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Voltage, Current & Loop Calibrators (38 Products)

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  1. Druck 191-129 Mains Adaptor for UPS-III Loop Calibrator
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    Free UK Delivery*
    Druck 191-129 Mains Adaptor for UPS-III Loop Calibrator
    Rating:
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    £102.00 £85.00
    • Universal mains input adaptor
    • For UPS-III loop calibrator
    • Ideal for when batteries run out
    170 Reward Points
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    SKU: 191-129
  2. Extech 412355A Current and Voltage Calibrator Meter - Kit
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    Only 1 in Stock
    Free UK Delivery*
    Extech 412355A Current and Voltage Calibrator/Meter
    Rating:
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    £202.04 £168.37
    • Oyster case with flip-up display is ideal for handheld or benchtop applications
    • Display readings in mA or as a % of the 0 to 24mA range or as mV in voltage ranges
    • Provides adjustable 0 to 24mA and 0 to 10V calibration source
    336 Reward Points
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    SKU: 412355A
  3. Extech 412300A Current Calibrator Meter
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    Free UK Delivery*
    Extech 412300A Current Calibrator/Meter
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    £236.21 £196.84
    • Oyster case with flip-up display is ideal for handheld or benchtop applications
    • Display readings in mA or as a % of the 0 to 24mA range or as mV in voltage ranges
    • Provides 0 to 24mA output displayed as mA or %
    392 Reward Points
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    SKU: 412300A
  4. Time Electronics Loop Simulator And Source Loop Mate 1 0 1 Percent Accuracy
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    Free UK Delivery*
    Time Electronics 7006 Loop Simulator and Source
    Rating:
    93%
    (1)
    £264.00 £220.00
    • 7 set calibration points
    • 0.1% accuracy
    • 0 to 10 V or 4 to 20mA loop
    440 Reward Points
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    SKU: 7006
  5. Martindale TEK300 20mA Loop Calibrator - Kit
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    Lead Time: 1-2 Weeks
    Free UK Delivery*
    Martindale TEK300 20mA Loop Calibrator
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    £275.94 £229.95
    • Three built in modes
    • Overload protection
    • Range of 0 to 20mA
    458 Reward Points
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    SKU: MARTEK300
  6. PRC10 Current Calibrator Kit
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    Free UK Delivery*
    Extech PRC10 Current Calibrator
    Rating:
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    £327.60 £273.00
    • Small size calibrator
    • 0 to 24mA
    • 24V DC power source
    546 Reward Points
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    SKU: PRC10
  7. Sika EC mAV Pocket Loop Calibrator
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    Sika EC mAV 2 Pocket Loop Calibrator
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    £370.80 £309.00
    • Voltage and current loop signal measurement/generation
    • Pocket-sized design for ease of use
    • High accuracy
    618 Reward Points
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    SKU: EC MAV.2
  8. Time Electronics Combined Voltage Current Source Microcal 0 1 Percent Accuracy
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    Lead Time: 1-6 Days
    Free UK Delivery*
    Time Electronics 1030 MicroCal Voltage & Current Source
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    £376.80 £314.00
    • Simulate various signal types
    • Multiple outputs
    • High accuracy
    628 Reward Points
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    SKU: 1030
  9. PRC15 Current and Voltage Calibrator - Kit
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    Lead Time: 1-2 Weeks
    Free UK Delivery*
    Extech PRC15 Current and Voltage Calibrator
    Rating:
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    £380.40 £317.00
    • 0 to 24mA (-25% to 125%)
    • 0 to 20V DC calibration source
    • Measure DC process signals
    634 Reward Points
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    SKU: PRC15
  10. TestSafe RTD Calibrator
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    TestSafe RTD Calibrator
    Rating:
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    £478.80 £399.00
    • Simulate and measure RTD
    • Resistance calculation
    • Various advanced features
    798 Reward Points
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    SKU: TSCALIB2
