Current Transducers

Current transducers, or current sensors, are an electrical component that detects electric current in a wire and converts it into another type of electrical signal proportional to the current value. The generated signal could be analogue voltage, current or a digital output. This generated signal can be then used to display the measured current in an analogue ammeter, a digital ammeter, or can be used for the purpose of controlling other circuits.

Current Transducer Types
Current sensors can be either open-loop or closed-loop.

  • Open-Loop Sensor: This type measures AC and DC currents and provides electrical isolation between the circuit being measured and the output of the sensor. Open-loop current sensors are generally preferred in battery-powered circuits.
  • Closed-Loop Sensor: The Closed-Loop sensor is sometimes called a ’Zero-Flux’ sensor because it features a Hall-Effect sensor that feeds back an opposing current into a secondary coil, wound on the magnetic core to zero the flux produced in the magnetic core by the primary current. Closed-loop sensors are often used when high accuracy is essential.

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Description Price Sensor Technology Nominal Current Output Current Range Supply Voltage Transformer Type Sensor Type Mounting Type Frequency Bandwidth Accuracy Bore Size Minimum Operating Temperature Series Maximum Operating Temperature Depth
RS Stock No. 181-2129
Mfr. Part No.CSLA2CD
BrandHoneywell
£20.50
Each
Units
Open Loop 0 → 72A - 6 → 12 V dc - Hall Effect PCB Mount - - 10.9mm -25°C CSL +85°C 10.4mm
RS Stock No. 499-5592
Mfr. Part No.APR 50 B10
BrandLEM
£100.22
Each
Units
Closed Loop 50A - 24 V dc - - DIN Rail 30 → 6000 Hz ±1 % 18mm -20°C APR +60°C 55mm
RS Stock No. 499-5570
Mfr. Part No.AP 100 B420L
BrandLEM
£100.22
Each
Units
- 100A 4 → 20mA 12 → 24 V dc - - DIN Rail 30 → 2000 Hz ±1 % 18mm -20°C AP +60°C 55mm
RS Stock No. 207-2912
Mfr. Part No.HTA 400-S
BrandLEM
£51.21
Each
Units
Open Loop ±1000A - 15 V - Hall Effect Panel Mount DC to 50 kHz ±1 % 32mm -25°C HTA +85°C 27.5mm
RS Stock No. 793-4584
Mfr. Part No.HLSR 10-P
BrandLEM
£5.84
Each
Units
Open Loop 25A 10A 4.5 → 5.5 V - Hall Effect PCB Mount 400 kHz ±1 % - -40°C HLSR +105°C 21mm
RS Stock No. 451-1380
Mfr. Part No.LF 505S
BrandLEM
£113.64
Each
Units
Closed Loop 0 → 800A 100mArms 15 → 24 V - Hall Effect Panel Mount DC to 100 kHz ±0.6 % 30.2mm -40°C LF +70°C 40mm
RS Stock No. 198-807
Mfr. Part No.AT 10 B10
BrandLEM
£48.72
Each
Units
- 10A - - - - Cable Tie 50/60 Hz ±1.5 % 16mm -20°C AT +60°C 36.5mm
RS Stock No. 161-4595
Mfr. Part No.CMS2005-SP3
BrandSensitec
£13.862
Each (In a Tray of 50)
Units
- 5A - ±15 V - AMR Effect PCB Mount DC to 200 kHz ±0.8 % - -25°C CMS2000 +85°C 7.3mm
RS Stock No. 763-9790
Mfr. Part No.CMS2005-SP3
BrandSensitec
£15.04
Each
Units
- 5A - ±15 V - AMR Effect PCB Mount DC to 200 kHz ±0.8 % - -25°C CMS2000 +85°C 7.3mm
RS Stock No. 532-9198
Mfr. Part No.HAIS 50-P
BrandLEM
£15.64
Each
Units
Open Loop ±150A - 5 V - Hall Effect PCB Mount DC to 50 kHz ±1 % 15 x 8mm -40°C HAIS +85°C 14mm
RS Stock No. 446-0440
Mfr. Part No.AK 5 B420L
BrandLEM
£279.84
Each
Units
- 5A 4 → 20mA 24 V dc, 150 V ac - - Panel Mount 20 → 100 Hz ±1 % 21.7mm -20°C AK +50°C 30.2mm
RS Stock No. 532-9249
Mfr. Part No.HTFS 400-P/SP2
BrandLEM
£15.58
Each
Units
Open Loop ±600A - 5 V - Hall Effect PCB Mount DC to 50 kHz ±1 % 22mm -40°C HTFS +105°C 17mm
RS Stock No. 521-992
Mfr. Part No.LF 205-S/SP3
BrandLEM
£42.36
Each
Units
Closed Loop 0 → 200A 100mArms 12 → 15 V - Hall Effect Panel Mount DC to 100 kHz ±0.5 % 15.5mm -40°C LF +85°C 26.19mm
RS Stock No. 497-249
Mfr. Part No.CT 0.1P
BrandLEM
£62.67
Each
Units
- ±200 mA - 15 V - Fluxgate PCB Mount 40 → 7000 Hz ±1 % 11mm -20°C CT +85°C 20mm
RS Stock No. 527-8466
Mfr. Part No.DHR 100 C420
BrandLEM
£164.91
Each
Units
Open Loop 100A 4 → 20mA 20 → 50 V dc - Hall Effect Panel Mount DC 20 to 6000 Hz ±1 % 32mm -40°C DHR +70°C 25mm
RS Stock No. 198-829
Mfr. Part No.AT 20 B5
BrandLEM
£48.72
Each
Units
- 20A - - - - Cable Tie 50/60 Hz ±1.5 % 16mm -20°C AT +60°C 36.5mm
RS Stock No. 207-2928
Mfr. Part No.HTA 500-S
BrandLEM
£51.21
Each
Units
Open Loop ±1000A - 15 V - Hall Effect Panel Mount DC to 50 kHz ±1 % 32mm -25°C HTA +85°C 27.5mm
RS Stock No. 198-813
Mfr. Part No.AT 5 B10
BrandLEM
£48.72
Each
Units
- 5A - - - - Cable Tie 50/60 Hz ±1.5 % 16mm -20°C AT +60°C 36.5mm
RS Stock No. 435-8707
Mfr. Part No.HX 10-P/SP2
BrandLEM
£10.58
Each
Units
Open Loop ±30A - 12 → 15 V - Hall Effect PCB Mount 50 kHz ±1 % 1.1mm -25°C HX +85°C 15.4mm
RS Stock No. 731-5270
Mfr. Part No.HTA 600-S
BrandLEM
£46.23
Each
Units
Open Loop 600A - ±15 V - Hall Effect Panel Mount DC to 50 kHz ±1 % 32mm -25°C HTA +85°C 27.5mm
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