- Operates the LA1 on AC power for reliable continuous operation
- Batteries now operate as a backup in case of AC power failure
- LA1 alarm unit remains intrinsically safe
- AC Output controls external annunciator (sold separately)
- Probes are always monitored, even when unit is asleep
- Intrinsically safe operation (Complies with ANSI / UL 913, Class 1, Div. 1&2, Group C and D operation)
- 2 year warranty
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