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Dwyer Instruments 460 Air Meter/Draft Gage, Plus/Minus 0.005 - 0.09 Inch Direct reading velocity and static pressure scales both low and high ranges show supply and return grille velocities, furnace draft, pressure drop across filters, etc. The 460 gives consistent, accurate results with no tedious calibration. Rugged plastic for rough daily use. Dual velocity ranges read 260 - 1200 and 1000 - 4000 FPM, pressure ranges from 0.005 - 0.09 and 0.05 - 1.0 Inch WC.

Dwyer Instruments ADPS-03-2-N Adjustable Differential Pressure Switch, 0.2 The series ADPS adjustable differential pressure switch is designed for pressure, VAC uum, and differential pressures. The dual scaled adjustment knob in inches water column and pascals allows changes to the switching pressure to be made without a pressure gage. The ADPS is available with settings from 0.08" WC upto 20" WC. The silicone diaphragm and PA 6.6 body make the series ADPS ideal for use with air and other noncombustible gases. The compact size, adjustment knob and low cost make the ADPS the perfect choice for HVAC applications.

Dwyer Instruments Flex-Tube 1221-16-W/M U-Tube Manometer, 8-0-8 Inch WC, 17 Inch L Dwyer's inexpensive manometers measure positive, negative and differential pressures. Dwyer Flex-Tube U-Tube manometers combine the inherent accuracy of the simple "U" Tube with the durability of tough, long-lasting plastic construction. Columns are of 0.375 Inch outside diameter. flexible and shatter proof clear butyrate tubing. They are easily accessible for cleaning. Indicating tube is backed by white scale channel to provide maximum color contrast. Scales are extruded high impact polystyrene plastic, formed to hold columns in perfect alignment. Stark white scales have graduations and numbers silkscreen-printed in black for maximum legibility. You can choose from numerous models and features including over-pressure safety traps, in full scale ranges from 8 - 36 Inch of water or mercury. All are suitable for total pressures to 100 psig. Ideal wherever a portable, direct reading manometer is needed.

• Simplest, lowest cost basic U-gage
• A dependable U-tube manometer that withstands hard use and provides accurate, high visibility readings
• For mercury filled manometers, a scale clamp bar, Dwyer part number A-363 is recommended
• Magnetic clips for mounting to any vertical steel surface, and clamp bar to insure against U-tube slipping
• Both magnets are easily removed and replaced at the user's convenience
• High contrast scale for better precision when measuring
• 6.3 oz Hg required to fill
• 2 magnetic mounting clips, tube clamp, 2 plastic carrying plugs and 2 flexible plastic tubing connectors for attachment of 3/16 Inch rubber or plastic tubing without kinking, 1oz bottle 0.826 sp. gr. red gage fluid furnished for D style manometers, fluorescein green dye concentrate furnished with "W/M" style manometers Dwyer's inexpensive manometers measure positive, negative and differential pressures. Dwyer Flex-Tube U-Tube manometers combine the inherent accuracy of the simple "U" Tube with the durability of tough, long-lasting plastic construction. Columns are of 0.375 Inch outside diameter. flexible and shatter proof clear butyrate tubing. They are easily accessible for cleaning. Indicating tube is backed by white scale channel to provide maximum color contrast. Scales are extruded high impact polystyrene plastic, formed to hold columns in perfect alignment. Stark white scales have graduations and numbers silkscreen-printed in black for maximum legibility. You can choose from numerous models and features including over-pressure safety traps, in full scale ranges from 8 - 36 Inch of water or mercury. All are suitable for total pressures to 100 psig. Ideal wherever a portable, direct reading manometer is needed.