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475-0T-FM-AV

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 $91.50

Ordering

Grouped product items
Model	Description	Availability*	Price
MARK II 27	Molded plastic manometer, range 0-7000 fpm, red fluid, .826 sp. gr., requires Pitot tube *sold separately.	1-3 days*	$91.50
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*	$280.00
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*	$332.00
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*	$273.00
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*	$578.00
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*	$271.00
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*	$689.00
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*	$1,021.00
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*	$578.00

Features

Support Library

Approvals

Drawings

FAQ

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.

Related

Series 1227

Series Mark II

Series 1230/1235

Series 100

Series 250-AF

Series 420

Series 200 & 300

Series 1221/1222/1223

Series 100 AV

Series 400

Reviews

Accessories

Model	Description	Availability*	Price
A-101	1 oz dispenser bottle of red gage fluid, .826 sp. gr.	1-3 days*	$11.75
A-102	4 oz bottle of red gage fluid, .826 sp. gr.	1-3 days*	$22.70
A-103	1 pt bottle of red gage fluid, .826 sp. gr.	1-3 days*	$50.05
A-104	1 qt bottle of red gage fluid, .826 sp. gr.	1-3 days*	$94.20
A-110	1 oz dispenser bottle of blue gage fluid, 1.910 sp. gr.	1-3 days*	$217.20
A-220	Clear flexible vinyl tubing, 3/16" ID x 5/16" OD, lengths to 500'; 45 psi maximum pressure @ 73°F.	Call for Details*	$0.80
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*	$4.40
A-315	Gage connector, shutoff type, for 3/16" rubber tubing.	1-3 days*	$20.50
A-339	Adapter, brass, 1/8" NPT to 3/16" rubber and 1/8" ID plastic tubing.	1-3 days*	$6.20
A-480	Plastic static pressure tip	1-3 days*	$2.30
A-489	4" 303 SS straight static pressure tip with flange, 1/4" hose barb.	1-3 days*	$10.20
A-612	Portable stand	1-3 days*	$55.00
420706-00	Red pointer indicator.	4-5 Weeks*	$2.80
420706-01	Green pointer indicator.	1-2 Weeks*	$2.80