The Altek 211 is a portable temperature calibrator that is intended for simulating RTD inputs. It integrates an RTD thermometer as well as QUIK-CHEK Switch. This device can exhibit an accuracy rate of ± 0.013% of Span (± 0.2 °C/ ± 0.3 °F). In addition, it is suitable for utilization in various applications including transmitter, recorder, controller, alarm, indicator, process data acquisition and computer system.