Maretron's Temperature Sensor Monitor measures the temperature for up to 6 temperature probes and reports the information over an NMEA 2000® network. The Temperature Sensor Monitor supports up to 4 thermistor probes and 2 high temperature thermocouple probes. Optional thermistor probes (-20 Degree Celsius to 80 Degree Celsius or - 4 Degree Fahrenheit to 176 Degree Fahrenheit) cover a wide range of applications including cabin air temperature engine room air temperature refrigerator/freezer temperature under bolt temperature (inverters charges pumps motors etc.) tank temperatures (live well bait hot water etc.) and air duct temperatures. The optional thermocouple probes (0 Degree Celsius to 900 Degree Celsius or 32 Degree to 1652 Degree Fahrenheit) are used to measure Exhaust Gas Temperature (EGT) as part of a comprehensive fuel management system. The Maretron Temperature Sensor Monitor is designed to operate within the harsh demands of the marine environment. However no piece of marine electronic equipment can function properly unless installed configured and maintained in the correct manner. Please read carefully and follow these instructions for installation configuration and usage of the Maretron Temperature Sensor Monitor in order to ensure optimal performance. Temperature Sensor Monitor NMEA 2000® Interface Waterproof Connectors Sealed Waterproof Enclosure Opto-Isolated From NMEA 2000® Eliminating Potential Ground Loops Six Relays For On And Off Control Over NMEA 2000® Network