250-AF Inclined Manometer Air Filter Gages
Precision machined, virtually unbreakable and free of distortion.
Dwyer® Durablock®Series 250-AF Gages are precision machined 1 in thick solid acrylic plastic, virtually unbreakable and free of distortion. The fluid bore is precision drilled to ± 0.0002 in to assure life long accuracy. A glass spirit level is built into the body and encapsulated to prevent damage or tampering. The scale is mirror polished chrome plated brass to assure parallax free reading by alignment of the meniscus with its reflection. Safety traps are incorporated in the body to prevent loss of fluid due to pressure surges. Red and green signal flags indicate clearly when a filter change is necessary. Gages are suitable for use in ambient temperatures of -20°F - 150°F. Connection fittings are positively sealed by "O" rings but easily removed for zeroing or addition of fluid. Furnished complete with instructions.
Economy Model 452-AF is similar to 250 Series except that it is not equipped with over pressure traps. Two A-324 1/4 in compression fittings are included with each gage but not shown. Bodies are of 5/8 in thick acrylic and scales are mirror polished, epoxy coated aluminum.
• High accuracy and easy to use, making it a dependable device for many years of service
• Easy to read polished inclined scale allows minute pressure differences to be read
• No moving parts mean no calibration or nothing to wear out
• Air filter gage
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Accessories
![A 324 Compression Fitting 05124]()
DwyerA-324 Compression Fitting
Compression fitting for 1/8 in NPT to 1/4 in metal tubing to connect a filter or muffler to the Dwyer Magnehelic and Capsuhelic gages
Buy now!$6.45 USDNormally ships in 6-8 weeks- In Stock *
![A 101234 Red Gage Fluid 05141]()
DwyerA-101/2/3/4 Red Gage Fluid
The standard fluid for use in inclined manometers, "D" type vertical manometers, and all Dwyer gages using red fluid
Starting at$12.85 USDSome SKUs available now ![A 210 Aluminium Tubing 14 OD 50ft 07278]()
DwyerA-210 Aluminium Tubing (1/4" OD), 50ft
Aluminum tubing is recommended for permanent installations.
Buy now!$9.50 USDNormally ships in 1-2 weeks![A 310 B 3 Way Vent Valve 07349]()
DwyerA-310B 3-Way Vent Valve
Plastic 3-way vent valve
Buy now!$18.20 USDNormally ships in 2-3 weeks![A 317 Gage Connector 08578]()
DwyerA-317 Gage Connector
Gage connector, 1/8" pipe thread opening, less OD thd., for slip fit in 3/4" dia opening in 250 Series AF gages.
Buy now!$28.25 USDNormally ships in 3-4 weeks![A 322 Gage Connector 08579]()
DwyerA-322 Gage Connector
Gage connector for 1/4" tubing, slip fits in 3/4" opening in 250 Series AF gages (compression nut and ferrule not included).
Buy now!$12.05 USDNormally ships in 3-4 weeks
