Keeping a cool leve
Page 48

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A fluid level detector switch for monitoring radiator water levels has been developed in conjunction with Vauxhall Motors truck division by Gentech International. The company is also working with other companies to provide a switch suitable for monitoring engine oil levels.
Designated the type FH 4A-000, the water level switch incorporates a hermetically sealed reed switch which will operate through an operating temperature range of -30°C to +110°C in environments of low shock and vibration.
The switch can operate in a wide range of fluids including alkalis, alcohols, dilute mineral acids, detergents and greases and oils. Either high or low level can be monitored simply by inverting the switch.
Available from: B. and R. Relays Ltd, Temple Fields, Harlow, Essex.