Pyroban Gascheka duo System 5000 Operation Manual page 7

Test gas cylinder, regulator
and pressure gauge
The Test Gas Cylinder contains a non-flammable mixture of
propane in air which is used to verify correct operation of the
Gas Sensing Head.
Electronic button key
The Electronic Button Keys (Dallas keys) are applied to the
Control Unit to control the Gascheka duo system. Colour-
coded keys are provided with the Gascheka duo.
Copyright Pyroban Ltd. Issue 1 Page 7 of 32
Part number PM1083ENG