  11. Fluke 771 Milliamp Process Clamp Meter
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    Lead Time: 1-2 Weeks
    Free UK Delivery*
    Fluke 771 Milliamp Process Clamp Meter
    Rating:
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    £526.80 £439.00
    • Long battery life (40 hours)
    • 0.01 mA resolution
    • backlit dual display
    878 Reward Points
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    SKU: Fluke 771
  12. Time Electronics Dc Voltage And Current Calibrator 0 05 Percent Accuracy
    All Time Electronics Products
    Lead Time: 1-2 Weeks
    Free UK Delivery*
    Time Electronics DC Voltage and Current Calibrator
    Rating:
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    £536.09 £446.74
    • High accuracy of 0.05%
    • Can measure and source current and voltage
    • Portable with its own carrying case
    892 Reward Points
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    SKU: 1044
  13. Fluke 705 Loop Calibrator
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    2 in Stock
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    Fluke 705 Loop Calibrator
    Rating:
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    £607.68 £506.40
    • Source, simulate and measure mA
    • Highly accurate (0.02%) with resolution down to 0.001mA
    • Simultaneous mA and % of span display
    1012 Reward Points
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    SKU: Fluke 705
  14. Time Electronics Voltage Current Loop Calibrator 0 02 Percent Accuracy
    All Time Electronics Products
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    Time Electronics Voltage / Current / Loop Calibrator
    Rating:
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    £630.00 £525.00
    • Works with current and voltage levels
    • Accuracy of 0.02%
    • Suitable for being used by a number of professions
    1050 Reward Points
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    SKU: 1048
  15. Fluke 772 Milliamp Process Clamp Meter Kit
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    4 in Stock
    Free UK Delivery*
    Fluke 772 Milliamp Process Clamp Meter
    Rating:
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    £731.58 £609.65
    • Wide range of ampage
    • 0.2% accuracy
    • Option for linear ramp of 25% steps
    1218 Reward Points
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    SKU: Fluke 772
  16. GE Druck UPS-III Loop Calibrator
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    Only 1 in Stock
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    Druck UPS-III Loop Calibrator
    Rating:
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    £734.40 £612.00
    • Simultaneous percentage and mA readings
    • Extremely high accuracy
    • Portable, pocket-sized design
    1224 Reward Points
    Price Match Guarantee
    SKU: UPS-III
  17. Fluke 707 Loop Calibrator - Kit
    All Fluke Products
    Lead Time: 1-2 Weeks
    Free UK Delivery*
    Fluke 707 Loop Calibrator
    Rating:
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    £767.94 £639.95
    • Simultaneous mA and % span measurements
    • Quick and easy to use
    • For calibration, repair and maintenance of current loops
    1278 Reward Points
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    SKU: Fluke 707
  18. Fluke 709 Precision Loop Calibrator
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    Only 1 in Stock
    Free UK Delivery*
    Fluke 709 Precision Loop Calibrator
    Rating:
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    £827.94 £689.95
    • Portable handheld unit
    • Measure and source voltage or current
    • Power loops
    1378 Reward Points
    Price Match Guarantee
    SKU: FLUKE709
  19. Time Electronics Voltage Current Loop Calibrator 0 01 Percent Accuracy
    All Time Electronics Products
    Free UK Delivery*
    Time Electronics 7005 Voltage, Current & Loop Calibrator
    Rating:
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    £834.00 £695.00
    • Ranges are fully programmable
    • Easy and simple to use – even for first timers
    • Min/Max Recording
    1390 Reward Points
    Price Match Guarantee
    SKU: 7005
  20. Time Electronics Dc Millivolt Source 0 02 Percent Accuracy 1
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    Time Electronics 1006 DC Millivolt Source
    Rating:
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    £834.00 £695.00
    • Accuracy of 0.02%
    • 1V with up to 3 ranges
    • Protection against short circuit and overload
    1390 Reward Points
    Price Match Guarantee
    SKU: 1006
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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 they 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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