Wireless Transmission Timing; Maintenance; Battery Change - Sentry 110 Operating Manual

4.4 Wireless Transmission Timing

The wireless transmissions are timed to optimize battery life.
The indoor alarm display will respond within 3 seconds to a
change in alarm state after wireless communications have been
established. The indoor alarm display receives an update from
the outdoor transmitter every 3.5 minutes. It will take 10 minutes
for the indoor alarm display to indicate that no wireless signal
has been received (yellow steady) after the battery has been
removed.

5. MAINTENANCE

5.1 Battery Change

Four AA cell long life alkaline batteries power the outdoor
transmitter. See FIG 4. Follow the diagrams on the battery holder
for correct battery installation; positive and negative battery ends
installed as shown on the battery holder. Replacement batteries
must be new, fresh and replaced as a set of four.
Model 110 Operating Manual
Sentry
Liquid Level Alarm
Page 15