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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
    Sight Flow Indicators
    Sight Flow Indicators are local visual indicators of flow rate. Viewing windows at economical prices that are easily replaceable and serviceable.
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    Mass Flowmeters and Controllers
    This category contains sensors that indicate flow rate for low flow systems. The mass flowmeters monitor flow, pressure, and temperature. Some products are programmable.
    Gas Flowmeter Selection Guide
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    Flow Indicators / Controllers
    This category contains remote flow indicators and controllers for use with flow transmitters. Dwyer meters and totalizers display flow rate. The weatherproof, UV resistant, large, dual line display allows for more information, making it easier to read and simpler to program.
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    Flow Transmitters
    Flow Transmitter are sensors with an electrical transmission output for remote indication of flow rate. The different transmitters are Ultrasonic, Paddlewheel: in-line, adjustable and fixed, electromagnetic: adjustable, in-line and fixed, and turbine: in-line. Accessories and Fittings for these flow transmitters are also in this category.
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    Flow Sensors
    This category contains Flow Sensors that measure flow rates. The options are In-Line or Turbine. The In-Line turbines are designed to be inserted in a pipeline through compression fitting. The turbine flow sensors are designed for any pump, pressure or gravity feed system.
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    Flow Switches
    Flow Switch Sensors with an electrical contact output at a specific flow rate have different types of switches, which are paddle, thermal, piezo, and shuttle/piston.
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    Flowmeters
    Flowmeters indicate flow rate. The different sensors include dial, in-line, ultrasonic, orifice plate, totalizing meters, variable area, venturi, or with switch output. The different designs of the flowmeters have a variety of applications.
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    Water Meters
    Water Meters are sensors that indicate flow totalization of water. Available are local and remote inidication models. Dwyer's multi-jet models are economical and dry dials. Each meter applies to different applications. Dwyer water meters are designed for long service life and maintenance-free operation, even under harsh conditions.
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    • Most Popular
    • Questions
    • Videos

    Most Popular

    Series RM
    Series VF
    Series VFC/VFCII
    Series V6

    Questions

    Question
    How are Dwyer flowmeters properly read?
    Answer
    The flow rate is read at the maximum width portion of the float regardless of shape.
    Related
    Series VFC/VFCII
    Series VF
    Series MM
    Series RM
    Question
    What factor is used to correct for different flowmeter inlet pressure?
    Answer
    If the flowmeter is exhausting to atmosphere, no correction factor is needed. If back-pressure is present due to downstream plumbing or restrictions, this error can be corrected utilizing the conversion curves in our full-line catalog or the following equation.

    Pressure: Q2 = Q1 x √((P1 x T2)/(P2 x T1))

    Where:
    Q1 = Observed Flowmeter Reading
    Q2 = Standard Flow Corrected for Specific Gravity
    P1 = Actual Pressure (14.7 psia + Gage Pressure)
    P2 = Standard Pressure (14.7 psia, which is 0 psig)
    T1 = Actual Temperature (460 R + Temp °F)
    T2 = Standard Temperature (530 R, which is 70°F)
    Related
    Series RM
    Series VFC/VFCII
    Series MM
    Series VF
    Question
    Why are top mounted valves recommended for flowmeters used for vacuum service?
    Answer
    To maintain atmospheric pressure in the indicating bore and therefore preserve accuracy; an inlet restriction would reduce pressure in the bore. This is essentially the opposite situation to outlet back-pressure in a pressure system which increases pressure in the bore and also affects accuracy. Remember that all standard Dwyer flowmeters are calibrated for standard atmospheric pressure and temperature in the bore.
    Related
    Series MM
    Series RM
    Question
    Is the Rate-Master® or Visi-Float® Flowmeter compatible with any media?
    Answer
    The Rate-Master® Flowmeter is manufactured from a polycarbonate plastic and the Visi-Float® Flowmeter is manufactured from acrylic. Compatibility charts need to be reviewed to determine if these materials of construction are compatible with your media.
    Related
    Series VF
    Series RM
    Series VFC/VFCII
    Question
    Are special ranges available for the Rate-Master® and/or Visi-Float® Flowmeter?
    Answer
    Yes, other ranges are available which are not specified in our catalog. Please feel free to contact Dwyer with questions on these ranges.
    Related
    Series VFC/VFCII
    Series RM
    Series VF

    Videos

    No Contact! When to Use Gold Contact Switches
    Fix your Flow Specific Gravity and Pressure Corrections for Variable Area Flowmeters (Episode 4)
    Liquid in your Housing? How to Prevent Conduit Condensation
    Variable Area Flowmeters
    Series RM Rate-Master Flowmeter
    Series VFA and VFB Visi-Float Flowmeter
    Water Meters (Series WM2, WMT2, WPT, WMH)
    Flow Measurement with Orifice Plates
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