Frequency Counters
measure frequency by comparing the signal to the counter's time base oscillator.
See Also: Universal Counters, Time Interval Counters
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110 GHz Frequency Extender, Pulsed DC Bias
N5293AX02
The N5293AX02 is a compact and broadband frequency extender with built-in pulsed bias-tee and provides 10 MHz to 110 GHz single-sweep measurements with N5292A test set controller systemized with a PNA/PNA-X B vector network analyzer.
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NI-9361, 32-Bit, 8-Channel C Series Counter Input Module
783407-01
32-Bit, 8-Channel C Series Counter Input Module - The NI‑9361 is a differential or single-ended input module. With this module, you can expand beyond the four counters in CompactDAQ to reach up to 64 counters per 8‑slot chassis. You can configure each channel to read a single pulse train or combine them to read up to four incremental encoders. You can also directly connect sensors with open-collector or push-pull outputs by using an internal switchable 1 kΩ pull‑up resistor. The NI‑9361 counters can perform encoder position and velocity measurements. You can synchronize the counters with other analog, digital, and counter measurements in your chassis.
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Universal Counter
U6220A
The Picotest U6200A also provides great features including Frequency & Ratio (11Digits/Sec.), Time interval, Period (2.5 ns to 1000s), Duty Cycle, Pulse Width, Rise/Fall Time, Peak Volts (100 Hz~300 MHz), Phase, Totalize, Temperature Stability (< 1 PPM), Aging Rate (< 2 PPM per year), timebase reference channel (Figure-2) and complete Front-End Isolation. Moreover, it offers 20 memory locations (Figure-3) for storing frequently-used operations.
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Geiger Counter
USB-RAD121
The USB-RAD121 is a radiation detector that runs completely off your computer's USB port. The device features a classic geiger counter click and light pulse for every count registered, while radiation levels are displayed on the computer. The simple RadGraph software interface displays and graphs readings over time, and even allows the readings to be streamed to a personal webpage.
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Standard 4.47 (127.00) - 12.00 (340.00) High Frequency Probe
K-50B-S
Current Rating (Amps): 6Bandwidth @ -1dB (GHz): 4.00Return Loss @ -20dB (GHz): 2.50Nominal Impedance (Ohms): 50Test Center (mil): 600Test Center (mm): 15.24Full Travel (mil): 100Full Travel (mm): 2.54Recommended Travel (mil): 90Recommended Travel (mm): 2.29Overall Length (mil): 1,205Overall Length (mm): 30.61
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Reversible Counter
RV-3150
The RV-3150 reversible counter is newly released and so helpful to measure linear displacement, angular displacement and angle dimensions in the combination with Ono RP-series rotary encoder, roller encoder, and the like, which produce two-phase 90°phase difference output signals.
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Frequency Multipliers
RF coaxial frequency multiplier (also referred to as a coaxial frequency doubler) PE8600 from Pasternack has SMA conectors and are 50 Ohm. Our SMA frequency multiplier is manufactured for a minimum frequency input of 1.5 GHz and a maximum frequency input of 5 GHz. This SMA microwave frequency multiplier / doubler output minimum frequency is 3 GHz and output maximum frequency of 10 GHz.
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Liquid Particle Counters
Provides groundbreaking capabilities for monitoring the most demanding de-ionized and ultrapure water systems.
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Mechanical Counter
SP101/102 Series
The SP-101/102 Series is a heavy duty totalizer. It has a double sided shaft for stability. Available in Revolution or Rotary type movements. Input shaft direction is choice between top going or top coming. Count speed range from 300 ~ 3000 rpm. It is a available in 4 or 5 digits with a large digit size of 6.0 x 4.0mm. Resetting of count value is done easily with the front push button reset.
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Time Interval/Frequency Counter
SR620
Stanford Research Systems, Inc.
The SR620 measures time interval, frequency, pulse-width, rise and fall time, period, phase and events. Time intervals are measured with 25 ps rms resolution, making the SR620 one of the highest resolution counters available.
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Light-to-Frequency
Light-to-Frequency (LTF) sensors convert measurements of light intensity to a digital form for direct interfacing to a microcontroller. The output of the device is a square wave or pulse stream the frequency of which is linearly proportional to the light intensity. LTF converters are designed for applications such as ambient light measurement, light absorption/reflection in products such as white goods, photographic equipment, colorimetry, chemical analyzers and display contrast controls. They may be used in any system that requires a wide dynamic range, and/or high resolution digital measurement of light intensity.
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Digital Gauge Counter
DG-5100
The DG-5100 is a high-resolution gauge counter having integrated structure. This counter achieves input frequency at 3 MHz which is high speed of ten times compared to conventional counter. (equivalent to a spindle velocity of 1.2 m/s at GS-3800B series)
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Frequency Ranges
1398A
The useable frequency range is from 5 Hz to more than 10 times higher than that listed in the table below, e.g. T2.5-1 volt and T5-2 volt can be used beyond 10 MHz.
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Active Differential Probe, 100 kHz to 12 GHz
U1818B
The Keysight U1818B 100 kHz to 12 GHz active differential probe makes it easy to perform high frequency in-circuit measurements using network, spectrum and signal source analyzers. With flat frequency response, low noise floor, and direct power from instrument connection, the U1818B allows measurements to be made while taking full advantage of Keysight's RF analyzers dynamic range.
