McMaster-Carr logo
    Forward
    Enter e-mail addresses in the fields below
    Message
    Cancel
    Print
    How can we improve?
    Comments
    E-mail address (if you would like a response)
    18 Products

    Low-Pressure Differential Gauges with U-Tube

    Also known as manometers, these gauges come with indicating liquid that moves up and down two columns—the difference in height between them is your pressure. They are commonly used to indicate clogged filters.
    Brass Connections (Inches of Water)
    Image of Product. Front orientation. Differential Pressure Gauges. Low-Pressure Differential Gauges with U-Tube, Brass Connection.
    Magnet Mount—Magnet-mount gauges can be moved for use in multiple locations.
    Environment
    Temperature Change
    Process
    Temperature Range
    Pressure,
    in. H₂O
    Pressure Scale
    Range
    Pressure Numeric
    Increments, in. H₂O
    Graduations,
    in. H₂O
    Max. Pressure,
    psi
    Ht.
    Min.
    Max.
    Min.
    Max.
    Mount
    Type
    For Use With
    Accuracy
    Each
    Female Compression Tubes for 1/4" ODs
    0 to 84-0-4 In. of H₂O10.110020"Not RatedNot RatedNot RatedNot RatedMagnetAir, Carbon Dioxide, Hydrogen, ArgonNot Rated00000000000000
    0 to 126-0-6 In. of H₂O10.110025"Not RatedNot RatedNot RatedNot RatedMagnetAir, Carbon Dioxide, Hydrogen, ArgonNot Rated0000000000000
    0 to 168-0-8 In. of H₂O10.110030"Not RatedNot RatedNot RatedNot RatedMagnetAir, Carbon Dioxide, Hydrogen, ArgonNot Rated0000000000000
    0 to 2010-0-10 In. of H₂O10.110034"Not RatedNot RatedNot RatedNot RatedMagnetAir, Carbon Dioxide, Hydrogen, ArgonNot Rated0000000000000
    0 to 2412-0-12 In. of H₂O10.110039"Not RatedNot RatedNot RatedNot RatedMagnetAir, Carbon Dioxide, Hydrogen, ArgonNot Rated0000000000000
    0 to 3618-0-18 In. of H₂O10.110058"Not RatedNot RatedNot RatedNot RatedMagnetAir, Carbon Dioxide, Hydrogen, ArgonNot Rated0000000000000
     

    Differential Pressure Sensors

    Image of Product. Front orientation. Differential Pressure Sensors. Style B.
    Image of Product. Front orientation. Contains Annotated. Differential Pressure Sensors. Style E.

    Style B

    Style E

    Use these sensors with differential pressure gauges and switches to measure the static pressure drop across air filters, cooling coils, and blowers in air-handling equipment. Install them in duct through a hole and connect to your gauge with tubing.
    Pressure Tubes—Sensors with pressure tubes give more accurate measurements in applications with high air flow.
    Style
    For Tube
    OD
    Insertion
    Dp.
    Fitting
    Connection
    Gender
    Mount
    Type
    Material
    Features
    Each
    B1/4"—CompressionFemaleScrew OnBrass—0000000000000
    E1/4"4"CompressionFemaleScrew OnBrassPressure Tubes000000000000

    Compression Tube Flow Transmitters for Gases

    Image of Product. Front orientation. Flow Transmitters. Compression Tube Flow Transmitters for Gases.
    Commonly referred to as thermal mass flowmeters, these transmitters calculate flow rate by measuring how much they cool as air and other gases pass through them. This means they’re accurate even if there are temperature and pressure changes, unlike most other transmitters. Used to monitor flow or control equipment, these transmitters, also known as transducers, convert measurements to an electrical signal that is interpreted by receiving devices. As flow increases, the output signal increases. For your receiving device to interpret the signal, you will need to calibrate it for the measurement range and output signal of the transmitter. They only give accurate readings within the rated measurement range. A digital display makes it easy to check the flow rate and adjust settings. Mount these transmitters inline with your system.
    These transmitters are calibrated with air. You can use them with other gases, but they will not be as accurate.
    Voltage Adapters—Voltage adapters are required to connect these transmitters to a power source.
    Flow Transmitters
    Voltage Adapters
    For Tube
    OD
    Flow Range,
    L/min
    End-to-End
    Lg.
    Accuracy
    Max. Pressure
    @ Temp.
    Temp. Range,
    ° F
    Seal Material
    Input Voltage
    Range, V DC
    Mounting
    Position
    Each
    Each
    One 4-20 mA Analog Transmitter Output—2.1 mm Plug End ID Barrel Connection/DB9 Connection Plug
     
    Aluminum Body with Brass Fitting
    1/4"0 to 0.015 1/8"±1.0%1,000 psi @ 70° F32 to 122Viton® Fluoroelastomer
    		12 to 26Horizontal000000000000000000000000000
    1/4"0 to 0.055 1/8"±1.0%1,000 psi @ 70° F32 to 122Viton® Fluoroelastomer
    		12 to 26Horizontal0000000000000000000000000
    1/4"0 to 0.15 1/8"±1.0%1,000 psi @ 70° F32 to 122Viton® Fluoroelastomer
    		12 to 26Horizontal0000000000000000000000000
    1/4"0 to 0.55 1/8"±1.0%1,000 psi @ 70° F32 to 122Viton® Fluoroelastomer
    		12 to 26Horizontal0000000000000000000000000
    1/4"0 to 15 1/8"±1.0%1,000 psi @ 70° F32 to 122Viton® Fluoroelastomer
    		12 to 26Horizontal0000000000000000000000000
    1/4"0 to 55 1/8"±1.0%1,000 psi @ 70° F32 to 122Viton® Fluoroelastomer
    		12 to 26Horizontal0000000000000000000000000
    1/4"0 to 105 1/8"±1.0%1,000 psi @ 70° F32 to 122Viton® Fluoroelastomer
    		12 to 26Horizontal0000000000000000000000000
    1/4"0 to 506 3/16"±1.0%1,000 psi @ 70° F32 to 122Viton® Fluoroelastomer
    		12 to 26Horizontal000000000000000000000000000
    3/8"0 to 1006 1/4"±1.0%1,000 psi @ 70° F32 to 122Viton® Fluoroelastomer
    		12 to 26Horizontal000000000000000000000000000
     
    back to top