Phidgets, Inc.    Calgary, AB T2M3R7  Canada
May 25, 2011 Delivering plug-and-play functionality, 1054 - PhidgetFrequencyCounter can be used to measure frequency of analog or digital signal. It counts events from analog signal over time and calculate frequency from it. Able to count logic level or signal centered around 0 V, product can also count signals with different ground as long as they are within common mode range (±10 V). Dual channels enable sensing of 2 different inputs, and measurable frequency is accurate to 0.25% up to 1 MHz.

Mini-Circuits    Brooklyn, NY 11235
Apr 11, 2011 Operating over frequency range of 1-6,000 MHz, UFC-6000 includes USB interface that allows remote display of measured frequencies. At 6.16 X 3.68 X 1.38 in., device has rugged shielded case with 16 x 2 character LCD screen as well as reference input BNC(F) port and signal input SMA(F) port. Also included are 2.7 ft USB cable and power adaptor suitable for US and EU power systems with USB A female connector. Unit can also operate independently using external power supply.

GAO Tek Inc.    Toronto M1B2K4  Canada
Apr 07, 2011 With range of 0.1 Hz to 5 MHz, model A0210001 offers one channel of 8-bit arbitrary synchronized waveform output, two 8-bit input channels for counter/frequency measurement, and external trigger input. Portable unit, capable of reading waveform data files from Tektronix oscilloscopes or waveform editor software, implements DDS technology and generates regular waveforms such as Sine, Square, Triangle, Saw-tooth, TTL, White Noise, Gaussian Noise, Trapezoid, Exponent, and AM/FM signals.

GAO Instruments Inc.,    Toronto   Canada
Nov 10, 2010 Supplied with SDK and API, Model A0200002 uses DDS circuit to produce corresponding DAC refreshing clock and can be integrated into auto-measuring systems. Waveform generator/frequency counter reads waveform data files produced by Tektronix oscilloscopes or waveform editor software and displays waveform. It provides 1 channel of arbitrary waveform output, 8-bit output, synchronized signal output and 2 input channels for counter/frequency measurement, 8-bit input, and external trigger input.

Agilent Technologies, Inc.    Santa Clara, CA 95051
Oct 21, 2010 Offering base bandwidth of 350 MHz and options up to 15 GHz, RF and universal 53200 series delivers up to 12 digits/sec continuous-count, gap-free frequency resolution and 20 psec single-shot time interval resolution. LXI/Ethernet and USB 2.0 are standard, facilitating connection to PC test system instruments or network, and internal memory stores 1M readings. Along with post-measurement analysis capabilities, product provides math and statistical information.

Extech Instruments Corp.    Nashua, NH 03063
Apr 08, 2010 Featuring built-in IR thermometer with laser pointer for hot-spot detection, 1,000 A CAT IV Model EX845 utilizes METERLiNK(TM) technology to wirelessly connect to FLIR IR cameras via Bluetooth(TM), accelerating IR inspections and diagnostics. True RMS meter functions include AC/DC current, voltage, resistance, capacitance, frequency, infrared and contact temperature, diode-test, and continuity check. With 1.7 in. jaw opening, meter handles conductors up to 750 MCM.

J-Works, Inc.    Sylmar, CA 91342
Apr 02, 2010 Available with on board terminal block (screw type) connections or Molex KK series 2 pc pluggable connectors, USB 2.0-controlled JSB542 series DAQ module provides 4 channels of 24-bit counters. Each can be configured as 1 of 5 types of counters: Frequency, Period, Time between pulses, Quadrature, and Event. While Period and time counters have selectable time base of 1-100 MHz, frequency counter has selectable gate times from 1 msec to 2 sec.

Extech Instruments Corp.    Nashua, NH 03063
Mar 25, 2010 Featuring 1.5 in. jaw opening to accommodate conductors up to 750 MCM, AC Model MA620 and AC/DC Model MA640 are 600 A clamp meters with non-contact voltage detector, digital multimeter capabilities, and illuminated dual display with 4-digit readout and bargraph. CAT III-rated units offer user-selectable auto- or manual-ranging as well as various measurement functions such as current, voltage, resistance, capacitance, frequency, duty cycle, diode, and continuity tests.

Casella USA    Amherst, NH 03031
Jan 19, 2010 Designed to perform short-term, environmental noise assessments, pocket-sized Model CEL-621 offers functions ranging from simple baseline surveys to full 1/3rd octave band analysis. Device uses all-digital technology that can measure in just one span up to 140 dB. High-resolution display presents results in color-coded format that minimizes risk of misinterpretation, while on-board memory and USB download allow data to be included in reports without special software.

GAO Tek Inc.    Toronto M1B2K4  Canada
Feb 11, 2008 Designed for CATV system maintenance, Model GAO2002 measures 160 x 130 x 65 mm, weighs 368 g including battery, and offers more than 6 hr operating time. Signal level meter supports Level, V/A, Tilt, and Trunk Level testing as well as testing 2 channels at same time. It features level measurement range of 20 dBµV to 50 dBV with accuracy of ±2 dB and 0.5 dB resolution, 20 dBµV to 50 dBV carrier-to-noise (C/N) option range, and voltage input range of 1-100 V (ac/dc) with ±2 V accuracy.

