Dwyer Instruments MARK II-25 Manometer
The Dwyer Instruments MARK II-25 Manometer is a reliable, professional-grade inclined-vertical manometer designed for high-accuracy pressure monitoring in HVACR systems. Built with a virtually indestructible white styrene-acrylonitrile housing, this 0 to 3" W.C. range instrument utilizes a curved tube design to provide expanded scales with easy-to-read increments at low pressure levels. As a veteran technician knows, the precise ± 3% full-scale accuracy is critical when measuring differential pressure across filter banks or monitoring furnace draft. The unit is optimized for red gage fluid (0.826 s.g.) and features a 10 PSI pressure limit, making it suitable for stationary mounting or portable use with an optional stand. Its leak-proof O-ring seals and molded ABS zero-adjust knob ensure the static pressure readings remain consistent during system balancing or troubleshooting. This molded plastic manometer is a staple for contractors maintaining residential and light commercial air handling units where dependable performance is non-negotiable.
Key Benefits- Enhanced Low-End Resolution: Curved inclined-vertical tube geometry provides superior readability for critical low-pressure air measurements.
- Rugged Construction: Durable styrene-acrylonitrile body and shock-mounted glass level vial withstand rigorous job site conditions.
- Versatile Application: Ideal for monitoring air filter pressure drop, duct velocities, and furnace draft pressures.
- Precise Zeroing: Integrated zero adjust knob and plunger allow for rapid, accurate calibration in the field.
- Comprehensive Kit: Includes 8 feet of double column tubing, mounting hardware, and red/green pointer flags for visual range marking.
How do I properly zero the MARK II-25?
Disconnect all tubing and turn the zero set knob counter-clockwise until it stops, then clockwise three full turns to center the adjustment. Add red gage fluid until it reaches the zero mark, then fine-tune with the knob while ensuring the unit is perfectly level using the built-in vial.
Can this manometer be used for air velocity?
Yes, when paired with a pitot tube, the MARK II-25 can measure air velocity. Ensure the tubing from the total pressure side of the pitot tube connects to the high-pressure port (left) and the static pressure side connects to the low-pressure port (right).
What is the maximum operating temperature?
This plastic manometer has a temperature limit of 140°F (60°C). Exposure to temperatures exceeding this limit can deform the molded housing or impact the specific gravity and reliability of the internal fluid.
This item is not eligible for free shipping.
Disclaimer: While we strive for 100% accuracy, product data and specifications are subject to change. Please contact our team to confirm compatibility or technical details before purchasing.
Original: $70.62
-65%$70.62
$24.72Dwyer Instruments MARK II-25 Manometer
The Dwyer Instruments MARK II-25 Manometer is a reliable, professional-grade inclined-vertical manometer designed for high-accuracy pressure monitoring in HVACR systems. Built with a virtually indestructible white styrene-acrylonitrile housing, this 0 to 3" W.C. range instrument utilizes a curved tube design to provide expanded scales with easy-to-read increments at low pressure levels. As a veteran technician knows, the precise ± 3% full-scale accuracy is critical when measuring differential pressure across filter banks or monitoring furnace draft. The unit is optimized for red gage fluid (0.826 s.g.) and features a 10 PSI pressure limit, making it suitable for stationary mounting or portable use with an optional stand. Its leak-proof O-ring seals and molded ABS zero-adjust knob ensure the static pressure readings remain consistent during system balancing or troubleshooting. This molded plastic manometer is a staple for contractors maintaining residential and light commercial air handling units where dependable performance is non-negotiable.
Key Benefits- Enhanced Low-End Resolution: Curved inclined-vertical tube geometry provides superior readability for critical low-pressure air measurements.
- Rugged Construction: Durable styrene-acrylonitrile body and shock-mounted glass level vial withstand rigorous job site conditions.
- Versatile Application: Ideal for monitoring air filter pressure drop, duct velocities, and furnace draft pressures.
- Precise Zeroing: Integrated zero adjust knob and plunger allow for rapid, accurate calibration in the field.
- Comprehensive Kit: Includes 8 feet of double column tubing, mounting hardware, and red/green pointer flags for visual range marking.
How do I properly zero the MARK II-25?
Disconnect all tubing and turn the zero set knob counter-clockwise until it stops, then clockwise three full turns to center the adjustment. Add red gage fluid until it reaches the zero mark, then fine-tune with the knob while ensuring the unit is perfectly level using the built-in vial.
Can this manometer be used for air velocity?
Yes, when paired with a pitot tube, the MARK II-25 can measure air velocity. Ensure the tubing from the total pressure side of the pitot tube connects to the high-pressure port (left) and the static pressure side connects to the low-pressure port (right).
What is the maximum operating temperature?
This plastic manometer has a temperature limit of 140°F (60°C). Exposure to temperatures exceeding this limit can deform the molded housing or impact the specific gravity and reliability of the internal fluid.
This item is not eligible for free shipping.
Disclaimer: While we strive for 100% accuracy, product data and specifications are subject to change. Please contact our team to confirm compatibility or technical details before purchasing.
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Description
The Dwyer Instruments MARK II-25 Manometer is a reliable, professional-grade inclined-vertical manometer designed for high-accuracy pressure monitoring in HVACR systems. Built with a virtually indestructible white styrene-acrylonitrile housing, this 0 to 3" W.C. range instrument utilizes a curved tube design to provide expanded scales with easy-to-read increments at low pressure levels. As a veteran technician knows, the precise ± 3% full-scale accuracy is critical when measuring differential pressure across filter banks or monitoring furnace draft. The unit is optimized for red gage fluid (0.826 s.g.) and features a 10 PSI pressure limit, making it suitable for stationary mounting or portable use with an optional stand. Its leak-proof O-ring seals and molded ABS zero-adjust knob ensure the static pressure readings remain consistent during system balancing or troubleshooting. This molded plastic manometer is a staple for contractors maintaining residential and light commercial air handling units where dependable performance is non-negotiable.
Key Benefits- Enhanced Low-End Resolution: Curved inclined-vertical tube geometry provides superior readability for critical low-pressure air measurements.
- Rugged Construction: Durable styrene-acrylonitrile body and shock-mounted glass level vial withstand rigorous job site conditions.
- Versatile Application: Ideal for monitoring air filter pressure drop, duct velocities, and furnace draft pressures.
- Precise Zeroing: Integrated zero adjust knob and plunger allow for rapid, accurate calibration in the field.
- Comprehensive Kit: Includes 8 feet of double column tubing, mounting hardware, and red/green pointer flags for visual range marking.
How do I properly zero the MARK II-25?
Disconnect all tubing and turn the zero set knob counter-clockwise until it stops, then clockwise three full turns to center the adjustment. Add red gage fluid until it reaches the zero mark, then fine-tune with the knob while ensuring the unit is perfectly level using the built-in vial.
Can this manometer be used for air velocity?
Yes, when paired with a pitot tube, the MARK II-25 can measure air velocity. Ensure the tubing from the total pressure side of the pitot tube connects to the high-pressure port (left) and the static pressure side connects to the low-pressure port (right).
What is the maximum operating temperature?
This plastic manometer has a temperature limit of 140°F (60°C). Exposure to temperatures exceeding this limit can deform the molded housing or impact the specific gravity and reliability of the internal fluid.
This item is not eligible for free shipping.
Disclaimer: While we strive for 100% accuracy, product data and specifications are subject to change. Please contact our team to confirm compatibility or technical details before purchasing.
