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Current sensors

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Voltage divider 5V/25V for Arduino

A voltage divider is used, when the measured voltage has a larger value than the A/D converter's range. The device works in the range from 0 V to 25 V. The output voltage has a...
5.0 (4)
Index: MOD-08231
Index: MOD-08231
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Module with Hall sensor, magnetic field

Module with Hall sensor, analog magnetic switch. It allows for the detection of the magnetic field. The module has no soldered passive elements. It works with voltage of 5 V.
5.0 (7)
Index: OST-14290
Index: OST-14290
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Module with Hall sensor - Iduino SE014

The module with the Hall sensor, the detection range of the magnetic field is regulated with the potentiometer. It has a built-in digital and analog connector. Powered with the...
5.0 (3)
Index: OST-14293
Index: OST-14293
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DFRobot Gravity v2.1.0 - I2C Digital Wattmeter

A module that allows you to measure electric energy consumption of up to 26 V / 8 A. The maximum measurement error is approx. 0,2%. It communicates through an I2C interface. It...
5.0 (6)
Index: DFR-13753
Index: DFR-13753
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Regular price €8.00 Price €8.00

Grove AC-Voltage sensor - RMS AC voltage sensor - MCP6002 - Seeedstudio 101991032

The sensor is equipped with the MCP6002 system and is designed to measure the rms value of AC voltage . It has adjustable gain for various voltage inputs from 120 V to...
Index: SEE-22416
Index: SEE-22416
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Zamel Supla MEW-01 - WiFi Energy Monitor - Android / iOS application

The monitor allows you to control power consumption via WiFi network. It is a 3-phase device for easy installation in the electrical switchgear, it also enables measurements...
4.9 (11)
Index: ZML-14765
Index: ZML-14765
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ACS711EX current sensor ACS711EX -15A to + 15A - Pololu 2452

Current sensor working in the range of +/-15 A based on the Hall effect. The output is an analog voltage. Supply voltage is from 3.0 V to 5.5 V.
4.3 (2)
Index: PLL-01690
Index: PLL-01690
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Regular price €4.00 Price €4.00

ACS711EX current sensor -31A do +31A - Pololu 2453

Current sensor working in the range of +/- 31 A, based on the Hall effect. The output is an analog voltage. Supply voltage is from 3 V to 5.5 V.
5.0 (2)
Index: PLL-01689
Index: PLL-01689
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Regular price €3.90 Price €3.90

Hall sensor AH49E - Waveshare 9522

Module with Hall sensor with analog and digital output. It works with voltage from 2.3 V to 5.3 V. It provides the detection of a magnetic field.
4.9 (7)
Index: WSR-04494
Index: WSR-04494
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Bidirectional current / power sensor - INA219 - 26V 3,2A - STEMMA AT / Qwiic - Adafruit 904

Bidirectional current and power sensor manufactured by Adafruit. It has an embedded INA219 chip, two STEMMA QT / Qwiic standard connectors located on both sides of the...
Index: ADA-19255
Index: ADA-19255
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Regular price €14.50 Price €14.50

AC current sensor SCT 013-100 - to 100 A

The sensor providing the measurement of alternating current flowing in the pipeline without the need to pull off the isolation. The measurement occurs through the insulation on...
5.0 (1)
Index: OST-14262
Index: OST-14262
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Regular price €8.90 Price €8.90

Grove - Lightning Sensor - AS3935 - Seeedstudio 101021072

The Grove AS3935 sensor is an advanced, easy-to-use sensor that can detect both cloud-to-ground and intra-cloud lightning , up to a 40 km radius. It communicates via the...
Index: SEE-23887
Index: SEE-23887
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Regular price €36.90 Price €36.90
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DFRobot Gravity: Analog AC Current Sensor SCT 013-020 - to 20A

The sensor measures the intensity of the current flowing in a pipeline without its opening. Measurement occurs through the insulation on a single wire, and the output is the...
5.0 (6)
Index: DFR-06932
Index: DFR-06932
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Regular price €22.00 Price €22.00

DFRobot Gravity - voltage divider 1/5

A voltage divider is used, when the measured voltage has a larger value than the range of A/D converter. The device works in the range from 0,0245 V to 25 V. The output...
5.0 (2)
Index: DFR-11261
Index: DFR-11261
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DFRobot Gravity: Analog 20A Current Sensor

Current sensor operating in the range up to 20 A and up to 311 Volts on the basis of the Hall effect. The output is an analog voltage. The supply voltage is 5 V.
4.0 (1)
Index: DFR-08367
Index: DFR-08367
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Regular price €10.90 Price €10.90

Measuring shunt 100A/60mV

The resistor used to measure a maximum current of 100 A . The shunt accuracy class is 0.5. The measuring voltage at 100 A is 60 mV . The operating temperature range is from...
5.0 (2)
Index: AKS-17217
Index: AKS-17217
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Regular price €11.50 Price €11.50

Gravity - analog AC current sensor - up to 10A - DFRobot SEN0288

An analog sensor from DFRobot that measures the AC current flowing in a wire without cutting it. The measurement range is up to 10 A , and the measurement itself is done...
Index: DFR-19898
Index: DFR-19898
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ACS724 current sensor carrier 0A to 5A - Pololu 4048

