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Current Clamp Adaptors / Current Clamps

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HTFLEX33LE HTFLEX33LE

0 reviews

HT Instruments HTFLEX33LE - Flexible Clamp for AC Current
  • Type (Current Clamp Adaptors: Flexible/Rogowski
  • Maximum Current AC: 3000 A
  • Maximum Conductor Size: 6.85 IN
  • IP Rating: IP65
  • Shipping Weight: 1.5 LBS

Your Price: $325.00

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9661 9661

(1 Review)

Hioki 9661 Clamp On Sensor 500A AC
  • Type (Current Clamp Adaptors: CT
  • Maximum Current AC: 100 A
  • Maximum Conductor Size: 1.81 IN
  • Product Height: 2.25 IN
  • Product Length: 9.50 IN
  • Product Width: 5.50 IN

Your Price: $359.00

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9010-50 9010-50

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Hioki 9010-50 Current Clamp Adaptor, 500A, Jaw Dia 1.81 in., 1kHz
  • Type (Current Clamp Adaptors: CT
  • Maximum Current AC: 500 A
  • Maximum Conductor Size: 1.81 IN
  • Product Weight: 420 GRAMS (0.926 LBSWhat's This?)
  • Product Height: 7.40 IN
  • Product Length: 1.38 IN

Your Price: $264.00

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9018-50 9018-50

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Hioki 9018-50 Clamp On Probe, 500A, 1.81in Jaw Diameter, 3kHz
  • Type (Current Clamp Adaptors: CT
  • Maximum Current AC: 500 A
  • Maximum Conductor Size: 1.81 IN
  • Warranty: 1 YEARS
  • Product Weight: 420 GRAMS (0.926 LBSWhat's This?)
  • Product Height: 7.40 IN

Your Price: $406.00

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9132-50 9132-50

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Hioki 9132-50 Clamp On Adapter, 1000A, 1kHz
  • Type (Current Clamp Adaptors: CT
  • Maximum Current AC: 1000 A
  • Maximum Conductor Size: 3.14 IN
  • Warranty: 1 YEARS
  • Product Weight: 600 GRAMS (1.32 LBSWhat's This?)
  • Product Height: 8.82 IN

Your Price: $285.00

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9272-05 9272-05

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Hioki 9272-05 AC Current Probe
  • Type (Current Clamp Adaptors: CT
  • Maximum Current AC: 200 A
  • Maximum Conductor Size: 1.81 IN
  • Product Weight: 0.44 LBS
  • Product Height: 3.20 IN
  • Product Length: 11.20 IN

Your Price: $605.00

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9290-10 9290-10

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Hioki 9290-10 Clamp On Adapter Up to 1500 Amp
  • Type (Current Clamp Adaptors: CT
  • Maximum Current AC: 1500 A
  • Maximum Conductor Size: 3.15 IN
  • Product Weight: 1.27 LBS
  • Product Height: 7.40 IN
  • Product Length: 1.65 IN

Your Price: $339.00

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9657-10 9657-10

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Hioki 9657-10 AC Leak Sensor 10Amp CT (3169, 3198, 3197)
  • Type (Current Clamp Adaptors: CT
  • Maximum Current AC: 10 A
  • Maximum Conductor Size: 1.57 IN
  • Product Height: 2.20 IN
  • Product Length: 9.20 IN
  • Product Width: 5.50 IN

Your Price: $429.00

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9660 9660

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Hioki 9660 Clamp On Sensor 100A AC
  • Type (Current Clamp Adaptors: CT
  • Maximum Current AC: 100 A
  • Maximum Conductor Size: 0.59 IN
  • Product Weight: 230 GRAMS (0.5071 LBSWhat's This?)
  • Product Height: 5.31 IN
  • Product Length: 0.83 IN

Your Price: $329.00

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9669 9669

0 reviews

Hioki 9669 Clamp On Sensor 1000A AC
  • Type (Current Clamp Adaptors: CT
  • Maximum Current AC: 1000 A
  • Maximum Conductor Size: 3.15 IN
  • Product Weight: 1.30 LBS
  • Product Height: 2.25 IN
  • Product Length: 9.20 IN

