Precision Digital's Model PD690 is a high performance, easy to use, industrial-grade microprocessor Digital Process Meter. It accepts all the standard process signals: 4-20 mA, 1-5 V, 0-5 V and 0-10 V and displays these signals in engineering units on a 4-1/2 digit display. The display includes an extra zero which may be used to handle numbers up to 199,990.