Monitoring: Amtron & Potter switches

Difference between Type A and Type B 

3.5.2.2 Class A monitoring devices

Class A monitoring shall transmit a signal upon—

(a) a change of status of the monitored component;

(b) any attempt to tamper with or bypass the monitoring device; and

(c) any attempt to tamper with or bypass the connection back to the receiving centre.

3.5.2.3 Class B monitoring devices

Class B monitoring shall transmit a signal upon—

(a) a change of status of the monitored component; and

(b) any attempt to tamper with or bypass the connection back to the receiving centre.

3.5.3 Systems to be monitored

Continuous system monitoring shall be installed—

(a) in systems containing High Hazard portions greater than 300 m2; and

(b) in buildings greater than 25 m effective height.

3.5.4 Components to be monitored

The following components shall be monitored:

(a) Water supply stop valves, including backflow prevention isolating valves but

excluding underground key-operated valves.

(b) Main stop valves.

(c) Subsidiary stop valves (see Clause 8.2.4).

(d) Power supply for each electric-motor-driven pump.

(e) Controller ‘ready to start condition’ and battery voltage.

(f) At the 4 h fuel level for each compression-ignition engine-driven pump.