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    Handheld Blow-by Flow Meter System | VH563

    On-the-spot testing of piston ring blow-by.
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    At a Glance

    • Operating Pressure: -5 to 30 Psig
    • Outputs: Analogue 0 to 5 Vdc Only
    • Accuracy: ±2% Full Scale
    • Repeatability: ±0.5% of Reading
    • Readout: Rechargeable Batteries
    • Engineering Units: ACFM Only
    • For testing piston ring sealing throughout the full RPM range.
    • Includes a VF563 Flow Meter + Handheld Display
    • The read-out unit supplies power for the flow meter
    • Ideal for ring flutter and ring end gap monitoring.
    • Applications include cylinder wall distortion ring clearance and ring tension.
    • Various inlet and outlet diameters


    The handheld blow-by flow meter system VH563 includes the VF563 in-line flow meter plus a handheld readout. The flow meter measure crankcase blow-by and is attached to the crankcase vent in crankcase ventilation systems. Whilst the handheld readout displays the ACFM (Actual Cubic Feet per Minute) on its LCD screen.

    Applied Measurements are a UK-approved distributor for J-TEC flow meters.

    This system gives a real-time visual readout of the flow being measured. By monitoring blowby flow this system can determine if there are any piston ring failures or leaks.

    The Flow Meter has minimal pressure drop, with minimal restriction to the flow, meaning you are not generating backpressure on the crankcase to get the measurement.

    It is very simple to use. Connect a hose to the in-line of the flow meter that’s connected to the crankcase vent. The real-time blow-by measurements are displayed on the handheld readout.

    Various inlet and outlet diameters are available depending on the size of your engine. From a small 3/8 Inch (9.5mm) up to 1 inch (25.4mm).

    Technical Specifications

    Product Dimensions

    VF563 In-Line Flow Meter Dimensions
    Line Size ID Inches (mm)3/8 (9.5)1/2 (12.7)5/8 (15.9)3/4 (19.05)1 (25.4)1-3/8 (34.9)2 (50.8)
    Range ACFM0.14 to 50.25 to 100.4 to 160.7 to 271 to 502 to 805 to 200
    Range LPM4 to 1417 to 28311.3 to 45320 to 76528 to 141656 to 2265141 to 5663
    Range m3/Hr0.24 to 8.50.42 to 17.7 to 271.2 to 461.7 to 853.4 to 1368.5 to 340
    Range CFH8.4 to 30015 to 60024 to 96042 to 162060 to 3000120 to 4800300 to 12000
    ACFM = Actual Cubic Feet per Minute LPM = Liters Per Minute
    m3/Hr = Cubic Meters per Hour CFH = Cubic Feet per Hour

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