ME-400 Indoor Doppler Intrusion Sensor

© Brooke Clarke 2010

Background
Operation
Related
Links

ME-400 Indoor
                  Doppler Intrusion Sensor
ME-400 Indoor Doppler Intrusion
                Sensor
ME-400 Indoor Doppler Intrusion
                Sensor

Background

This sensor uses the same technology as some of the outdoor intrusion sensors (GSQ-160) and was available very inexpensively on the surplus market.

Operation

Upon opening the top cover it's clear there are only three connections.
When a lab power supply (Agilent E3617A) is used to slowly increase the voltage while watching the airwaves for a signal using a small antenna a signal appears when the input is at about 3 volts and the ME-400 is drawing a milliamp or so.  By 4.88 V the output frequency is at a minimum and increases slightly by the time the voltage is 5.0.  There does not appear to be much signal strength change from 3 to 5 V so this box is probably designed to run from +5 V.

The operating frequency is in the neighborhood of 328 MHz but varies tens of kHz depending on what's near the ME-400 antenna.

Related

GEO_ID - TRC-3, PEWS, USQ-42, Turd
GSQ154 - All GSQ-154
GSQ160 - Frequency Disconnect -GSQ-160, USQ-46, TS-2963, PP-6446 - TCw - cylindrical module pinouts.
GSS26 - AN/GSS-26 minimal info
ID -  Outdoor Intrusion Detectors and Related Equipment
Intrusion Alarm Patents
USQ_Rx - Igloo White, USQ-42, USQ-46 details,
PSR-1 - now on it's own page (July 2007)
Sensors - many types some related to sensing people

Links

Surplus Shed has these (Feb 2010)

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Page created 11 Mar 2010.