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    Calibration Services
    1. DEMO 1
    2. DEMO 2
    3. DEMO 3
    4. DEMO 4
    5. DEMO 5
    Pressure
    1. DEMO 1
    2. DEMO 2
    3. DEMO 3
    4. DEMO 4
    5. DEMO 5
    Air Quality
    1. DEMO 1
    2. DEMO 2
    3. DEMO 3
    4. DEMO 4
    5. DEMO 5
    Air Velocity
    1. DEMO 1
    2. DEMO 2
    3. DEMO 3
    4. DEMO 4
    5. DEMO 5
    Flow
    1. DEMO 1
    2. DEMO 2
    3. DEMO 3
    4. DEMO 4
    5. DEMO 5
    Level
    1. DEMO 1
    2. DEMO 2
    3. DEMO 3
    4. DEMO 4
    5. DEMO 5
    Temperature
    1. DEMO 1
    2. DEMO 2
    3. DEMO 3
    4. DEMO 4
    5. DEMO 5
    Test Equipment
    1. DEMO 1
    2. DEMO 2
    3. DEMO 3
    4. DEMO 4
    5. DEMO 5
    Valves
    1. DEMO 1
    2. DEMO 2
    3. DEMO 3
    4. DEMO 4
    5. DEMO 5
    Miscellaneous
    1. DEMO 1
    2. DEMO 2
    3. DEMO 3
    4. DEMO 4
    5. DEMO 5
    Hazardous Rated
    1. DEMO 1
    2. DEMO 2
    3. DEMO 3
    4. DEMO 4
    5. DEMO 5
    Digital
    Digital portable indicators for the difference between two pressures. They can also be used for single pressure. Dwyer's digital manometers are versatile, handheld, and battery operated manometers. Manometers are useful in a wide variety of applications. Some units are constructed of an extruded aluminum case for exceptional durability.
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    Stationary
    Fluid filled portable and stationary indicators for the difference between two pressures. The inexpensive manometers measure positive, negative and differential pressures. Applications vary for the different types of stationary manometers. Offering the most versatile and useful low cost manometers we know of.
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    • Most Popular
    • Questions
    • Videos

    Most Popular

    Series Mark II
    Series 1221/1222/1223
    Series 475
    Series 1211/1212

    Questions

    Question
    Why doesn't 1 inch on the scale of a 1223-12-D manometer equal 1 inch on a ruler?
    Answer
    The calibration scale on the manometer has been compensated for the specific gravity of red gage fluid which is less than water.
    Related
    Series 1221/1222/1223
    Question
    Since water will not mix with oil, why can't a D-style manometer be used to measure water pressures?
    Answer
    The weight of the water itself is also being measured which results in erroneous readings.
    Related
    Series 1221/1222/1223
    Question
    What are the principle advantages of red gage fluid over water for use in manometers?
    Answer
    Red gage fluid is slow to evaporate, won't freeze, is more readable and produces slightly expanded scales for better reading resolution.
    Related
    Series 420
    Series 100 AV
    Series 1227
    Series 100
    Series 1221/1222/1223
    Question
    Will the water manometers freeze?
    Answer
    Yes, if the temperature drops below 32 degrees Fahrenheit, the fluid in the manometer will freeze. The fluid used in "W/M" style manometers is water-based with a small amount of fluorescent green fluid to enhance the meniscus. The other gage fluids have a lower freezing point, however, it is recommended that the manometers be stored above 32 degrees Fahrenheit.
    Related
    Series 1227
    Series 1230/1235
    Series 1221/1222/1223
    Question
    How does a manometer measure gage and differential pressure?
    Answer
    Manometers simply measure the pressure by indicating the amount of displacement a liquid of known weight undergoes when a force is applied. This concept is best explained through illustrations in our Bulletin D-21 or in our Application Guides on how to use pressure products.
    Related
    Series 476A & 478A

    Videos

    Series 477AV Handheld Digital Manometer
    Hydronic Differential Pressure Manometer
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