Best Frequency Counters in 2026

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

GUARANTEE. You have a 2-year warranty on the product. You can also contact us afterwards if problems arise, we will come up with a solution in all cases. We are always available for online support for questions. If you are not satisfied with the product, you can return it within 30 days and get your money back immediately.

EASY INSTALLATION. This counting device is plug & play. Easy to place near a door and comes with mounting material. The system is completely wireless and battery operated. (BATTERIES NOT INCLUDED)

BI-DIRECTIONAL. This smart visitor counter counts in both directions and shows the counts separately on the display. Easily reset the counter to zero by sliding the supplied magnet on the counter with display.

1. This product can be used to test the frequency of walkie-talkies, which is very suitable for DCS and CTCSS testing. The measurement range is wide between 50MHz-2.4GHz.

2. Powered by a 9V battery, one button operation, long press the button to select the frequency step, at the same time equipped with an antenna, can directly measure the frequency, easy to use.

3. There are two frequencies to choose from, 1K and 0.1K respectively.

DROK digital counter is widely used in counting of output, the flow, the times, the speed and other occasion which need counting.

The electronic counter has two counting modes: Voltage input mode & No voltage input mode, suitable for various situation.

The hand tally counter has 6 digits digital display and super wide counting range (0-999999), long detecting distance (30cm) ideal for large traffic counting.

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: 30CM .

Product wiring: please refer to my picture; The picture show. Picture 5

Particle mass & particle counter in a single handheld unit.

Six mass ranges and eight particle sizes.

User K-factors setting for special particulate with different densities.

Use 8 bit Microchip PIC16F648A,up to 1.1GHz

DC input: DC 9V ~ 12V

The backlight is enabled: ¡Ü 55 mA backlight disabling: ¡Ü 55 mA

Power supply:12-24VDC

Count Range: 0-999999

UP plus pulse meter

Digital counter is widely used in counting of output, the flow, the times, the speed and other occasion which need counting

Power supply: AC100V-240V ;Display range:0-999999(The meter retain the number automatically when power cut off)；Overall dimension: 57mm X 40mm X 85mm

Photoelectric switch sensor is widely used in outdoors gates, garage doors for indoor/outdoor usage etc.

Frequency Counter: PLJ-8LED is a frequency display component of 8-bit digital tube display. It is mainly used for the display of frequency values of transceiver and other equipment, and can also be used for conventional frequency measurement.

RF Frequency Meter: With Microchip's PIC16F648A, 2.4 GHz frequency meter. Using temperature-compensated voltage controlled crystal oscillator (2.5 ppm VC-TCXO).

Features: This frequency meter has Unique gate control and precise time algorithm (non-timed interrupt). Gate (display refresh) time 0.01 seconds / 0.1 seconds / 1.0 seconds, real-time display frequency value.

You can use the universal USB 5V interface power supply, can also use an external DC power supply or 9V battery.

The number of components is small, all straight-line components, installation and commissioning simple.

Addition and subtraction frequency settings for the measurement of radio transceivers and other equipment.

Revolution counter is a recorder specializing in measuring the length or the various machinery revolving.

Rotating needle, handle, accord with humanization design, use more convenient and quick.

Digital display window, make the display more accurate.

Material: PCB + FR4

Display: Digital 0802 LCD

Note: Accuracy can only be adjusted to the second digit of the decimal point, less than one-tenth of the precision

4 digit bright LED light, clear to read.

Good stability, high accuracy, and easy installation.

Counting value will be retained when power failure.

★Portable mini money counter, with only counting function,compact design, easy to use and easy to carry.Equipped with a suitcase,it is convenient for you to carry it with you,which is very suitable for places such as banks,shops,etc.that require a number of points, as well as going out to work.

★This money counting machine is suitable for most banknotes in the world and is a good tool for small-value banknote counting.This money counter only counts the number of banknotes,not the sum of currencies.

★Efficient and reliable banknote counting speed,this money counter machine can count 600 banknotes in one minute,which greatly improves your work efficiency.Made of high-quality plastic and hardware,this money counter is durable and has a long lifespan.

♣With Microchip's PIC16F648A, 2.4 GHz frequency meter.

♣Using temperature-compensated voltage controlled crystal oscillator (2.5 ppm VC-TCXO).

♣Unique gate control and precise time algorithm (non-timed interrupt).

【OPTICAL SENSOR】Temtop’s laser light scatter technology offers uniquely broad particle size detection. The all-new PMD331 has an ultra-low detection limit, down to 0.1-micron particle size with a unit detection range of 0 to 3,000,000 CF. The continuous flow optical sensor is coupled with purge air to ensure accurate measurements in a wide range of environments without performance degradation.

【ADJUSTABLE INTERVAL TIME】User-adjustable sample times include 3-60 second intervals which facilitates environmental profiling in various applications. Ideal for both long-term sampling, a large display offers ease in viewing from across the room.Supports RS232 communication interface.

【USER-FRIENDLY】7-buttons enable easy access to menu-driven setup and sampling. The PMD331 offers selectable sample modes of TC/CF/L and alphanumeric location IDs, giving the user the ability to identify a unique name to a location or sampling area. This dust monitor can store up to 2,000,000 sample records which are easily accessed on-screen or downloaded to a computer with the included utility software.

Power supply:DC12V/DC24V

Hall sensor:Pusle signal,NPN 3 wires normally closed

Counting:Plus or minus

PARAMETERS: Infrared sensor, sensitive, sensing distance 2.62FT, red led digital display, font height 4in, 6-digit digital display, count up to 999999,110V-240V power supply, with remote control (no battery in the package)

HOW TO COUNT? Aim the sensor at an item. When an item passes in front of the sensor during movement, the number on the display will increase 1. Make sure that no other item interferes with the sensor.

REMOTE CONTROL COUNTING: Use the remote control to increase or decrease the value on the display screen (change it by 1 each time). You can also adjust the initial count value, for example, you can count from 50 instead of always starting from 0.

APPLICATION: It is an ideal counting equipment for production base, packaging base and logistics sorting base, and can also be used for counting demand of some major events.

USE: Remote control counting and sensor counting. Remote control counting is manual counting, which is generally used in schools, golf courses, etc. Sensor counting is automatic counting, fixed the sensor on both sides of the conveyor belt, and the production quantity is automatically counted.

MAXIMUM 999999: Count up to 999999, for some games and parking lot is very convenient.

Frequency Counter Frequency Meter 11Bit/Sec 10MHz OCXO

12.4 GHz PLUS