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Top rated current sensors

AI-generated summary · updated July 20, 2026 · verify details before purchase.

  1. Allegro MicroSystems ACS712
    Best for beginners ALLEGRO MICROSYSTEMS

    Allegro MicroSystems ACS712

    4.2/5 $3.78

    A cost-effective Hall effect sensor widely used in Arduino and DIY projects for measuring DC and AC current up to 30A.

    • Low cost
    • Easy interface
    • AC and DC support
    • Noisy at low currents
    • Requires calibration
  2. Best for digital precision

    Texas Instruments INA219

    4.8/5 $8 - $12

    A high-precision I2C current and power monitor that measures both shunt voltage drop and bus voltage, ideal for battery projects.

    • I2C digital output
    • Measures voltage and power
    • High accuracy
    • DC only
    • Limited to 26V bus
  3. YHDC SCT-013-000
    Best for AC energy monitoring SazkJere

    YHDC SCT-013-000

    4.7/5 $38.99

    A non-invasive split-core current transformer perfect for measuring AC current in home energy monitoring systems.

    • Non-invasive clip-on
    • Electrically isolated
    • High linearity
    • AC only
    • Requires burden resistor
  4. Allegro MicroSystems ACS758
    Best for high current DC ALLEGRO MICROSYSTEMS

    Allegro MicroSystems ACS758

    4.5/5 $14.71

    A robust Hall effect sensor capable of measuring very high currents up to 200A with low internal resistance.

    • High current capacity
    • Low resistance
    • Isolated output
    • Large footprint
    • Requires external filtering
  5. Best multi-channel sensor

    Texas Instruments INA3221

    4.6/5 $5 - $10

    A triple-channel shunt and bus voltage monitor that allows for simultaneous current measurement on three different power rails.

    • Simultaneous 3-channel
    • I2C interface
    • Independent programmable alerts
    • Complex setup
    • Lower resolution per channel
  6. Best industrial grade

    LEM LA 55-P

    4.6/5 $50 - $70

    A closed-loop Hall effect current transducer offering high precision and electrical isolation for industrial applications.

    • Excellent accuracy
    • High bandwidth
    • Galvanic isolation
    • Expensive
    • Requires external power

Buying advice

When choosing a current sensor, first determine if you need to measure AC or DC current. For safe, non-invasive AC measurements (like home energy monitors), a Current Transformer (CT) is usually the best choice. For DC applications involving microcontrollers, Hall effect sensors are good for general use, while I2C digital sensors like the INA219 offer higher precision and easier data handling. Always ensure the sensor's maximum current rating exceeds your expected load by a safe margin to avoid damage.

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