Oceanic Systems Temperature Sensor Module 4 x Type K inputs - 4521Oceanic Systems Temperature Sensor Module 4 x Type K inputs 4521 OS N2K TEMP 4C K 4521 The Oceanic Systems 4521 4 Channel Temperature Module monitors up to 4 type K thermocouples and reports their temperature over the NMEA2000 network. These thermocouples can include their rugged engine room temperature sensor 4525, their Cabin air temperature sensor 4522, there liquid temperature sensor 4523 and their ring bolt temperature sensor 4524. The unit will