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Software for Magnii Geiger Counters
RadGraph & RadMeter Suite
RadGraph is a comprehensive program that allows graphing readings over time, saving graphs as images and CSV data, printing graphs, analyzing radiation levels over time and also taking simple measurements.
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Frequency Multipliers
Analog Devices active and passive frequency multipliers enable designers to economically multiply lower frequencies to higher frequencies without creating measurable additive phase noise. This broad portfolio features a range of devices that can meet the size, volume, and cost needs for multiple applications, including:
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Frequency Synthesizers
A frequency synthesizer allows the designer to generate a variety of output frequencies as multiples of a single reference frequency. The main application is in generating local oscillator (LO) signals for the up- and down-conversion of RF signals.
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Up/ Down Counters
LED display timer that can be used to time various situations and events such as talent, speakers, presentations, experiments, etc. The LED display has a brightness control and the 0.8" characters are large enough to be read across a room.
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Miniature 8-channel photon counter
id150 SERIES
Intended for large-volume OEM applications, the id150-1x8 is the only multichannel solid-state single photon detector on the market. It consists of a CMOS silicon chip packaged in a standard TO8-16pin header with a transparent window cap. The chip combines 8 in-line single photon avalanche diodes that can be accessed simultaneously for parallel processing. square in center-to-center A fast active quenching circuit is integrated within each pixel in order to operate each diode in photon counting regime. The chip is mounted on a printed circuit board on top of a single-stage thermoelectric cooler (TEC). A thermistor can be used to measure the temperature of the chip. Only two low power supplies of +5V and -25V are needed for operation in photon counting mode. The fast active quenching circuit leads to a dead time of less than 50ns per channel. An outstanding timing resolution of less than 60ps allows high accuracy measurements.
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Voltage to Frequency Converters
Analog Devices has the widest range of voltage-to-frequency converters (VFCs) for the instrumentation, industrial, and automation markets. They are ideally suited for use in analog-to-digital conversion, long-term integration, linear frequency modulation and demodulation, and frequency-to-voltage conversion. ADI’s latest family of VFCs, the AD774x series, is based on Σ-Δ technology and provides high linearity in tiny packages at low cost.
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Frequency Generation & Monitoring
Timetech reference generators, phase comparators, and synchronized oscillators.
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Frequency Meter
Pointer Type
*Frequency Meters pointer type with inbuilt transducer are available in size 72 X 72, 96 X 96 mm suitable for 110V, 230V & 440V AC*Scale 45-50-55 Hz.*Model : SF-72, SF-96.
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Frequency Reference
Quartzlock time and frequency standards offer a complete range of cost effective and low noise in both atomic controlled (rubidium oscillator) and GPS controlled (off-air) time and frequency reference, calibrators and standards. These acurate time and frequency references are used in telecoms, aviation, nautical and precision test and measurement enviroments.
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Frequency Standard Products
The ES-110 generates a stable source of 10 MHz using GPS (Global Positioning System) satellites as a reference. If frequency distribution is needed, we offer the ES-210, a Quad 1x6 1/5/10 MHz Distribution Amplifier. The ES-210 provides four independent 1x6 Frequency DAs in a single rack-mount enclosure. The ES-410 is a four output version of the ES-110. The ES-410 was introduced and won Radio Magazine's Best of Show Award at the 2016 NAB Show.
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Digital Gauge Counter
DG-2310
Model DG-2310 is a 2-channel digital gauge counter with multi function to measure and display the dimension and displacement by using our linear gauge sensors (BS/GS-series).Not only the various calculating function of addition/subtraction (A+B, A-B) for 2 channels' data but also that of Max., Min., Range (Max. - Min.) are provided.OK/NG judgment and alarm operation are also possible by using the comparating function.Further, the sequencer, personal computer, recorder and other instruments can be operated by inputting the various signal output from DG-2310, which can make it possible for the data recording and monitoring easily.
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Particle Counter
VLT-E9700
Modern diesel engines are quite clean, provided the soot filter is present and working properly. A soot filter can get clogged, or even malfunction. In that case the filter has to be cleaned or replaced. Unfortunately, sometimes the vehicle owner has the filter removed altogether. When the filter has been physically removed, it is ‘programmed out’ of the vehicle software, so that the removal of the filter remains undetected during an (E)OBD check. This is why in ever more countries a particle count is mandatory during a periodic inspection of e diesel vehicle.
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Electronic Component Counter
ZE 300
REINHARDT System- und Messelectronic GmbH
Instead of the widely used photoelectric barrier technology a new measuring technology is used in the new electronic component counter ZE 300: The laser technology offers a measuring beam with higher energy density and therefore more precise counting and faster counting speed. The ZE 300 component counter is microprocessor-controlled.
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Frequency Meter
Reed Type
*Vibrating Reed type frequency meters are available in size 72 x 72 & 96 x 96mm suitable 110V, 230V & 440V AC Operation.*Scale 45-50-55 Hz.*Model : SF-72 ( R ), SF-96 ( R ).





























