Selecting the right current sensor is crucial for accurate electrical measurements in various applications, from DIY projects to professional industrial settings. Understanding the key features and specifications will ensure you choose a device that meets your specific needs for safety, efficiency, and reliability.
- Multi-Purpose: M-3050 AC current sensing switch is specially designed and manufactured to solve AC current monitoring. It uses the principle of mutual inductance to sense AC direct current, isolate the AC current, output normally open or normally closed...
- Upgrade: Compared with traditional transformers, thermal protectors and other devices, using this device can not only get more accurate and timely control, but also greatly simplify the design and reduce costs. Self-powered, no external power supply...
- High Performance: The switch has no limit on the number of times of opening and closing, and the response speed reaches the millisecond level. The hysteresis is less than 1% and can be used under strong magnetic conditions. Through structure design...
- LED Indication: The action current is 0-30A AC, which can be adjusted by the potentiometer. The LED indicator light can easily and intuitively indicate the working status of the switch.
- ABS material: High-power MOS tube non-contact electronic switch is used, and the shell is made of self-extinguishing material ABS, which is heat-resistant, acid-alkali-resistant, high impact strength and stable in performance.
- Name: ACS712 current sensor module, current sensor chip: ACS712ELC-05B.
- Pin 5V power supply, built-in power indicator.
- Accuracy range：The module can measure 5A positive and negative current, which corresponds to 185mV/A analog output; IP = 0 A, that is, when no detection current flows, the output voltage is VCC/2.
- Applications: Laster detection and management in the area of electric motors and over -current error protection in the area of switching power supplies and various electronic products.
- Reminder：ACS712 is based on the principle of Hall detection, try to avoid the influence of magnetic fields when using it.
- N.O. Universal Outputs: 2.5A @ 120 VAC/240VAC; In 240V circuit, only one 120V hot line is connected.
- Self-powered, no external power supply required
- Accurate & Dependable: Offers a sensing range of 1 to 50 amps and universal, solid-state outputs; Accuracy: 1%
- Faster Response Time: Once current flow is detected, it closes a set of contacts immidiately; Response Time: ≤200ms
- NOTE: If you want to test the operation of the sensor switch, a load must be applied across the NO contacts; otherwise, it will not work.
- 3pcs ACS712 Hall Effect Current Sensor Module 30A Range ACS712 Current Sensor + 3pcs DC 0-25V Voltage Tester Terminal Sensor Kit for Arduino Current Sensor
- 3pcs ACS712 Hall Effect Current Sensor Module 30A Range ACS712 Current Sensor
- 3pcs DC 0-25V Voltage Tester Terminal Sensor Kit
- [Compatible With:]9-4X:2011,Acadia:2007-2019,Acadia Limited:2017,Allure:2006-2010,ATS:2013-2019,Aura:2008-2009,Avalanche:2007-2013,Bolt EV:2017-2021,Camaro:2010-2015,Canyon:2018-2021,Caprice:2011,Captiva...
- [Compatible With:]G5:2007-2010,G6:2008-2010,Grand Prix:2005-2008,H2:2008-2009,HHR:2006-2011,Impala:2006-2020,Impala Limited:2014-2016,LaCrosse:2006-2016,Lucerne:2006-2011,Malibu:2008-2021,Montana:2005-2008,Monte...
- [Compatible With:]Escalade:2007-2015,Escalade ESV:2008-2015,Escalade EXT:2007-2013,Silverado 1500:2007-2021,Silverado 2500 HD:2020-2021,Silverado 3500 HD:2020-2021,Sonic:2012-2020,Spark:2016-2021,Spark...
- [Replacement Part Number] 13505369/10306471/13502261/25809382
- [Year Warranty]12-Months-Warranty，If you have any questions, please contact us via Amazon Message directly.
- Current sensor chip: ACS712ELC-30A
- Pin 5V power supply, on-board power indicator
- The module can measure the positive and negative 20 amps, corresponding to the analog output 100mV / A
- There is no the detection current through, the output voltage is VCC / 2
- Accurate & Reliable Measurement：FEARLIE F006 AC current sensing switch offers a precise 0.2-30A sensing range with solid-state output, boasting measurement accuracy better than 1%. It reliably works with any waveform, ensuring stable monitoring for...
