Monitor Temperature in Cold Storage Area with Sensaphone FGD-0107 Sensor NIST Certification included on this sensor Glass bead filled vial buffers any momentary fluctuations that may cause a preliminary alarm dial out, such as defrost cycles, opening of doors, and fans circulating air. Glass beads slow the response time of the sensor allowing normal daily operations to occur without having an alarm. Temperature Sensor FGD-0107 Specifications Must be used with a Sensaphone. Accurate to /- 1 degreesC /- 1.8 degreesF Compatible with Sensaphone models 400, 800, 1400, 1800, 2800, 2000, StationSitter, Express II, and WEB600. Temperature Range Differs depending on Sensaphone models 400, 800 20 degrees to 150 degreesF 30 degrees to 65 degreesC 1400, 1800, 2800 109 degrees to 115 degreesF 78 degrees to 46 degreesC 2000 121 degrees to 123 degreesF 85 degrees to 51 degreesC Express II 85 degrees to 200 degreesF 65 degrees to 93 degreesC Package Contents 1 Temperature sensor, 1 12 wire and Installation instructions. Temperature sensor FGD-0107 was designed for cold storage temperature monitoring inside freezers and refrigerators. Glass bead filled vial buffers any momentary fluctuations that may cause a preliminary alarm, such as defrost cycles, door openings and fans circulating air. The temperature seen by the Sensaphone is closer to the actual temperature of the items in the cooler than the air temperature. The glass beads slow the response time of the sensor allowing normal daily operations to occur without having an alarm initiated. A popular combination is to use this sensor with the new Web600 for a low cost cold storage solution that is web based and capable of monitoring ultra low temperature applications down to 85 Deg C. This item ships from a separate warehouse and may require extra time for delivery.