Extech prc10prc15 calibrators extech prc10 the extech prc10 calibrator is a precision source for calibrating process devices and much more applications include calibration and simulation of process devices transducers transmitters indicators controllers recorders ideal for field test and servicing or bench researchdevelopment its palm sized double molded housing and large dot matrix digital backlit lcd make it both robust and easy to use it can source from 0 to 24ma 25 to 125 f