United States Dwyer pressure form the circle: the pharmaceutical industry 高标准 certification special instrument; positive and negative pressure to measure the pharmaceutical, electronics factory clean room clean room, HVAC, clean air-conditioning, clean shower room dedicated table typhoon, clean air filters pressure detection. Range: 0-60Pa, 0- ± 60Pa, 0-125Pa, 0-- ± 125Pa, 0-250Pa, 0- ± 250Pa, 0-500Pa, 0-750Pa range of specifications and other pressure restrictions: -68KPa ~ 103KPa Maximum overpressure: 172KPa (high pressure option overvoltage up 551.6KPa) Accuracy: ± 2% FSO round of domestic pressure meter: Main Specifications: Accuracy: Accuracy 2% fs (suffix 0 of 3%; 4% suffix 00) Rated Pressure: -0.7 ~ 1kg / cm2 Connection: 1/8 "npt thread, two pairs of high and low voltage interfaces, respectively, in the side and back overvoltage: about 1.75kg / cm2 vent opens automatically when the ambient temperature: -5 ℃ ~ 60 ℃ Weight 0.5kg gmp pharmaceutical production verification in accordance with national guidelines for clean room requirements, we recommend the selection: 1. workshop or room plus positive micro-pressure (5-10pa), choose 0-60pa differential pressure gauge 2. Check coarse, medium and high efficiency air filters filtering effect, use 2000-125,250pa, 500pa or 1kpa and other differential pressure gauge, differential pressure filter observed at any time to replace the filter