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Hermes Monitor Unit

Technical Information

Catalogue No: C0342
Category: Surveillance/Acoustics
Object Type: Indicator/Instrument
Object Name: Hermes Monitor Unit
Part No: 4-242 DL14400
Serial No: 022/92
Manufacturer: GEC Avionics
Division: Unknown
Year of Manufacture: 1992
Dimensions: Width (mm): 170
Height (mm): 310
Depth (mm): 80
Weight (g): 2,950
Location: Rack RAA06 [Main Store]

GEC Avionics Limited
Hermes Monitor Unit
Part 4-242 DL14400
Ser 022/92
Code K0978


The battery compartment shown on the rear of the unit accommodates the same battery type shown with the related Sensor Unit. Alternatively the unit may be powered by the related Battery Pack via the bottom-left 7-way connector.

One of the related Aerials screws onto the top-right TNC connector).

The "EBL.R. APR 90" mark indicates it was serviced at Rochester in 1990.

Hermes is a family of VHF radio linked equipment using both seismic and passive infra-red sensors to detect vehicles and men, giving clear indication of classification, direction and numbers. The hand held monitor can simultaneously display the information from a group of up to 10 sensors and can respond to up to 80 sensors in groups of ten. Relay units are provided to enhance the range between sensor and monitor. The equipment was made at Borehamwood (Manufacturer's code: K0978) but was maintained by the Aviation Service and Repair Division at Rochester.

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