The UPM-3 is available in either a loop (4-20mA), A.C. or D.C. signal or external power version. The external powered versions can accommodate 4 relays, isolated DAC and power for the analog output (1 per channel). Other options include >30 signal conditioners and isolated input power options, as well as Ethernet, USB or RS485 and automatic/programmable colors (red/green/yellow) on each character. This model is available with either 1, 2 or 3 channels. You can use the UPM as a DPM (Digital Panel Meter) for analog inputs and/or a universal timer/counter for 15 different functions, including Log & Anti-Log, Datum Zero, Frequency, etc. In addition, the included match functions (+, -, √, ÷, x) enable it to be used as a scientific counter. The UPM-3 meets 4" ANSI mechanical dimensions and is available in Nuclear Class 1E, MIL-Std., and industrial grades. The UPM Series features 10 different mechanical models, from the flat pack to the explosion proof, and custom orders are welcome! As with all our products, the UPM comes with a Lifetime Warranty (limited) and has a CMTBF (Calculated Mean Time Between Failure) of 40 years!