Dwyer 1221/1222/1223 Flex-Tube® U-Tube Manometer

Part Number: 1221/1222/1223 Category:

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Dwyer Series 1221/1222/1223 is 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 .375″ O.D. flexible and shatterproof clear butyrate tubing. They are easily accessible for cleaning. The indicating tube is backed by a 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.

Numerous models selection and features including over-pressure safety traps, in full scale ranges from 8″ to 36″ of water or mercury. All are suitable for total pressures to 100 psi – for determining velocity and static pressures, leakage, fan and blower efficiency, filter resistance, and gas pressures. Ideal wherever a portable, direct reading manometer is needed. Standard ranges and markings as shown or special ranges, colors, logos, and brand names for OEM quantity orders are available.

Product Applications

  • Duct static pressure
  • Calibration labs
  • Filter monitoring
  • Minor Divisions of 1/10″ water column (or 2mm water column on metric units) are silkscreened in jet black on a stark white scale for positive definition. Easy to read, even at a distance, they are acrylic-coated for permanence. All models are furnished with one 3/4 ounce bottle of fluorescein green color concentrate with a special wetting agent for W/M models, or a 3/4 ounce bottle of red gage fluid for “D” units.
  • Series 1221 Manometer – Our simplest, lowest-cost basic U-gage. A dependable U-tube manometer that withstands hard use and provides accurate, high visibility readings. For use with water, mercury, or red gage fluid. For mercury-filled manometers, a scale clamp bar, Dwyer® Part No. A-363 (available as an extra for Series 1221 – and standard on Series 1222) is recommended. One pair of carrying plugs and a pair of non-kink vinyl tube connectors are included with each manometer.
  • Series 1222 Manometer – All the features of the 1221 plus magnetic clips for mounting to any vertical steel surface, and clamp bar to insure against U-tube slipping. (Especially recommended for manometers used with mercury.) Both magnets are easily removed and replaced at the user’s convenience.
  • Series 1223 Manometer – Our finest U-gage – for either portable or stationary use. Safety traps prevent loss of indicating fluid in case of accidental over-pressure. Tubing is permanently bonded to a molded, high-impact acrylic plastic top that contains safety traps. Large magnetic clips and a clamp bar are provided. Standard type “a” connections include two rapid shut-off type molded nylon tubing connections, two 3′ lengths of flexible Tygon® plastic tubing, and two 1/8″ pipe thread to tube adapters.

Manuals: Instruction Manual
Catalogue Pages: Series 1221-1222-1223 Catalog Page

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