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RF Meters
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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

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