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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
    Series 475
    Ranges from 1" w.c. to 150 psid, ±0.5% Accuracy Intrinsically Safe Handheld Digital Manometer measures air and natural gases. Applications include field calibration of other instruments, monitoring or troubleshooting HVAC systems.
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    Series 1227
    0.2" Minor Scale Divisions, Low-Cost Pressure Indication Dual Range Flex-Tube® U-Inclined Manometer where no spirit level is required, the manometer is versatile, and it is useful low-cost. Applications include fan status and filter monitoring.
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    Series 1211/1212
    Safety Traps to Prevent Loss of Fluid Slack Tube® Manometer/Gas Pressure Kit that reads with inch or CM scale. Applications include filter monitoring and duct static pressure.
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    Series 1213
    The “Tube in a Tube” Direct Reading Manometer Gas Pressure Manometer is used with natural gas. Economically priced and made of durable plastic.
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    Series 100
    Suitable for Total Pressures Up to 100 psig, Temperatures Up to 150°F, Accuracy ±2% of Full Scale (1% on Model 115 Only) Durablock® Solid Plastic Portable Gage is a precision instrument in inclined and vertical styles. Used for the measurement of static pressure, vacuum or differential pressure.
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    Series 1221/1222/1223
    Suitable for Pressures up to 100 psi, Better Precision Flex-Tube® U-Tube Manometer read in inches or mm. Scales are high impact polystyrene plastic. Applications include duct static pressure, calibration, and filter monitoring.
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    Series 476A & 478A
    Single & Dual Pressure Measurement, Electronic Zeroing, ±1.5% Accuracy Digital Manometer can be used to measure low pressure. Constructed of extruded aluminum case.
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    Series HM35
    Up to 0.05% Accuracy, Graphical Display, Data Logging Capability Precision Digital Pressure Manometer is designed to measure and log pressure measurements. Ideal for laboratories and calibration facilities.
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    Series 477AV
    Measures Pressure, Flow and Velocity; ±0.5% Accuracy Handheld Digital Manometer are available with pressure, flow, and velocity measurements. Applications include duct static pressure and air flow monitoring.
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    Series 477B
    Precise Air Pressure Measurement, ±0.1% F.S. Accuracy Handheld Digital Manometer is a versatile, hand-held, battery operated manometer. Applications include lab calibration.
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    Series 490W
    Liquid and Gas Pressure Measurement, 2% of Reading Accuracy The easiest to operate and most accurate manometer on the market. Wireless measurement of differential pressure, single pressure and air flow.
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    • Most Popular
    • Questions
    • Videos

    Most Popular

    Series 1221/1222/1223
    Series 475
    Series 1211/1212
    Series 477AV

    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
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