Current Sensors
A current sensor is a device that detects and converts current to an easily measurable output voltage, which is proportional to the current through the measured path. There are a wide variety of sensors, and each sensor is suitable for a specific current range and environmental condition. Among these sensors, a current sensing resistor is the most commonly used. It can be considered a current-to-voltage converter, where inserting a resistor into the current path, the current is converted to voltage in a linear way. The technology used by the current sensor is important because different sensors can have different characteristics for a variety of applications.
Current sensors are based on either open or closed loop hall effect technology. A closed-loop sensor has a coil that is actively driven to produce a magnetic field that opposes the field produced by the current being sensed. The hall sensor is used as a null-detecting device, and the output signal is proportional to the current being driven into the coil, which is proportional to the current being measured.
In an open loop current sensor, the magnetic flux created by the primary current is concentrated in a magnetic circuit and measured using a hall device. The output from the hall device is the signal conditioned to provide an exact (instantaneous) representation of the primary current.
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Resources
Featured Articles
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AMR Position and Current Sensing in Motor Control Applications
Circular Vertical Hall Sensor IC Technology Overview
ACS780 & ACS781 High Current Density Fully Integrated Current Sensor Ics
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Manufacturer Part No | Newark Part No. | Manufacturer / Description | Availability | Price for: | Price | Quantity | Sensor Output Type | Product Range | |
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CSLW6B200M
|
62M4099 |
Current Sensor, CSLW Series, Open Loop-200mA to 200mA, Sink, Source Output, 4.5 Vdc to 10.5 Vdc HONEYWELL
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0 + Check Stock & Lead TimesMore stock available week commencing 05/05/25 Products not normally stocked that show available inventory, are in stock up to the quantity displayed. Additional quantities will ship with lead time displayed. Non-Cancelable / Non Returnable |
Each
Non-Cancelable / Non Returnable
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50+ $30.93 100+ $29.24 |
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Sink / Source | - | |
ACS712ELCTR-05B-T
|
27M3644 |
Current Sensor, Hall Effect, 8 mA, 80 kHz, SOIC, 8 Pins, 4.5 V, 5.5 V ALLEGRO MICROSYSTEMS
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No Longer Available |
Each (Supplied on Cut Tape)
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null | - | - | ||
ACS712ELCTR-20A-T
|
31M3133 |
Current Sensor, 10 mA, 80 kHz, SOIC, 8 Pins, 4.5 V, 5.5 V ALLEGRO MICROSYSTEMS
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No Longer Available |
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null | - | - | ||
ACS758LCB-100B-PFF-T
|
04R7132 |
Current Sensor, Linear, 10 mA, PFF, 5 Pins ALLEGRO MICROSYSTEMS
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No Longer Available |
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null | - | - | ||
ACS711KLCTR-12AB-T
|
71T9736 |
Current Sensor, Overcurrent Fault, 4 mA, 100 kHz, -40 C, 125 C, 3 V, 5.5 V RoHS Compliant: Yes ALLEGRO MICROSYSTEMS
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2,984 in stock + Check Stock & Lead Times
UK Stock
Delivery in 2-4 business days from our UK warehouse for in stock items
More stock available week commencing 06/10/25 |
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Delivery in 2-4 business days from our UK warehouse for in stock items
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1+ $3.20 10+ $2.45 100+ $2.30 500+ $1.94 1000+ $1.81 2500+ $1.73 6000+ $1.62 More Pricing... |
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