Monitor two zones with one on-board temperature sensor and an additional remote temperature, humidity or water sensing probe. If temperatures and/ or humidity deviate from the preset limits or water forms a bridge between the contacts on the WaterBug sensor, the designated relay for each zone will activate an alarm, dialer, transmitter, etc. Also known as -EnviroAlert 2-Zone Digital Environmental Monitoring Alarm, 12VDC (M-001-0095)-EnviroAlert 2 Zone Environmental Monitor Base Unit - Winland Electronics - EA-20
