Maretron's TMP100 measures the temperature for up to 6 temperature probes and reports the information over an NMEA 2000 network. The TMP100 supports up to 4 thermistor probes and 2 high temperature thermocouple probes. Optional thermistor probes (-20 deg. C to 80 deg. C or -4 deg. F to 176 deg. F) 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 optimal thermocouple probes (0 deg. C to 900 deg. C or 32 deg. F to 1652 deg. F) are used to measure Exhaust Gas Temperature (EGT) as part of a comprehensive fuel management system.WARNING: This product can expose you to chemicals which are known to the State of California to cause cancer, birth defects or other reproductive harm. For more information go to P65Warnings.ca.gov.