Specialists in all types of CCTV equipment



B/W Body Cameras
Colour Body
Board Cameras
Mini Cameras
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Low Light
IR Cameras
Guardian Home
Outside Cameras
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Dummy Cameras
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RF Modulators
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Camera Lenses
IR illuminators
Record Systems
Camera Housing
and Wall Brackets
Power Supplies
and Cables
Video Recorders
GeoVision Digital
Vehicle Rear View
Video Entry
B/W Monitors
Colour Monitors
LCD Monitors
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We accept Visa, Master Card, Delta and Switch Cards

We are UK based, if you prefer to
phone on 020 7258 1831.
Monday to Saturday, 9.30AM until 5.30PM
We accept Visa, Master Card, Delta and Switch Cards

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GeoVision GV-I/O

GV-Net Card

RS-232 / RS-485 data converter

Connects up to 9 RS-485 devices in serial

GV-Net Card £25.00

Digital input / output controller
8 digital input channels
Input singnal: 0~5 V DC
16 open collect digital output

GV-I/O £60.00

8 channels relay output module
Relay on time: 8 ms
Relay off time: 5 ms
Relay capacitance: P6A/250V AC ;
10A/125V AC ; 5A/28V DC

GV-Relay £50.00
Notes on System Installation and Operation
You must be experienced in alarm and sensor wiring without using our devices first, then are capable to learn how to add our device to complete the loop.  Installation should be attempted only by individuals familiar with proper installation techniques and with codes, standards, and proper safety procedures for control installations. 


Henrys Electronics Ltd
404 Edgware Road, Paddington, London, W2 1ED, UK,
VAT Number : GB 241 7629 61
Tel:+44 (0)20 7258 1831, Fax:+44 (0)20 7724 0322, email:


All prices exclude 17.50% VAT, and Carriage Charges. For UK and Europe Please Add 17.50% VAT To All Prices, E & O.E. Last Up dated and Validate January 2004. All comments or enquires to: layout and design Duncan Evans, Copyright ©1997-2004 Henrys Electronics Ltd.