Model 475-1-FM-AV Air Velocity Kit

Model 475-1-FM-AV Air Velocity Kit

Model 475-1T-FM-AV Air Velocity Kit

Model 475-1T-FM-AV Air Velocity Kit

Series Mark II Molded Plastic Air Velocity Meter

Low in Cost – Direct Reading Scales Offer 3% Accuracy – For Portable or Stationary Applications

Construction is simple with virtually indestructible molded white styrene-acrylonitrile housing, indicating tube and fluid wells, molded ABS knobs and zero adjust plunger, shock mounted glass level vial and leak proof "O" ring seals. Scales are lithograph printed on aluminum and epoxy coated.

For stationary applications, the Mark II air velocity meters can be easily mounted on any vertical surface with the two screws provided. A built in spirit level simplifies leveling.

Just fill the reservoir, adjust fluid level to zero, connect the Pitot tube, and it is ready for operation. For portable applications, the Model A-612 portable stand is available for Models 27 and 28.

A molded plastic swing-out stand and leveling screw for user installation are provided with the Model 40-1-AV which also features rapid shutoff tubing connectors and built-in over pressure traps.

Additional standard accessories include plastic connection tubing, mounting screws, 3/4 oz. bottle of indicating fluid and instructions. Metric ranges are also available.

OEM Specials - All models of the Dwyer® Mark II molded plastic air velocity meters can be supplied with your logo or special scale in OEM quantities. Consult factory for details.

Product Applications

  • Measure air velocity in ducts
Starting at $85.15
Grouped product items
Model Description Availability* Qty Price
MARK II 27 Molded plastic manometer, range 0-7000 fpm, red fluid, .826 sp. gr., requires Pitot tube *sold separately. 1-3 days*
$85.15
MARK II 27-NIST Molded plastic manometer, range 0-7000 fpm, red fluid, .826 sp. gr., requires Pitot tube (*sold separately), with NIST Calibration certificate. 1-2 Weeks*
$262.10
MARK II 28 Molded plastic manometer, range 0-10,500 fpm, blue fluid, 1.91 sp. gr., requires Pitot tube *sold separately. 1-2 Weeks*
$309.90
MARK II 40-1-AV Molded plastic manometer, range 0-1.1" w.c. & 0-4200 fpm, red fluid, .826 sp. gr., requires Pitot tube sold separately. 1-2 Weeks*
$255.40
MARK II 40-1-AV-NIST Molded plastic manometer, range 0-1.1" w.c. & 0-4200 fpm, red fluid, .826 sp. gr., requires Pitot tube (*sold separately), with NIST Calibration certificate. 1-2 Weeks*
$540.80
MARK II 40-250PA-AV Molded plastic manometer, range 0-260 Pa & 0-21 mps, red fluid, .826 sp. gr., requires Pitot tube sold separately. 1-2 Weeks*
$252.70
MARK II 41-2-AV Molded plastic manometer, range 0-2.5" w.c. & 0-6300 fpm, blue fluid, 1.91 sp. gr., requires Pitot tube sold separately. 1-2 Weeks*
$644.80
MARK II 41-2-AV-NIST Molded plastic manometer, range 0-260 Pa & 0-21 mps, red fluid, .826 sp. gr., requires Pitot tube (*sold separately), with NIST Calibration certificate. 1-2 Weeks*
$955.75
MKII 40-250PA-AV-NIST Molded plastic manometer, range 0-2.5" w.c. & 0-6300 fpm, blue fluid, 1.91 sp. gr., requires Pitot tube (*sold separately), with NIST Calibration certificate. 1-2 Weeks*
$540.80

Features

  • Thick white styrene-acrylonitrile housing is virtually indestructible
  • Moderate overpressures are accommodated by an overflow tank (Model 25) or float operated overflow traps (Model 40)
  • Able to be mounted on any vertical surface

Questions

Question
Is routine maintenance required for a Dwyer red gage fluid type manometer?
Answer
Yes. The zero point should be checked periodically as well as the fluid level. After a year of service, particularly with dirty air, the fluid should be replaced to assure that specific gravity changes are not affecting the accuracy of the reading.
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Model Description Availability* Price
A-101 1 oz dispenser bottle of red gage fluid, .826 sp. gr. 1-3 days*
$10.85
A-102 4 oz bottle of red gage fluid, .826 sp. gr. 1-3 days*
$21.15
A-103 1 pt bottle of red gage fluid, .826 sp. gr. 1-3 days*
$46.95
A-104 1 qt bottle of red gage fluid, .826 sp. gr. 1-3 days*
$88.25
A-110 1 oz dispenser bottle of blue gage fluid, 1.910 sp. gr. 1-3 days*
$203.90
A-220 Clear flexible vinyl tubing, 3/16" ID x 5/16" OD, lengths to 500'; 45 psi maximum pressure @ 73°F. 1-3 days*
$0.50
A-225 Flexible double column plastic tubing, lt. grey, with red color code stripe, 1/8" ID, lengths to 750 ft, per ft. 1-3 days*
$3.95
A-315 Gage connector, shutoff type, for 3/16" rubber tubing. 1-3 days*
$19.10
A-339 Adapter, brass, 1/8" NPT to 3/16" rubber and 1/8" ID plastic tubing. 1-3 days*
$5.55
A-480 Plastic static pressure tip 1-3 days*
$2.15
A-489 4" 303 SS straight static pressure tip with flange, 1/4" hose barb. 1-3 days*
$9.50
A-612 Portable stand 1-3 days*
$51.10
420706-00 Red pointer indicator. 1-2 Weeks*
$2.40
420706-01 Green pointer indicator. 1-2 Weeks*
$2.40