Barometric Pressure Sensor Download Catalog Enquiry Barometric Pressure Sensors for WatchDog Weather Stations. Can be programmed to record in either metric (mm) or U.S. (inches) of Hg. Features: Range / Resolution: 26 to 32 inHg, 880-1080 hPa Accuracy: ±0.05 inHg,±1.7 hPa