Mid-West Instrument”s Model 240 switch now features a differential-pressure transmitter option designed to provide users a low-cost, loop-powered 8-28 VDC two-wire solution in a heavy-duty, cast-aluminum housing. Wiring access is through a 1/2” NPT port. This unit is not yet listed for use in hazardous locations. Accuracy is +/-2 percent from 20 percent to 100 percent of full scale. Indicator accuracy is +/-2 percent and is independent of the transmitter operation. The diaphragm-operated unit provides total separation of high and low pressure by means of a convoluted elastomer diaphragm. The transmitter can be used to measure pressure drop across filters, strainers, separators, valves and pumps. Pressure-containing elements are available in aluminum or 316 SS. Safe working pressure for aluminum and 316 SS is 1500 PSIG with full over-range protection to maximum working pressure. Differential-pressure ranges from 0-20 in. H20 to 0-100 PSID (0-50 mbar to 7 bar) are available. Gauge fronts with 4.5-inch dials have shatter-resistant lens and use reinforced, engineered plastics to eliminate corrosion.