double knock moduleThese AD100 double knock modules were made by GARDINER TECHNOLOGY LTD and will give an output upon either two activations within a variable (10 to 110 second) time window OR a single alarm signal of a preset (3 to 15 second) time duration. Supply 12 volts DC. Input and output normally closed.

Unused stock, with original fixings and instructions.

£5.00 DOUBLE KNOCK MODULE Out of stock