DescriptionWith the CL541-PLUS you can check and calibrate all your thermocouple instruments and measure thermocouple sensors. Take it without worry into the lab, plant or field. It comes protected with a rubber boot and rugged, low profile switch. Easy to operate even in dark areas with the backlit display. Stop carrying around a millivolt source and thermocouple tables, you can calibrate directly in temperature (°C and °F).