Glycol bottles offer a buffer against temporary air temperature shifts caused by the opening of doors, defrost cycle and HVAC fans. The glycol will slow the response time of the sensor allowing normal daily operations to occur without having a false alarm initiated. They are ideal for walk-in coolers, refrigerators or freezers and other locations that experience drastic, temporary temperature changes.
Glycol buffers have long been recommended by the CDC, FDA and others to help minimize false positives with temperature monitoring.