Simultaneous operation of one on-board sensor and one additional external sensor(sold separately) with easy to read LCD display and tamper proof lock setting.8 event incident memory, including time and date with auxiliary output relay for local audible alarm(not included) with alarm silence feature with 10 minute timer and up to 120 minute alarm time delay programable for each zone.Do NOT place EA200-24 into cooler/freezer environments. Use aWired sensor connected to the EA200-24.Adjust sensor reading with offset up to ±9.0Power requirements of 24V DC @ 120mAOn-board temperature sensor for ambient temperature range of 32 to 122 F (0 to 50 C)Unit operating range of 32 to 122 F (0 to 50 C) in non-condensing environmentSensor dependent low limit and high limit adjustment range of -58 to +302 F (-50 to +150 C)2 configurable Form C (SPDT) alarm output relays (N.O./N.C.) and 1 non-configurable Form C (SPDT) auxiliary alarm output relay (N.O./N.C.)Device dimensions of 6.0" x 4.75" x 1.25" (15.24cm x 12.07cm x 3.18cm) 
