Voltage, Current & Loop Calibrators

  1. Time Electronics 7006 Loop Simulator and Source
    Time Electronics logo
    Only 1 In Stock
    Time Electronics 7006 Loop Simulator and Source
    (1)
    £298.80 £249.00
    • 7 set calibration points
    • 0.1% accuracy
    • 0 to 10 V or 4 to 20mA loop
    249 Reward Points
    Price Match Guarantee
    7006
  2. Martindale TEK300 20mA Loop Calibrator
    Martindale logo
    Only 1 In Stock
    Free UK Delivery
    Martindale TEK300 20mA Loop Calibrator
    (no reviews)
    £350.40 £292.00
    • Three built in modes
    • Overload protection
    • Range of 0 to 20mA
    292 Reward Points
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    MARTEK300
  3. Extech PRC15 Current and Voltage Calibrator
    Extech logo
    Only 1 In Stock
    Free UK Delivery
    Extech PRC15 Current and Voltage Calibrator
    (no reviews)
    £378.00 £315.00
    • 0 to 24mA (-25% to 125%)
    • 0 to 20V DC calibration source
    • Measure DC process signals
    315 Reward Points
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    PRC15
  4. Fluke 771 Milliamp Process Clamp Meter
    Fluke logo
    In Stock
    Free UK Delivery
    Fluke 771 Milliamp Process Clamp Meter
    (no reviews)
    £702.00 £585.00
    • Long battery life (40 hours)
    • 0.01 mA resolution
    • backlit dual display
    585 Reward Points
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    Fluke 771
  5. Time Electronics 7005 Voltage, Current & Loop Calibrator
    Time Electronics logo
    Only 1 In Stock
    Free UK Delivery
    Time Electronics 7005 Voltage, Current & Loop Calibrator
    (no reviews)
    £898.80 £749.00
    • Ranges are fully programmable
    • Easy and simple to use – even for first timers
    • Min/Max Recording
    749 Reward Points
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    7005
  6. Fluke 705 Loop Calibrator
    Fluke logo
    In Stock
    Free UK Delivery
    Fluke 705 Loop Calibrator
    (no reviews)
    £942.00 £785.00
    • Source, simulate and measure mA
    • Highly accurate (0.02%) with resolution down to 0.001mA
    • Simultaneous mA and % of span display
    785 Reward Points
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    Fluke 705
  7. Fluke 772 Milliamp Process Clamp Meter
    Fluke logo
    In Stock
    Free UK Delivery
    Fluke 772 Milliamp Process Clamp Meter
    (no reviews)
    £1,006.80 £839.00
    • Wide range of ampage
    • 0.2% accuracy
    • Option for linear ramp of 25% steps
    839 Reward Points
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    Fluke 772
  8. Fluke 707 Loop Calibrator
    Fluke logo
    2 In Stock
    Free UK Delivery
    Fluke 707 Loop Calibrator
    (no reviews)
    £1,108.80 £924.00
    • Simultaneous mA and % span measurements
    • Quick and easy to use
    • For calibration, repair and maintenance of current loops
    924 Reward Points
    Price Match Guarantee
    Fluke 707
  9. Fluke 787B Process Meter™
    Fluke logo
    5 In Stock
    Free UK Delivery
    Fluke 787B Process Meter™
    (no reviews)
    £1,266.00 £1,055.00
    • Two in one digital multimeter and mA loop calibrator
    • Compact design
    • Multitude of measurement functions and ability to measure, source and simulate up to 20mA DC
    1055 Reward Points
    Price Match Guarantee
    FLUKE 787B
  10. Fluke 773 Milliamp Process Clamp Meter
    Fluke logo
    In Stock
    Free UK Delivery
    Fluke 773 Milliamp Process Clamp Meter
    (no reviews)
    £1,374.00 £1,145.00
    • Measures mA signals without breaking the loop
    • Best in class with 0.2% accuracy
    • Dual backlit display with mA measurement and percent of 4 - 20 mA span
    1145 Reward Points
    Price Match Guarantee
    FLUKE773
  11. Fluke 789/E ProcessMeter
    Fluke logo
    In Stock
    Free UK Delivery
    Fluke 789/E ProcessMeter
    (no reviews)
    £1,558.80 £1,299.00
    • Loop calibrator and DMM in one tool
    • Built-in HART resistor
    • Full suite of multimeter functions including voltage, current and continuity
    1299 Reward Points
    Price Match Guarantee
    FLUKE789
  12. Fluke 715 Volt/mA Calibrator
    Fluke logo
    Only 1 In Stock
    Free UK Delivery
    Fluke 715 Volt/mA Calibrator
    (no reviews)
    £1,668.00 £1,390.00
    • Calibrate volt and mA sources with the greatest of ease
    • Works with Fluke 80 series digital multimeters
    • Robust, lightweight and easy-to-use
    1390 Reward Points
    Price Match Guarantee
    Fluke 715
  13. Fluke 709 Precision HART Loop Calibrator
    Fluke logo
    2 In Stock
    Free UK Delivery
    Fluke 709 Precision HART Loop Calibrator
    (no reviews)
    £1,798.80 £1,499.00
    • HART communication tool
    • Small, portable and rugged device
    • Versatile range of advanced features
    1499 Reward Points
    Price Match Guarantee
    FLUKE709H

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About Voltage, Current & Loop Calibrators

Also known as current loops, 4-20mA sources are one of the most common methods used in the process industry for transmitting data between sensors and the applications that control and monitor them. The main advantage of a current loop is it can be combined with a huge variety of different sensors to measure temperature, pressure, liquid flow, or light. This data is then compatible with a wide range of different management applications that interoperate with the data and react accordingly.

4-20mA current loops work by taking the results from the sensor and converting it to a proportional current. This means that a zero result causes a 4mA to be transmitted and a 20mA current is sent when the sensor is at full capacity. This information is then sent through copper cables to a receiver at the controller. The controller then decodes the sent signal into the format that is required by the process monitoring application.

The drawback with this method is that over long distances the signal can eventually erode as the voltage begins to wane. An engineer must also be careful when laying these cables to ensure that no electrically noisy systems are located close by, otherwise, they can affect the signal. The main precaution that can be taken is to ensure the use of shielded cabling but this can become too expensive if used over long distances.

To ensure that a current loop is operating effectively engineers often use current calibrators to test the cables and ensure that there are no issues that need resolving no matter what their source.

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