| 摘要 |
<p>A control unit, connectable to a cut-off device, the control unit comprising a warning system, a cut-off device controlling system, and a reset system. Preferably the control unit is connectable to a cut-off valve that forms part of a fuel supply system, for example, a gas supply system. Preferably the warning system serves to warn users that the gas supply system is due a service after a first pre-programmed period of time and the cut-off device controlling system serves to cut-off the gas supply system if a service is not carried out before a second pre-programmed period of time,</p> |