GAO Tek Inc.    Toronto M1B2K4  Canada
Feb 01, 2008 With 160 x 130 x 65 mm size and less than 600 g weight, Model GAO1001 simultaneously supports 2-channel Level, V/A, Tilt, and Trunk Level testing. It features operating time of more than 6 hr, frequency range of 46-864 MHz, tuning resolution of 50 kHz, and ±50 ppm accuracy. Shockproof device has level measurement range of 30-120 dBV with accuracy of ±2 dB at 25°C and 0.5 dB resolution, and voltage input range of 1-100 V (ac/dc) with ±2 V accuracy and 1 V resolution.

GAO Tek Inc.    Toronto M1B2K4  Canada
Nov 07, 2007 Offering features suited for professionals in CATV industry, DS1151 (B) Super Signal Level Meter is capable of measuring and displaying amplitude at predefined frequency or carrier. Peak-hold level measurement feature in LEVEL and SPECTRUM mode can detect occasional disturbance, and unit is capable of testing analog, digital (QAM), and FM channels. It also supports C/N measurement, voltmeter functions, spectrum analysis, auto test, and data logging.

Laurel Electronics, Inc.    Costa Mesa, CA 92626
Feb 07, 2007 Laureate Model FR 6-digit panel-mount meter can display ac line frequency to 50.0000 or 60.0000 Hz with 0.0001 Hz resolution in few ac line cycles. Frequency signals in kHz range can be read with 0.01 Hz accuracy at up to 25 readings/sec. UL-listed unit's dual-channel signal conditioner can accept signals from proximity switches with PNP/NPN output, TTL/CMOS logic, magnetic pickups, contact closures, and other signals from 12 mV to 250 Vac.

Keithley Instruments, Inc.    Cleveland, OH 44139 1891
Oct 26, 2006 Model 3500 Portable RF Power Meter features frequency range of 10 MHz to 6 GHz and dynamic range of -63 to +20 dBm, enabling it to measure signals directly from device under test or through layers of cabling and fixtures. Data can be captured and transferred to computer via USB interface, allowing for trend or drift analysis. Internal power reference enables self-calibration. Meter can be powered from batteries, ac-dc converter module, or from computer via USB.

Hoyt Electrical Instrument Works, Inc.    Penacook, NH 03303 8798
Apr 06, 2006 Suited for use in harsh environments, 5000 Series monitors from PLC or transducer and requires no power. Gasket sealing design allows for quick modification and scale changes while maintaining instrument integrity. Made with UL 94V material, series is available in custom scales and features dustproof Lexan® construction. Accuracy on all dc and ac versions is ±2% of FS. All meters are 2,600 V RMS with 90° rotation and meet ANSI Specifications C39.1.

B & K Precision Corp.    Yorba Linda, CA 92887
Mar 11, 2005 Model 1856D features 50 ohm terminated input for use in high frequency VHF/UHF/microwave/cellular telephone systems, as well as standard 1 Mohm input for frequency measurements up to 100 MHz. Nine-digit display provides up to 10 nHz resolution to 3.5 GHz, 1 Hz resolution to 100 MHz, and 0.1 Hz resolution to 10 MHz. In Period Mode, unit measures period required for one cycle over range of 5 Hz to 3.5 MHz, while Totalize Mode permits counting of individual events.

KineticSystems Co., LLC    Lockport, IL 60441-2200
Apr 02, 2004 With 8 frequency measurement channels, P635 single-width, 3U module monitors pulse sources in 0.06 Hz to 100 kHz frequency range. Circuitry allows monitoring of varied frequencies without changing module settings. Filtering and hysteresis features ensure noise immunity, and AC or DC coupling of differential inputs is programmable on per-channel basis. Features include TTL inputs, differential input circuits, and programmable observation window.

B & K Precision Corp.    Placentia, CA 92870
Nov 25, 2003 Hand-held Models 103, 104, 105, and 106 utilize RF and microprocessor circuitry to detect audio/video wireless transmissions. Frequency detection ranges are 1 MHz to 3 GHz, 10 Hz to 3 GHz, 1 MHz to 3 GHz, and 30 MHz to 2.8 GHz, respectively. Users can simultaneously view signal strength on 16-section bargraph and detected frequency on LCD screen. All units include 4 selectable gate speeds, display hold, low battery indicator, and rechargeable NiCd battery pack.

Protek Test & Measurement    Englewood, NJ 07631
Jul 07, 2003 Model C3100 features RMS-232 capability for PC communications such as time stamp, data logging, and file storage. Duty Cycle, RPM, Time Interval, Period, and optional GPIB interface functions extend unit's applications. Programmable counter plots trend graphs that are viewable on LCD display and generates comparison, relative error, and min/max functions. Operable on line voltages from 85-270 V, unit is supplied with software to run with Window 95, 98, 2000, and ME.

B & K Precision Corp.    Placentia, CA 92870
Aug 15, 2002 Model 889 Synthesized Bench In-Circuit meter can be used to test inductors, capacitors, and resistors. It makes ac and dc voltage measurements, diode continuity checks, and LCR and ESR measurements at frequencies up to 100 kHz, with basic accuracy of 0.5%. When LCR measurement mode is selected, test frequencies of 100 Hz, 120 Hz, 1 kHz, 10 kHz, or 100 kHz may be selected on all applicable ranges. Dual display permits simultaneous measurements.