: 4 digit
Color(Optional): Blue, Green, Red
Size: Approx. 8 x 4 x 2.5cm / 3.1 x 1.5 x 0.9inch
Weight: 48g

Wire diagram:
Terminal 1: Positive
Terminal 2: Ground
Terminal 3: Signal Ground
Terminal 4: Clear
Terminal 5: Switch Pulse Signal
Terminal 6: Blue wire for increasing
Terminal 7: Black wire for decreasing
Note: The 5-Pin cable is used to connect with the counter.

Packaging Include:
1 x Digital Display Counter
1 x 5-pin Cable

Features

  • 4 digit bright LED light, clear to read, meassuring range is 0 to 9999.
  • Good stability, strong anti-interference, high accuracy, and easy installation.
  • Counting value will be retained when power failure.
  • Wide application to automation equipment and test equipments, etc.
  • Compact size, beautiful appearance, and Blue, Green, Red, three color for you to choose.
  • See more on Amazon...

Brand: FTVOGUE   |   Manufacturer: FTVOGUE

Package Dimensions: 0.79 x 0.79 x 1.97 inches (2.0 x 2.0 x 5.0 cm)

Amazon Price: $11.99 | as of 03/24/2019(9:47am pst)
Availibility: Usually ships in 1-2 business days
List Price: $11.99

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  #20

Uxcell a12082000ux0647 H7EC-BLM 0-999999 Counting Range No-voltage Required Digital Counter

Model: a12082000ux0647   |    Mpn: a12082000ux0647   |    Ean: 0696738199378   |    PartNumber: a12082000ux0647   |   Asin: B009NC9M0U

Description: This counter requires No External Power Supply! Widely applied to various electrical calculation in different industries. The panel design with self rest locking make that operate it correctly.

Features

  • Product Name: Counter; Model: H7EC-BLM
  • Number of Digits: 6;Counting Range: 0 - 999999
  • Counter Size: 4.8 x 2.4 x 5.2cm/ 1.9 x 0.9 x 2 (L*W*T);Mounting Size: 4.4 x 2.2 x 4.2cm/1.73 x 0.86 x 1.65(L*W*Depth)
  • Color: As Picture Shown; Net Weight: 51g
  • Package Content: 1 x Counter
  • See more on Amazon...

Brand: uxcell   |   Manufacturer: uxcell

Package Dimensions: 1.1 x 1.9 x 2.8 inches (2.8 x 4.8 x 7.1 cm)

First Available: 2018-08-22

Amazon Price: $10.46 | as of 03/24/2019(9:47am pst)
Availibility: Usually ships in 1-2 business days
List Price: $10.46

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