Transformers

We provide current transformers and shunt resistors for the measurement and monitoring of electrical current. Transformers have the ability to transform high voltages to lower output, enabling meters and other instruments to accurately measure currents flowing through a range of equipment. Our shunt resistors are sensors that measure AC or DC currents. The measurements are based on the current’s voltage drop across the resistance. After voltage is measured at the resistor, Ohm’s law can then be used to calculate the actual current measurement. We offer transformers and shunts built by trusted measurement leaders, including Onset Hobo, Red Lion Controls, Monarch Instruments and Meriam.
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  1. Dwyer Instruments SCT20-103
    Dwyer Instruments SCT20-103 Split Core Current Transformer 0-10VDC Output,20/100/150A
    Order #: SCT20-103
    Mfg #: SCT20-103
    Availability: Item ships in about 2 - 3 Weeks
    $82.50
    Split Core Current Transformer 0-10VDC Output,20/100/150A Learn More
  2. Dwyer Instruments SCT10-102
    Dwyer Instruments SCT10-102 Split Core Current Transformer 0-5VDC Output,Range 30/60/120A
    Order #: SCT10-102
    Mfg #: SCT10-102
    Availability: Item ships in about 2 - 3 Weeks
    $82.50
    Split Core Current Transformer 0-5VDC Output,Range 30/60/120A Learn More
  3. Dwyer Instruments SCT10-100
    Dwyer Instruments SCT10-100 Split Core Current Transformer 4-20mA Output,Range 30/60/120A
    Order #: SCT10-100
    Mfg #: SCT10-100
    Availability: Item ships in about 2 - 3 Weeks
    $99.00
    Split Core Current Transformer 4-20mA Output,Range 30/60/120A Learn More
  4. Dwyer Instruments SCT-RLY-24
    Dwyer Instruments SCT-RLY-24 Trigger Voltage Relay Module 24VAC
    Order #: SCT-RLY-24
    Mfg #: SCT-RLY-24
    Availability: Item ships in about 2 - 3 Weeks
    $33.00
    Trigger Voltage Relay Module 24VAC Learn More
  5. Dwyer Instruments SCT-RLY-12
    Dwyer Instruments SCT-RLY-12 Trigger Voltage Relay Module 12VAC
    Order #: SCT-RLY-12
    Mfg #: SCT-RLY-12
    Availability: Item ships in about 2 - 3 Weeks
    $33.00
    Trigger Voltage Relay Module 12VAC Learn More
  6. Dwyer Instruments APT-75-1SB
    Dwyer Instruments APT-75-1SB AC Power Transformer 120 VAC I/P, 75VA, single hub
    Order #: APT-75-1SB
    Mfg #: APT-75-1SB
    Availability: Item ships in about Ships in 2-3 weeks
    $9.50
    AC Power Transformer 120 VAC I/P, 75VA, single hub Learn More
  7. Dwyer Instruments APT-75-1DB
    Dwyer Instruments APT-75-1DB AC Power Transformer 120 VAC I/P, 75VA, dual hub
    Order #: APT-75-1DB
    Mfg #: APT-75-1DB
    Availability: Item ships in about Ships in 2-3 weeks
    $24.25
    AC Power Transformer 120 VAC I/P, 75VA, dual hub Learn More
  8. Dwyer Instruments APT-50-1SN
    Dwyer Instruments APT-50-1SN AC Power Transformer 120 VAC I/P, 50VA, single hub
    Order #: APT-50-1SN
    Mfg #: APT-50-1SN
    Availability: Item ships in about Ships in 2-3 weeks
    $24.75
    AC Power Transformer 120 VAC I/P, 50VA, single hub Learn More
  9. Dwyer Instruments APT-50-1SB
    Dwyer Instruments APT-50-1SB AC Power Transformer 120 VAC I/P, 50VA, single hub
    Order #: APT-50-1SB
    Mfg #: APT-50-1SB
    Availability: Item ships in about Ships in 2-3 weeks
    $13.75
    AC Power Transformer 120 VAC I/P, 50VA, single hub Learn More
  10. Dwyer Instruments APT-50-1DB
    Dwyer Instruments APT-50-1DB AC Power Transformer 120 VAC I/P, 50VA, dual hub
    Order #: APT-50-1DB
    Mfg #: APT-50-1DB
    Availability: Item ships in about Ships in 2-3 weeks
    $21.00
    AC Power Transformer 120 VAC I/P, 50VA, dual hub Learn More
  11. Dwyer Instruments APT-40-3SN
    Dwyer Instruments APT-40-3SN AC Power Transformer 120/208/240/277 VAC I/P, 40VA
    Order #: APT-40-3SN
    Mfg #: APT-40-3SN
    Availability: Item ships in about Ships in 2-3 weeks
    $21.75
    AC Power Transformer 120/208/240/277 VAC I/P, 40VA Learn More
  12. Dwyer Instruments APT-40-1SN
    Dwyer Instruments APT-40-1SN AC Power Transformer 120 VAC I/P, 40VA, single hub
    Order #: APT-40-1SN
    Mfg #: APT-40-1SN
    Availability: Item ships in about Ships in 2-3 weeks
    $14.25
    AC Power Transformer 120 VAC I/P, 40VA, single hub Learn More
  13. Dwyer Instruments APT-40-1DN
    Dwyer Instruments APT-40-1DN AC Power Transformer 120 VAC I/P, 40VA, dual hub
    Order #: APT-40-1DN
    Mfg #: APT-40-1DN
    Availability: Item ships in about Ships in 2-3 weeks
    $13.25
    AC Power Transformer 120 VAC I/P, 40VA, dual hub Learn More
  14. Dwyer Instruments APT-40-0SN
    Dwyer Instruments APT-40-0SN AC Power Transformer 24 VAC I/P, 40VA, single hub
    Order #: APT-40-0SN
    Mfg #: APT-40-0SN
    Availability: Item ships in about Ships in 2-3 weeks
    $13.75
    AC Power Transformer 24 VAC I/P, 40VA, single hub Learn More
  15. Dwyer Instruments APT-100-1SB
    Dwyer Instruments APT-100-1SB AC Power Transformer 120 VAC I/P, 96 VA, single hub
    Order #: APT-100-1SB
    Mfg #: APT-100-1SB
    Availability: Item ships in about Ships in 2-3 weeks
    $13.75
    AC Power Transformer 120 VAC I/P, 96 VA, single hub Learn More
  16. Dwyer Instruments APT-100-1DB
    Dwyer Instruments APT-100-1DB AC Power Transformer 120 VAC I/P, 96 VA, dual hub
    Order #: APT-100-1DB
    Mfg #: APT-100-1DB
    Availability: Item ships in about Ships in 2-3 weeks
    $26.25
    AC Power Transformer 120 VAC I/P, 96 VA, dual hub Learn More
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