Circuit Sensor Flow Meters

The B&G Circuit Sensor Flow Meter is a precision machined wafer-type orifice insert that is installed between standard 125, 150, 250 or 300 psi ANSI flanges, to monitor system flow with a minimum friction head loss. System flow is determined by obtaining a differential pressure across the flow meter orifice by sensing upstream and downstream pressures through the readout valves, then referring to the calibrated nameplate for the corresponding flow.

Manuals -


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  • OP-2 1/2A Circuit Sensor Flow Meter, 2-1/2" View Specs
    • SKU: 117050
    • Brand: Bell & Gossett

    $212.95 / each

    On Backorder Expected to Ship in 3-4 Weeks
  • OP-3A Circuit Sensor Flow Meter, 3" View Specs
    • SKU: 117051
    • Brand: Bell & Gossett

    $239.95 / each

    In Stock at Supplier! (5 Available) Ships in 2-3 Days
  • OP-4A Circuit Sensor Flow Meter, 4" View Specs
    • SKU: 117052
    • Brand: Bell & Gossett

    $272.95 / each

    In Stock at Supplier! (1 Available) Ships in 2-3 Days
  • OP-5A Circuit Sensor Flow Meter, 5" View Specs
    • SKU: OP-5A
    • Brand: Bell & Gossett

    $399.95 / each

    Non-Stock Item Allow 7-10 Days to Ship Out
  • OP-6A Circuit Sensor Flow Meter, 6" View Specs
    • SKU: 117054
    • Brand: Bell & Gossett

    $412.95 / each

    Non-Stock Item Allow 7-10 Days to Ship Out
  • OP-8A Circuit Sensor Flow Meter, 8" View Specs
    • SKU: 117055
    • Brand: Bell & Gossett

    $572.95 / each

    Non-Stock Item Allow 7-10 Days to Ship Out
  • OP-10A Circuit Sensor Flow Meter, 10" View Specs
    • SKU: 117056
    • Brand: Bell & Gossett

    $659.95 / each

    Non-Stock Item Allow 7-10 Days to Ship Out
  • OP-12A Circuit Sensor Flow Meter, 12" View Specs
    • SKU: 117057
    • Brand: Bell & Gossett

    $1,089.95 / each

    Non-Stock Item Allow 7-10 Days to Ship Out