Mark II Molded Plastic Manometers
3% Accuracy For Stationary And Portable Applications At Minimum Cost
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.
Mark II Model No.25 inclined-vertical manometer
A-612, Portable Stand
Model	Range		Fluid Used
Mark II 25	0-3 in w.c.		Red oil, .826 s.g.
Mark II 26	0-7 in w.c.		Blue oil, 1.91 s.g.
Mark II 27*	0-7000 fpm		Red oil, .826 s.g.
Mark II 28*	0-10,500 fpm		Blue oil, 1.91 s.g.
Mark II MM-80	0-80 mm w.c.		Red oil, .826 s.g.
Mark II MM-180	0-180 mm w.c.		Blue oil, 1.91 s.g.
Mark II M-700PA	10-0-700 Pa		Red oil, .826 s.g.
* Require Pilot tube at additional cost.
SPECIFICATIONS
Accuracy:		+/-3% full scale
Maximum Working Temperature:		140๐F (60๐C)
Maximum Internal Working Pressure:		10 psi (70 kPa)