Mid-West Instrument”s Model 140-142 transmitters provide a simple, low-cost, loop-powered 8-28 Vdc two wire 4-20 mA solution for a variety of applications. The transmitter and its terminal strip is housed in an aluminum housing with 1/2” NPT wire access for easy field wiring. Accuracy is +/-2 percent from 20 percent to 100 percent of full scale. Indicator accuracy is also +/-2 percent full scale and is independent of the transmitter output. This design provides total separation of high and low pressures by a convoluted elastomer diaphragm. The units are available with pressure-containing elements of aluminum, brass, or 316 stainless steel. Safe working pressure for aluminum and 316 stainless steel is 3,000 PSIG, and for brass it’s 1,500 PSIG. Full over-range protection is provided to full safe working pressure. Differential-pressure ranges from 0-20 in. H20 to 0-100 PSID (0-50 mbar to 0-7 bar) Gauge fronts are of reinforced, engineered plastics to eliminate corrosion.