This is what we used in literally hundreds of Nextel sites for temperature alarms:
http://www.grainger.com/Grainger/items/1UHH2 This provides either an open or closed contact indication. I don't remember them ever failing. 73, Joe, K1ike rahwayflynn wrote: > Any suggestions on reliable freeze warning thermostats? I have a Liebert > RCM8CE Remote Alarm Monitoring system and would like to add high quality > thermostats for low & high temp warning. >
