Why SENCTRL PRV-Tex Series? The SENCTRL PRV-Tex series pressure gauges adopt the PRV-Tex Vent design, make these models an ideal solution for many pressure measurement installations. Enable pressure compensation and waterproof at the same time. Offer a clear reading and weather resistant. Why is waterproof important? Sometime the pressure gauge need to be installed in environments exposure to moisture or rain, such as swimming pool and outdoor gardan. If the gauge is not water tight, the infiltrating water will condense inside and cover the surface of glass with small drops of water and make it difficult to see through or reflect a clear reading. Ultimately cause moisture damage and reduce the service life of gauge. Liquid-filled pressure gauges are also waterproof, so why not choose liquid-filled gauge? First, liquid leakage will cause contamination or danger, especially in food and drinking water safety applications.Second, it will affect the accuracy of the readings. For ≤300 psi pressure ranges, sealed gauges require some type of vent valve, compensating membrane, or other mechanism for pressure compensation. Otherwise, changes in ambient temperature such as direct sunlight would distort the measured pressure. (No compensation is necessary in gauges with >300 psi pressure ranges, as the pressure built up inside the case is negligible in relation to the full scale range.)Third, the filling liquid will affect the applicable temperature of the pressure gauge. For example, the viscosity of glycerin will become very high at low temperature, so that the pointer of the pressure gauge cannot move. How to choose the right scale range? The user must ensure that the appropriate pressure gauge has been selected in terms of scale range and design. The scale range is optimally selected when the operating pressure lies in the middle third of the scale range. Where are PRV-Tex series pressure gauge used? Examples include: Pumps and compressorsFilter regulatorsFluid power equipmentsPool and spa filtersHydraulics and pneumaticsOEM equipmentBeverage dispensing equipment, coffee espressoIndustrial machineryOutdoor use