Series Mark II Molded Plastic Manometers

3% Accuracy for Stationary and Portable Applications

Dwyer® Mark II series molded manometers are of the inclined and inclined-vertical types. The curved inclined-vertical tube of the Model 25 gage provides higher ranges with more easily read increments at low readings. The Model 25 is excellent for general purpose work. The Model 40 inclined gage provides linear calibration and excellent resolution throughout its range. The Model 40 is ideally suited for air velocity and air filter gage applications. Both gage types are capable of pressure measurements above and below atmospheric as well as differential pressure measurements.

Series Mark II Molded Plastic Manometer Model 40-1	Series Mark II Molded Plastic Manometer Model 25	A-612, Portable Stand
A-606, Air filter kit for Series Mark II.	Series Mark II Molded Plastic Manometer, Model Mark II M-700PA

Specifications

Accuracy:: ±3% FS.
Temperature Limits:: Inclined/Vertical Models: 140°F (60°C); Inclined Models: 150°F (65°C).
Pressure Limits:: Inclined/Vertical Models: 10 psi (70 kPa); Inclined Models: 15 psi (100 kPa).
Scale Length:: Inclined Models: Approx. 8-1/4" (21 cm).
Weight:: Inclined/Vertical Models: 1.04 lb (472 g); Inclined Models: 1.23 lb (558 g).

Models & Ordering

Inclined/Vertical

Model Number	Description
MARK II 25	Molded plastic manometer, range 0-3" w.c., red oil, .826 sp. gr.
MARK II 26	Molded plastic manometer, range 0-7" w.c., blue oil, 1.91 sp. gr.
MARK II 27	Molded plastic manometer, range 0-7000 fpm, red oil, .826 sp. gr., requires Pitot tube sold separately.
MARK II 28	Molded plastic manometer, range 0-10,500 fpm, blue oil, 1.91 sp. gr., requires Pitot tube sold separately.
MARK II M-700PA	Molded plastic manometer, range 10-0-700 Pa, red oil, .826 sp. gr.
MARK II MM-180	Molded plastic manometer, range 0-180 mm w.c., blue oil, 1.91 sp. gr.
MARK II MM-80	Molded plastic manometer, range 0-80 mm w.c., red oil, .826 sp. gr.

Inclined

Model Number	Description
MARK II 40-1	Molded plastic manometer, range .1-0-1.0" w.c., red oil, .826 sp. gr.
MARK II 40-1-AV	Molded plastic manometer, range 0-1.1" w.c. & 0-4200 fpm, red oil, .826 sp. gr., requires Pitot tube sold separately.
MARK II 40-250PA	Molded plastic manometer, range 10-0-250 Pa, red oil, .826 sp. gr.
MARK II 40-250PA-AV	Molded plastic manometer, range 0-260 Pa & 0-21 mps, red oil, .826 sp. gr., requires Pitot tube sold separately.
MARK II 40-25MM	Molded plastic manometer, range 0-26 mm w.c., red oil, .826 sp. gr.
MARK II 41-2	Molded plastic manometer, range .2-0-2.4" w.c., blue oil, 1.91 sp. gr.
MARK II 41-2-AV	Molded plastic manometer, range 0-2.5" w.c. & 0-6300 fpm, blue oil, 1.91 sp. gr., requires Pitot tube sold separately.
MARK II 41-600PA	Molded plastic manometer, range 20-0-600 Pa, blue oil, 1.91 sp. gr.
MARK II 41-60MM	Molded plastic manometer, range 0-60 mm w.c., blue oil, 1.91 sp. gr.