The Winters PFP series pressure gauge with stainless steel 316 wetted parts has a glycerin-filled circular dial enclosed in a stainless steel 304 case and a 1/4" NPT male connection, and measures pressure with a single or dual scale with an accuracy of + or - 1% or 1.5%. The stainless steel 316 wetted parts provide corrosion resistance. The socket for the 2.5" and 4" gauges is one-piece welded for strength. The stainless steel 304 case is corrosion resistant and Ingress Protection certified IP66 for protection against solid objects, including dust or liquids, and is appropriate for outdoor and severe ambient and process conditions. The circular dial comes in 2.5" (63 mm), 4" (100 mm), and 6" (150 mm) diameters and is filled with glycerin for protection against vibration and pulsation. The dial is white aluminum with black and red markings. It has an aluminum, anodized black, pointer, and the lens is polycarbonate for high impact resistance. The pointer for the 4" and 6" gauges is micrometer adjustable for ease of calibration. The gauge measures pressure with either a single scale in psi or Hg. vacuum, or a dual scale of either psi/kPa or Hg. vacuum/kPa. The 2.5" gauge is accurate to + or - 1.5% of full scale value. The 4" and 6" gauge are accurate to + or - 1% over the entire range of the gauge, American Society of Mechanical Engineers (ASME) B40.100 Grade 1A accuracy class. The male connection has a 1/4" NPT (National Pipe Thread) rate and comes with a bottom, lower back, or center back mount. The bourdon tube is drawn seamless stainless steel 316 for additional strength, the movement is stainless steel 304, and the welding is tungsten inert gas (TIG) for strength. The socket gasket, fill plug, and lens ring gasket are all made of nitrile rubber for a tight seal. The over-pressure limit is 30% for pressures up to 600 psi (4,147 kPa) and 15% for pressures over 600 psi (4,147 kPa). The working pressure is a maximum of 75% of full scale value. The operating temperature is -4 to 150 degrees F (-20 to 65 degrees C). This pressure gauge is suitable for hydraulic equipment, pressure washers, oil field equipment, pump, compressors, and process systems.

Pressure gauges are instruments used to measure the pressure of a gas or liquid inside a vessel and, often, to help ensure the optimal amount of pressure for a given application. Pressure gauges can range from everyday instruments, such as those used to measure the air pressure in a car or bicycle tire, to highly accurate gauges used in mechanical and industrial processing. Most often, pressure gauges measure pressure relative to another reference. For instance, gauge pressure measures pressure relative to ambient air. An example of a pressure gauge measuring relative to ambient air is a tire pressure gauge or a blood pressure gauge. Differential pressure is the difference in pressure between two points, such as when measuring liquid flow along various points in a pipeline. An absolute pressure gauge measures pressure relative to a perfect vacuum, such as an atmospheric or barometric pressure gauge. All types of pressure gauges include either a male or a female mount to connect to the vessel where pressure is being measured, and display results on a dial with varying increments of measure across a given range.

Winters Instruments manufactures pressure gauges, thermometers, diaphragm seals, pressure transmitters, and switches. The company, founded in 1953, is headquartered in Toronto, Canada.