Monitor fluid temperature with AVTECH's Digital Fluid Temperature Sensor. This sensor provides real-time temperature values from -67 to 257 degrees Fahrenheit and/or -55 to 125 degrees Celsius when used with any Room Alert environment monitoring device. Accuracy is within +/- 0.125 degrees. It's special sealed tube containing Propylene Glycol makes it an ideal sensor to monitor refrigerated items, tracking their temperature instead of the surrounding air temperature.