Mid-West Instrument’s diaphragm differential-pressure gauges completely isolate high and low pressures. The gauges provide full, over-range protection and DP ranges from zero to five inches H20 to zero to 100 PSID with equivalent metric ranges. A variety of switch options are available, as well as a variety of body materials and elastomers. These diaphragm differential gauges are all CSA/UL-rated units for hazardous locations. Models include: 130, 140, 141, & 142.