Dwyer MPM-121 is a dual line configurable panel meter with a temperature range of -40 to 149°F (-40 to 65°C) for operating and -40 to 185°F (-40 to 85°C) for storage. It has an accuracy of ±0.03% of calibrated span ±1 count and supports 10-100% accuracy for square root & programmable exponent. It can be powered by 85 to 265 VAC 50/60 Hz, 90 to 265 VDC, or 12 to 24 VDC ±10% and has a maximum power consumption of 20 W or 15 W depending on the power source. The meter has a NEMA 4X, IP65 front enclosure rating and supports removable screw terminal blocks for electrical connections. It outputs a 4 to 20 mA signal and has a dual-line 6-digit display. It accepts 0 to 20 mA, 4 to 20 mA, 0 to 5V, or ±10V inputs with an input impedance of 50 to 100 Ω. It also has programmable time delays, decimal point positions, and maximum switch ratings. The programming software is available for free and is USB-based, eliminating the need for downloads.