Mvt modules enable the XR440 and XR450 Data Loggers to accept a millivolt or thermocouple input on channel 3. The Mvt-20u, Mvt-100u, Mvt-107b and Mvt-500u are used solely for mV inputs but three modules (Mvt-11b, Mvt-22b, Mvt-50u) can be used for mV or thermocouple inputs (Type J, K, N, R, S, T, B, C, or E). A built-in precision thermistor on channel 1 provides ambient temperature readings and thermocouple cold junction compensation. An Mvt module ...