Wahl Instruments Inc., Asheville, NC, offers the TC621 and TC622 pocket temperature calibrators designed to simplify the maintenance and commissioning of thermocouple and RTD probes and transmitters in harsh environments. The TC621 thermocouple calibrator can measure and simulate 14 different thermocouple outputs with 0.02% accuracy of reading and a 15 ppm/°C temperature coefficient. The TC622 measures and simulates 12 different RTD types with 0.02% accuracy of reading and a 10 ppm/°C temperature coefficients.