Your Price: $515.00

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9675 9675

0 reviews

Hioki 9675 Clamp On Sensor 10Amp
  • Type (Current Clamp Adaptors: CT
  • Maximum Current AC: 10 A
  • Maximum Conductor Size: 1.18 IN
  • Product Weight: 0.35 LBS
  • Country of Origin: Japan

Your Price: $365.00

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9694 9694

(1 Review)

Hioki 9694 Clamp Sensor 5A AC
  • Type (Current Clamp Adaptors: CT
  • Maximum Current AC: 5 A
  • Maximum Conductor Size: 0.59 IN
  • Product Weight: 230 GRAMS (0.5071 LBSWhat's This?)
  • Product Height: 5.31 IN
  • Product Length: 0.83 IN

Your Price: $432.00

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Recommended for you

Current Clamp Adaptors / Current Clamps

Current Clamp Adaptors, or simply Current Clamps, convert measured current signals into a voltage signal suitable for multimeters, oscilloscopes, data recorders and other test instruments

Considerations when buying a clamp adaptor
  • Do not compromise on safety
    Make sure the clamp meter has the correct rating. Check that the design will allow you to use the meter easily while wearing Personal Protective Equipment (PPE). Checkout the convenience of the flexible current clamps utilizing the Rogowski Principle and exciting new wireless models.
     
  • Make sure the clamp meter works where you do
    Check the specifications for the amperage and voltage range you will be working. Also consider the ambient temperature range if you will be working in a hot environment. Is it rated only for indoor use only?
     
  • Consider special features such as:
    • Flexible current clamp adaptors based on the Rogowski Principle
    • Current clamps that draw power from the conductor versus ones requiring batteries
How does a clamp adaptor work?

Clamp meters and adaptors measure this field using one of two technologies. For DC currents, "Hall Effect" is used, while for AC currents "Inductive" technology is used. Hall effect and induction are noncontact technologies based on the principle that for a given current flow, a proportional magnetic field is produced around the current-carrying conductor. Both technologies measure this magnetic field, but with different sensing methods

Hall Effect Technology
The Hall effect sensor consists of three basic components: the core, the Hall effect device, and signal conditioning circuitry. The current conductor passes through a magnetically permeable core that concentrates the conductor's magnetic field. The Hall effect device is carefully mounted in a small slit in the core, at a right angle to the concentrated magnetic field. A constant current in one plane excites it. When the energized Hall device is exposed to a magnetic field from the core, it produces a potential difference (voltage) that can be measured and amplified.

Inductive Technology
The ability of clamp meters to measure large ac currents is based on simple transformer action. AC current constantly changes potential from positive to negative and back again, generally at the rate of 50 Hz or 60 Hz. The expanding and collapsing magnetic field induces current in the windings. This is the principle that governs all transformers. When you clamp the instrument’s “jaws” around a conductor carrying ac current, that current is coupled through the jaws, similar to the iron core of a power transformer, and into a secondary winding which is connected across the shunt of the meter’s input. A much smaller current is delivered to the meter’s input due to the ratio of the number of secondary windings vs. the number of primary windings wrapped around the core.

Usually, the primary is represented by the one conductor around which the jaws are clamped. If the secondary has 1000 windings, then the secondary current is 1/1000 the current flowing in the primary, or in this case the conductor being measured. Thus, 1 amp of current in the conductor being measured would produce 0.001 amps or 1 milliamp of current at the input of the meter. With this technique, much larger currents can be easily measured by increasing the number of turns in the secondary.

What is the Rogowski Principle used by Flexible Current Clamps?
The flexible and lightweight measuring heads utilizing the Rogowski Principle allow quick and easy installation in hard to reach areas. The Rogowski current clamp is a toroidal coil. The magnetic field produced by the conductor induces a voltage proportional to the rate of change or derivative of the current (oops some calculus). The voltage is then integrated in a circuit (more calculus) to produce a linear voltage suitable for multimeters, oscilloscopes, and recorders.

See a Rogowski Flexible Clamp in action
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