Johnson Controls A19AAB-40C 22/01 When the electrochemical cell reaches

When the electrochemical cell reaches its end of life after approximately six years

synchronized 1 HZ flash

Presignal models (GSA-M270P) are equipped with a general alarm (GA) keyswitch for applications where two stage operation is required

EOL Resistor

the strobe is intended to notify those that may have a hearing impairment

Johnson Controls A19AAB-40C 22/01 When the electrochemical cell reachesJohnson Controls A19AAB 40C : High Range Temperature Control, 100 to 240 Deg F (38 to 116 C), Fixed Differential, 12" Capillary, SPST, NEMA 1, 3 8 x 3 1 2" Bulb, Open High Datasheet (Technical Specifications): Download A19AAB 40C Datasheet (PDF)