- Ultra-Wide Sensing Range：This miniature current switch stands out with a 0.2-50A monitoring range, covering AC, pulse, and triangular waveforms. It faithfully captures instantaneous peak currents and voltages, making it more versatile than standard...
- Rapid Response Time：Equipped with a normally open contact, the F006 current sensing relay closes immediately upon detecting current, with a response time ≤200ms. This fast switching speed enhances safety, providing quick protection and control for...
- Enhanced Safety Features：Leveraging electromagnetic induction, this self-powered current sensor is designed without external power, ensuring high safety. It features wide frequency bandwidth, strong anti-interference capability, and high overload...
- Versatile Industrial Applications：Perfect for substations, variable frequency drives, electroplating, street light monitoring, coal mines, and more. The F006 current switch controls automated equipment, buzzers, relays, and microcontrollers, meeting...
- GM-recommended replacement part for your GM vehicle’s original factory component
- Offering the quality, reliability, and durability of GM OE
- Manufactured to GM OE specification for fit, form, and function
- GM-recommended replacement part for your GM vehicle's original factory component
- Material: Ferrite, Current: 0~100A AC.
- Lead wire length: 1m; two output forms: current output or voltage output (need to add load resistance); cable jack: 3.5 mm (such as headphone jack).
- Wide range of applications: suitable for lighting equipment, AC motors, air compressors, monitoring, current measurement and overcurrent protection.
- Simple design: exquisite and compact, simple and atmospheric, smooth surface, translucent and beautiful, beautiful workmanship, every detail is clearly visible.
- Package includes: 1 x Non-invasive AC Current Sensor.
- INA219 module is an I2C interface with a drift, bi-directional current / power monitor integrated circuit (IC), and further expand the energy-saving electronic products TI camp.
- INA219 I2C Bi-directional DC Current Power Supply Sensor, Working Voltage 3~5V; Footprint: SOT23
- INA219 module small size, low cost, high accuracy. It not only can monitor the voltage drop across a shunt resistor on the sensing shunt supply voltage, but also computing power.
- INA219 can be achieved within the maximum error accuracy of +1% from -40° C to 85° C temperature range, the maximum offset is 100 uV. The high-precision products combine the advantages of 12-bit resolution. This module can be sensed bus voltage range is...
- Appliaction:The module is used for I2C port zero drift / bidirectional current / power monitoring sensor module. The device is available in a SOT23 package, providing a small digital current sensing servers, laptops, power supplies, battery management and...
This article is part of our complete guide Electronics & Computing — browse all our comparisons and buying guides.
Last update on 2026-07-07 / Affiliate links / Images from Amazon Product Advertising API
How to Choose the Best Current Sensors
Understanding Current Sensor Types
Current sensors primarily fall into two categories: Hall effect sensors and current transformers (CTs). Hall effect sensors measure the magnetic field generated by the current flowing through a conductor, offering non-contact measurement and isolation. They are suitable for both AC and DC current. Current transformers, on the other hand, are inductive devices that work by stepping down AC current proportionally. They are efficient for high AC currents but cannot measure DC.
Key Specifications to Consider
When choosing a current sensor, several specifications are paramount. Measurement Range dictates the minimum and maximum current the sensor can accurately detect. Accuracy, often expressed as a percentage, indicates how close the sensor's reading is to the actual current. Bandwidth or frequency response is important for AC measurements, determining the range of frequencies the sensor can handle. Output Type (analog voltage, analog current, digital) will influence how the sensor interfaces with your monitoring system.
AC vs. DC Current Measurement
The type of current you need to measure is a fundamental consideration. For alternating current (AC), both Hall effect sensors and current transformers can be used, though CTs are often preferred for high-current AC applications due to their simplicity and efficiency. For direct current (DC), Hall effect sensors are the primary choice, as CTs cannot detect steady DC currents.
Isolation and Safety
Electrical isolation is a critical safety feature, preventing direct electrical contact between the conductor carrying the current and the sensor's circuitry. This protects both the user and the measurement equipment from dangerous voltage spikes. Most Hall effect sensors offer inherent isolation, while CTs also provide a safe, low-impedance secondary winding.
Application-Specific Needs
Consider the environment and specific use case. For high-voltage industrial applications, robust isolation and wide measurement ranges are essential. For hobbyist projects or lower-power electronics, smaller, more cost-effective sensors might suffice. Ensure the sensor's operating temperature range and physical size are compatible with your setup.