ACS724 is a sensor that allows measurement of unidirectional current in the range from 0 A to 5 A. It has a low internal current path resistance and offers electrical...
Index: PLL-23634
Index: PLL-23634
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ACS724 current sensor carrier -10A to +10A - Pololu 4043

The ACS724 current sensor is a compact, low-resistance module that is designed to measure current in the range of -10 A to +10 A. Thanks to its built-in electrical...
Index: PLL-23636
Index: PLL-23636
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ACS724 current sensor carrier 0A to 20A - Pololu 4044

The ACS724 sensor is a module offering precise measurement of linear current from 0 A to 20 A in one direction. Thanks to the use of technology based on the Hall effect, it...
Index: PLL-23637
Index: PLL-23637
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AC current sensor SCT 013-030 - up to 30A

The sensor measures the intensity of the current flowing in the cable without its opening. Measurement occurs through the insulation on a single wire, the output is the analog...
4.5 (4)
Index: MOD-04273
Index: MOD-04273
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Gravity: Conductivity Sensor Switch - DFRobot

The module that is able to determine whether the object has an electric conductivity. The maximum detection value is 10 MΩ. After electric conductivity detection, the module...
Index: DFR-08111
Index: DFR-08111
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Regular price €4.00 Price €4.00

Current Sensor ACS723 - 5A current sensor - SparkFun SEN-13679

Current sensor operating in the range from 10 mA to 5 A on the basis of Hall effect. The output is an analog voltage. The supply voltage is 5 V.
5.0 (2)
Index: SPF-12373
Index: SPF-12373
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Measuring shunt 50A/75mV

Measuring by-pass to measure a maximum current of 50 A. The measuring voltage at 50 A is 75 mV. The operating temperature of the resistor is between -20°C and 60°C....
5.0 (1)
Index: AKS-17216
Index: AKS-17216
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Regular price €4.90 Price €4.90

Apart from such important measurable values ​​as voltage, power or current impedance, it is necessary to define the current parameters to describe the phenomena occurring in electrical circuits. These parameters are tested by professional current sensors available in this category. Modern measuring technology enables precise and fast measurement of both direct current and alternating current with regular and irregular waveforms. For this purpose, measuring instruments have been designed which, based on magnetic circuits and semiconductor elements, allow to obtain information about the value of the current flowing in the tested circuit.

The Botland store proposes to buy meters and current flow sensors, which will be ideal elements for building a comprehensive measurement system. They can also come in handy for many other projects!

What is the current sensor? How do electric current sensors work?

Current sensors are commonly used devices. Depending on the type of device, they can act as independent measuring devices or modules that can be added to a given electronic project. In this category you will find many types of current sensors. Devices such as - for example - Grove ACS70331 DC current sensor enable precise measurement of DC / AC � 5 A (direct current and alternating current). The construction of the sensor is based on the giant magnetoresistive (GMR) technology. The sensor measures the current with a basic sensitivity of 200 mV / A. The module is compatible with Arduino and Raspberry Pi. This sensor, as well as many others available in our Botland store, is also used to detect a magnetic field. It uses an integrated, low-resistance primary wire through which the current flows. The modules are compatible with controllers such as Arduino and Raspberry Pi, but they can also work with other parts of programmable electronics.

How to measure electric current?

Before taking any measurement, please read the instructions carefully. When you want to measure the current in an electric circuit, be sure to carefully follow the safety rules to avoid electric shock and damage to the circuit components.

First of all, you must not touch non-insulated circuit elements as they may be live (wrong connection). Secondly, the principle of limited trust towards bystanders and animals should be applied to prevent their unauthorized contact with live parts. If you want to measure the current intensity, disconnect the circuit from the supply voltage and, in the case of circuits with capacitors, wait a few minutes after turning it off to discharge them. Remember to obey all of the specific steps that can be easily found in the manufacturer’s manual.

When connecting the ammeter directly to the circuit, it is necessary to determine for which element you want to measure the current intensity. Then, the measuring system should be connected in series with this element. If the current flowing in the circuit exceeds the allowable measurement range, a voltage divider, inductive current transformer or semiconductor sensor should be then connected. The obtained measurement data can be sent to the analog input in the Arduino or Raspberry Pi electronics. Thanks to this you can implement, for example, overcurrent protection that controls the relay, or a measurement system that monitors electricity consumption.

Current sensors and Hall effect

Some more advanced sensors measure the current using the so-called Hall effect. An excellent example are the sensor modules manufactured by Pololu. With these devices you can monitor the power consumption of receivers and detect the load connected to the network. It is also possible to implement short-circuit and overload protection.

In the case of Pololu sensor modules, the analog output enables the sensor to be connected to the Arduino. Thanks to this, it is possible to read the voltages representing the current in the tested circuit in a very convenient way. Full compatibility with Arduino and other programmable electronics is an advantage for many other reasons as well. If, on the other hand, you want to measure alternating current in many places of the circuit, then a good solution is to use the SCT 013-030 sensor, which allows you to measure sinusoidal alternating current with RMS value up to 30A, without disconnecting the tested circuit.