The BB701-230VAC is a device that has a portable rugged designed that calibrates from -19 to 149°C (0 to 300°F ). It functions as a quick and accurate infrared pyrometer calibrators. It has a built in Digital PID autotune temperature controller with temperature readout. It has a RS-232 standard with built-in RTD Reference probe output. The BB701-230VAC has traceable calibration certificate with three data points. It has special nitrogen purge collar limits and target plate frosting at low temperatures.