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RF Meters
Click here for meters capable of processing digital signal properly.

UltraSensitive Wideband RF Meter


This is one sensitive puppy! Designed to sniff out even the tiniest RF transmitter, it will catch everything from 1-2500 MHz. Analog readout on a relative scale makes direction finding fast and easy. Simply hold the unit horizontally and point the built-in telescoping antenna in the direction of the suspected source. Sweep 360° to find what other RF sources may be present. Can differentiate between distance sources such as towers and nearby sources such as surveillance bugs and cell phones. Adjust gain with the length of the antenna and the sensitivity adjustment control. Complete with instructions and 9V battery. Made in USA. Great price too!

Made in USA UltraSensitive Wideband RF Meter (Cat. #A177) …. $185.00 add to cart

Dual RF/IR Detector

Dual RF/IR Detector

Light beams, especially lasers, provide an excellent method for carrying audio intelligence and are not detectable by ordinary RF (radio frequency) detectors. For those who need either a very sensitive RF detector or an infrared (IR) detector this unique item allows you to search for sources of either RF or infrared transmissions.

With its bandwidth of 1 MHz to 2500 MHz and its extra sensitive circuitry, it will pick up signals that other detectors may miss. It is designed to pick up subminiature radio and infrared transmitters wherever they are located - in your home, office or car. To change from RF to IR detection, simply use the convenient front panel switch.

Using the SENSITIVITY control and meter readings, you can quickly zero in on hidden RF and IR transmitters. Also use it to check your telephone and its associated wiring for RF bugs and taps. Can even be used to test your IR remote devices (TV remotes, etc.). Spectral Peak at 940 nm.

Weighing only 8 oz., it is furnished in a high-impact case that measures 5.3" x 3.3" x 1.5". The telescoping whip antenna can be extended 33". The unit comes complete with 9 volt battery, antenna and instructions.

Made in USA Dual RF/IR Detector (Cat. #A177-IR) …….. $265.00 add to cart


RF Counter & Field Strength

3 GHz Frequency Counter

Want to know the frequency of RF sources such as cell towers, TV and radio stations? Here's a handy unit that's priced right. The Broadcast Frequency Counter is an excellent economical choice for 2 big reasons: it offers both a frequency counter and bargraph type field strength meter. 7 digit display gives plenty of information about the predominant incoming frequency and the very low (<5 mV) nominal input sensitivity provides stable readings even with smaller injected signals. Covers the entire frequency range of 30 MHz to 2.8 GHz for digital, on/off keying, and analog signals.

Telescoping antenna included, but this 50 ohm input unit can also be attached to other antennas or line with BNC connector (maximum input is 15 dBm). Powered by 9 VDC wall plug adapter/charger (included) or 5-hour built-in NiCd battery. 1 yr mfr wty.

Note: The sensitivity for broadcast signals is low. In other words, the broadcast signal must be quite strong to register on the bargraph.

Broadcast Frequency Counter (Cat. #A119-D) …..……. $269.00 add to cart

Digi-Field Field Strength Meter

Very Wide Band RF Receiver


Measuring radio frequency and microwave radiation has never been easier! This unit covers the amazing range of DC - 12 GHz and will give you digital readout of the relative field strength of broadcast signals such as cellular phone, microwave oven leakage, TV station, CB radios using the (1MHz - 1GHz) telescoping antenna provided. Can also be used to measure 60 Hz electric field signal from powerlines and wiring. Even use it as an RF safety monitor! Adjusting the length of the antenna will affect the signal gain. Other antennas (not included) can be obtained for extended frequency ranges.

Can also be used to make relative power measurements (and determine power loss) of single frequency coaxial sources such as cable TV, and with simple adapters, this meter may also be connected directly to any receiving antenna to measure signal strength while the antenna is tuned, modified or repositioned.

Includes an ACV output (3.5 mm mono) which allows user to log spectrum/intensity data to a remote device.

Large 3˝ digit LCD readout is easy to see. Only 3" x 4" x 1˝" and weighs less than a pound, this is good value for checking high frequency radiation sources, tuning or modifying broadcast antennas, or testing the effectiveness of your RF shielding. Powered by a standard 9V battery which is included. 1 year mfr. warranty. Made in USA.

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Made in USA Digi-Field Meter (Cat. #A129) ................... $249.95 add to cart

Audio Amplifier Connector Cable Add sound to your Digi-Field Meter with this simple accessory!

Amplified speaker plugs into ACV outlet on meter to provide demodulated sound which corresponds to the intensity and frequency of the signal. You can hear the difference between analog and digital signals. Most useful: you can easily hear the harsh bursts from utility smart meters at close range. Great for demonstrating this effect to your friends and neighbors. Speaker uses one 9V battery (not included). Be sure to get the 6' connector cable too.
Audio Amplifier (Cat. #A173) ....................... $14.99 add to cart
Connector Cable (Cat. #A134-cab) ................... $4.95 add to cart

Natural EM Meter

The Natural EM Meter

"Audible RF Alarm"

In addition to measuring changes in extremely weak static (DC or "natural") electric and magnetic fields, the NATURAL EM METER gives a readout of radio/microwave signal strength in mW/cm˛ and has and audible alarm. The threshold of the alarm can be set at any level from 0.01 mW/cm˛ to 1 mW/cm˛. Using both a needle type meter and audible tone, it detects: radio transmitters, geomagnetic storms, unusual magnetic solar activity, electrical activity of thunderstorms, leaky microwave ovens, magnetized rocks or bed frames, analog cellular phone EMF output, and concealed surveillance bugs. Perfect low cost RF alarm for those working near RF equipment and antennas. RF sensitive down to 0.01 mW/cm˛, with a full needle deflection at 1 mW/cm˛ over the frequency range of 100 kHz to 2.5 GHz. 9v battery included. One year manufacturer's warrantee.

Made in USA Natural EM Meter (Cat. # A151)....................$199.95 add to cart

Frequency Generator


"Low Frequency Test Signal Generator"

Make some waves! Need a source of 20 Hz to 150 kHz frequencies? Handy little unit fits in your shirt pocket and is very simple to operate. Produces nice clean sine waves (adjustable intensity up to 1.2V rms) or square waves (p to 8V p-p) with 5% frequency accuracy. Simply dial in the desired frequency. Uses 9V battery (50 hrs typical use). Includes low battery indicator, test leads and 9V battery.

Check the response of your gaussmeter to various frequencies (connect the Frequency Generator to the Degaussing Coil to generate several mG fields at various frequencies), test your frequency counter, connect to a speaker/headphones to test your hearing range! Also great for field/bench service of audio equipment, car stereo, etc. Bargain price!

Generator frequency20Hz~150KHz in 46 steps ±0.5dB
Sine wave output1.2V RMS minimum in 600 Ohm
Distortionless than 0.05% (200Hz~15KHz)
0.1% (50Hz~30KHz)
less than 0.3% (20Hz~100KHz)
Square wave output8V p-p max. (no load)
Rise/fall timeless than 0.5µsec
Overshootless than 2%
Duty ratio50% ±5%
Output impedence1 KOhm
Dimensions3 3/8" (W) x 6" (H) x 1" (D)

Frequency Generator (Cat. #A423)……. $74.95 add to cart

Can't decide which meter is right for you?
Click here to go to the handy Meter Selection Guide.

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