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