Series Mark II Molded Plastic Manometers

3% Accuracy for Stationary and Portable Applications

SERIES MARK II 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. Included with each Mark II manometer are two tubing connectors for 1/8" pipe or sheet metal ducts, two mounting screws, 1 ounce bottle of indicating fluid, red and green pointer flags and complete instructions.
The Model 25 also includes 8' of flexible double column plastic tubing. Portable operation of the Model 25 is made possible by the use of the optional A-612 portable stand. A short piece of tubing can be slipped over the Model 25 pressure connections to contain the gage fluid in transit.
The Model 40 contains two 4-1/2' lengths of clear plastic tubing, a plastic swing-out stand and leveling screw for portable operation. It also features convenient rapid shutoff pressure connections and integral overpressure safety traps.

Click here, if you require a Safety Data Sheet for the Blue Gage Fluid or the Red Gage Fluid.

Product Applications

  • Paint booths
  • Air velocity measurement
  • Air filter gage

Models & Ordering

Filter By

Model Description Usually Ships Price Order
MARK II 25
Ships: Next Day
Price: $35.25
Molded plastic manometer, range 0-3" w.c., red oil, .826 sp. gr. Next Day $35.25 Order
MARK II 26
Ships: Next Day
Price: $185.00
Molded plastic manometer, range 0-7" w.c., blue oil, 1.91 sp. gr. Next Day $185.00 Order
MARK II 27
Ships: Next Day
Price: $51.50
Molded plastic manometer, range 0-7000 fpm, red oil, .826 sp. gr., requires Pitot tube *sold separately. Next Day $51.50 Order
MARK II 28
Ships: 1-2 Weeks
Price: $190.00
Molded plastic manometer, range 0-10,500 fpm, blue oil, 1.91 sp. gr., requires Pitot tube *sold separately. 1-2 Weeks $190.00 Order
MARK II M-700PA
Ships: Next Day
Price: $35.25
Molded plastic manometer, range 10-0-700 Pa, red oil, .826 sp. gr. Next Day $35.25 Order
MARK II MM-180
Ships: Next Day
Price: $185.00
Molded plastic manometer, range 0-180 mm w.c., blue oil, 1.91 sp. gr. Next Day $185.00 Order
MARK II MM-80
Ships: Next Day
Price: $39.75
Molded plastic manometer, range 0-80 mm w.c., red oil, .826 sp. gr. Next Day $39.75 Order

Specifications

INCLINED/VERTICAL
Accuracy:
±3% FS.
Temperature Limits:
140°F (60°C).
Pressure Limits:
10 psi (70 kPa).
Weight:
1.04 lb (472 g).
Agency Approvals:
Meets the technical requirements of EU Directive 2011/65/EU (RoHS II).

INCLINED
Accuracy:
±3% FS.
Temperature Limits:
150°F (65°C).
Pressure Limits:
15 psi (100 kPa).
Scale Length:
Approx. 8-1/4" (21 cm).
Weight:
1.23 lb (558 g).
Agency Approvals:
Meets the technical requirements of EU Directive 2011/65/EU (RoHS II).

Features

  • Broad ranging in easy to read calibrated increments
  • Gages ideally suited for general measurements and specific air applications
  • Compact, stationary or portable device, make it a simple to use tool for pressure measurement in OEM or user applications

Options

  • OEM Specials - All Dwyer® Mark II Molded Plastic Manometers can be supplied in OEM quantities with your name and special graphics and scale.

Accessories

Model Number Description Usually Ships Price Order
Portable stand. A-612 Portable stand. Next Day $38.25 Order
Air filter kit for Series Mark II. A-606 Air filter kit for Series Mark II. Next Day $33.50 Order
1 oz dispenser bottle of red gage fluid, .826 sp. gr. A-101 1 oz dispenser bottle of red gage fluid, .826 sp. gr. Next Day $7.20 Order
4 oz bottle of red gage fluid, .826 sp. gr. A-102 4 oz bottle of red gage fluid, .826 sp. gr. Next Day $13.75 Order
1 pt bottle of red gage fluid, .826 sp. gr. A-103 1 pt bottle of red gage fluid, .826 sp. gr. Next Day $31.75 Order
1 qt bottle of red gage fluid, .826 sp. gr. A-104 1 qt bottle of red gage fluid, .826 sp. gr. Next Day $59.50 Order
1 oz dispenser bottle of blue gage fluid, 1.910 sp. gr. A-110 1 oz dispenser bottle of blue gage fluid, 1.910 sp. gr. Next Day $135.00 Order
1 pt bottle of blue gage fluid, 1.910 sp. gr. A-111 1 pt bottle of blue gage fluid, 1.910 sp. gr. Consult Factory $1,779.00 Order
4 A-489 4" 303 SS straight static pressure tip with flange. Next Day $6.67 Order
Flexible double column plastic tubing, lt. grey, with red color code stripe, 1/8 A-225 Flexible double column plastic tubing, lt. grey, with red color code stripe, 1/8" ID, lengths to 750 ft, per ft. Next Day $2.99 Order
Gage connector, shutoff type, for 3/16 A-315 Gage connector, shutoff type, for 3/16" rubber tubing. Next Day $13.50 Order
420706-00 Red pointer indicator. 1-2 Weeks $1.20 Order
420706-01 Green pointer indicator. 1-2 Weeks $1.20 Order
Clear flexible vinyl tubing is easily inspected, and is therefore best for test
applications where a possibility of fluid entering the tubing exists. 3/16 A-220 Clear flexible vinyl tubing is easily inspected, and is therefore best for test applications where a possibility of fluid entering the tubing exists. 3/16" ID x 5/16" OD, lengths to 500'; 45 psi maximum pressure @ 73°F. Next Day $0.25 Order
Plastic static pressure tip. A-480 Plastic static pressure tip. Next Day $0.80 Order

Approvals

Drawings

Questions

Question
We have a Dwyer gauge Mark II 25 on a waste oil furnace. Can you tell us how much heat it will withstand if we should get it too close to the heat source or how hot the gauge could get before readings would be incorrect.
Answer
The maximum temperature the Mark II 25 can be exposed to is 140 degrees F since it has many plastic components that cannot withstand direct heat.
Question
Could you confirm the instructions on setting the zero setting on Dwyer Model Mark II 25. I have two different instructions and want to know which one is correct.
Answer
Here is a link to the instruction manual for your model: http://www.dwyer-inst.com/PDF_files/D_58.pdf
The correct steps for zeroing are: Turn the zero set knob counterclockwise until it stops, then turn clockwise 3 full turns. This puts zero in approximately the middle of the travel adjustment in either direction. Remove the fill plug and fill with gage fluid until fluid reaches zero on scale. Minor adjustments can be made to adjust zero by adjusting zero knob. Replace fill plug. If gage is overfilled, remove excess by inserting pipe cleaner through the fill port to blot up excess fluid.

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