Portable

Portable
Portable manometer test equipment indicates pressure. Applications include filter monitoring, laboratories, fan status, duct static pressure, and field calibration of other instruments. Dwyer's manometers are precision instruments in inclined and vertical styles. Most versatile and useful low cost manometers we know of.
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  1. Series 475 Intrinsically Safe Handheld Digital Manometer
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    Intrinsically Safe Handheld Digital Manometer measures air and natural ...
    Starting at $218.00
  2. Series 1227 Dual Range Flex-Tube® U-Inclined Manometer
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    Dual Range Flex-Tube® U-Inclined Manometer where no spirit level is r ...
    Starting at $161.00
  3. Series 1211/1212 Slack Tube® Manometers
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    Slack Tube® Manometer/Gas Pressure Kit that reads with inch or CM sca ...
    Starting at $137.00
  4. Series 1213 Gas Pressure Manometer
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    Gas Pressure Manometer is used with natural gas. Economically priced ...
    Starting at $58.50
  5. Series 100 Durablock® Solid Plastic Portable Gage
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    Durablock® Solid Plastic Portable Gage is a precision instrument in i ...
    Starting at $602.00
  6. Series 1221/1222/1223 Flex-Tube® U-Tube Manometer
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    Flex-Tube® U-Tube Manometer read in inches or mm. Scales are high imp ...
    Starting at $58.00
  7. Series 476A Single Pressure & Series 478A Digital Manometer
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    Digital Manometer can be used to measure low pressure. Constructed of ...
    Starting at $166.00
  8. SERIES HM35 PRECISION DIGITAL PRESSURE MANOMETER
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    Precision Digital Pressure Manometer is designed to measure and log pr ...
    Starting at $2,238.00
  9. Series 477AV Handheld Digital Manometer
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    Handheld Digital Manometer are available with pressure, flow, and velo ...
    Starting at $217.00
  10. Series 477B Handheld Digital Manometer
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    Handheld Digital Manometer is a versatile, hand-held, battery operated ...
    Starting at $489.00
  11. Series 490W Hydronic Differential Pressure Manometer
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    The easiest to operate and most accurate manometer on the market. Wire ...
    Starting at $3,564.00
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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.
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.
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.
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.
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.