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    Current & Voltage Monitors

    Big Bear Instruments offers a wide variety of current monitors and phase/voltage monitors.  The current monitors are used to do just that -monitor current in its necessary application.  Many units can detect over and/or under current too which is important for avoiding an issue with continuous operation of critical industrial machinery. The phase/voltage monitors are designed to protect applications from things like phase loss, under or over voltage, and machine failure.  Sort by manufacturer, series, monitor type, or part number.

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    ATC Diversified Electronics UOA-240-AFA Voltage Monitor

    UOA-240-AFA
    • Drop-Out Voltage: 205-250 VAC
    • Pick-Up Voltage: 215-260 VAC
    • Hysteresis Voltage: 10
    $242.93

    ATC Diversified Electronics UOA-240-AFN Voltage Monitor

    UOA-240-AFN
    • Drop-Out Voltage: 202 VAC
    • Pick-Up Voltage: 210 VAC
    • Hysteresis Voltage: 8
    • Adjustment: Fixed
    $220.84

    ATC Diversified Electronics UOA-240-AKA Voltage Monitor

    UOA-240-AKA
    • Drop-Out Voltage: 205-250 VAC
    • Pick-Up Voltage: 215-260 VAC
    • Hysteresis Voltage: 10
    • Adjustment: Knob
    $220.84

    ATC Diversified Electronics UOA-240-ALA Voltage Monitor

    UOA-240-ALA
    • Drop-Out Voltage: 205-250 VAC
    • Pick-Up Voltage: 215-260 VAC
    • Hysteresis Voltage: 10
    • Adjustment: Locknut
    $242.93

    ATC Diversified Electronics UOA-240-DLA Voltage Monitor

    UOA-240-DLA
    • Drop-Out Voltage: 205-250 VDC
    • Pick-Up Voltage: 215-260 VDC
    • Hysteresis Voltage: 10
    • Adjustment: Locknut
    $276.06

    ATC Diversified Electronics UOA-24-ALA Voltage Monitor

    UOA-24-ALA
    • Drop-Out Voltage: 19-27 VAC
    • Pick-Up Voltage: 21-29 VAC
    • Hysteresis Voltage: 2
    • Adjustment: Locknut
    $276.06

    ATC Diversified Electronics UOA-24-DLA Voltage Monitor

    UOA-24-DLA
    • Drop-Out Voltage: 19-27 VDC
    • Pick-Up Voltage: 21-29 VDC
    • Hysteresis Voltage: 2
    • Adjustment: Locknut
    $220.84

    ATC Diversified Electronics UOA-48-DLA Voltage Monitor

    UOA-48-DLA
    • Drop-Out Voltage: 38-53 VDC
    • Pick-Up Voltage: 40-55 VDC
    • Hysteresis Voltage: 2
    • Adjustment: Locknut
    $276.06

    ATC Diversified Electronics VBA-110-DLA Voltage Monitor

    VBA-110-DLA
    • Nominal Voltage: 110 VDC
    • Pick-up Under Voltage: 85-110
    • Pick-up Over Voltage: 110-135
    • Hysteresis Voltage: 5
    • Adjustments: Locknut
    $434.80

    ATC Diversified Electronics VBA-120-AFN Voltage Monitor

    VBA-120-AFN
    • Nominal Voltage: 120 VAC
    • Pick-up Under Voltage: 108
    • Pick-up Over Voltage: 132
    • Hysteresis Voltage: 0
    • Adjustments: Fixed
    $434.80

    ATC Diversified Electronics VBA-120-ALA Voltage Monitor

    VBA-120-ALA
    • Nominal Voltage: 120 VAC
    • Pick-up Under Voltage: 90-120
    • Pick-up Over Voltage: 120-150
    • Hysteresis Voltage: 5
    • Adjustments: Locknut
    $224.06

    ATC Diversified Electronics VBA-12-DLA Voltage Monitor

    VBA-12-DLA
    • Nominal Voltage: 12 VDC
    • Pick-up Under Voltage: 10-12
    • Pick-up Over Voltage: 12-15
    • Hysteresis Voltage: 1
    • Adjustments: Locknut
    $434.80

    ATC Diversified Electronics VBA-208-AFN Voltage Monitor

    VBA-208-AFN
    • Nominal Voltage: 208 VAC
    • Pick-up Under Voltage: 187
    • Pick-up Over Voltage: 229
    • Hysteresis Voltage: 0
    • Adjustments: Fixed
    $543.50

    ATC Diversified Electronics VBA-208-ALA Voltage Monitor

    VBA-208-ALA
    • Nominal Voltage: 208 VAC
    • Pick-up Under Voltage: 185-208
    • Pick-up Over Voltage: 208-240
    • Hysteresis Voltage: 8
    • Adjustments: Locknut
    $391.14

    ATC Diversified Electronics VBA-220-AFN Voltage Monitor

    VBA-220-AFN
    • Nominal Voltage: 208/240 VAC
    • Pick-up Under Voltage: 198
    • Pick-up Over Voltage: 242
    • Hysteresis Voltage: 0
    • Adjustments: Fixed
    $434.80

    ATC Diversified Electronics VBA-230-AFN Voltage Monitor

    VBA-230-AFN
    • Nominal Voltage: 230 VAC
    • Pick-up Under Voltage: 207
    • Pick-up Over Voltage: 253
    • Hysteresis Voltage: 0
    • Adjustments: Fixed
    $434.00

    ATC Diversified Electronics VBA-240-AFN Voltage Monitor

    VBA-240-AFN
    • Nominal Voltage: 240 VAC
    • Pick-up Under Voltage: 216
    • Pick-up Over Voltage: 264
    • Hysteresis Voltage: 0
    • Adjustments: Fixed
    $520.99

    ATC Diversified Electronics VBA-240-ALA Voltage Monitor

    VBA-240-ALA
    • Nominal Voltage: 240 VAC
    • Pick-up Under Voltage: 200-240
    • Pick-up Over Voltage: 240-270
    • Hysteresis Voltage: 10
    • Adjustments: Locknut
    $342.67

    ATC Diversified Electronics VBA-24-AFN Voltage Monitor

    VBA-24-AFN
    • Nominal Voltage: 24 VAC
    • Pick-up Under Voltage: 21.6
    • Pick-up Over Voltage: 26.4
    • Hysteresis Voltage: 0
    • Adjustments: Fixed
    $434.80

    ATC Diversified Electronics VBA-24-ALA Voltage Monitor

    VBA-24-ALA
    • Nominal Voltage: 24 VAC
    • Pick-up Under Voltage: 19-24
    • Pick-up Over Voltage: 24-29
    • Hysteresis Voltage: 2
    • Adjustments: Locknut
    $292.10
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