INA3221 Sensor for Arduino 3-Channel Voltage and Current Monitor

Módulo INA3221 para Arduino con conexión I2C y tres sensores integrados

Placa de sensor INA3221 para medición precisa de corriente y voltaje

INA3221 Sensor for Arduino 3-Channel Voltage and Current Monitor

Name: INA3221 Sensor for Arduino 3-Channel Voltage and Current Monitor
Brand: satkit
SKU: 1c080606
Price: 6.15 EUR
Availability: InStock

Brand: satkit

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6.15€

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The INA3221 sensor for Arduino is an advanced breakout board that acts as the successor to the popular INA219 sensor, combining three independent INA219 sensors on a single board. This module measures both voltage and current via the I2C interface, making it easy to integrate into Arduino projects and other microcontroller-based systems.

With three INA219B integrated circuits, the INA3221 sensor is ideal for applications that require simultaneous monitoring of multiple channels, such as solar systems, batteries and other electronic devices that need power control.

Key features

Monitoring of up to three independent voltage and current channels.
Maximum measurable voltage: 26V.
Standard maximum current: 3.2A.
Option to change the shunt resistor (from 0.1 Ohm to 0.01 Ohm) to measure currents up to 32A.
Precision amplifier to measure the voltage across the shunt resistor with 1% tolerance.
Current measurement resolution of 0.8mA.
I2C communication for easy integration with Arduino and other embedded systems.

Typical uses

This module is especially useful for:

Monitoring solar power systems, allowing you to control the voltage and current of solar panels and batteries.
Measuring current consumption in electronic projects and battery-powered devices.
Developing power management systems in Arduino applications.

Compatibility

The INA3221 sensor is compatible with Arduino and other microcontrollers that support I2C communication. Its design allows easy integration into power monitoring and electronic device control systems.

This module is an excellent choice for anyone looking for a precise and compact solution to measure voltage and current across multiple channels at once.

Simultaneous monitoring of 3 voltage and current channels
Maximum measurable voltage of 26V
Standard maximum current of 3.2A, expandable to 32A by changing the resistor
Precision amplifier with 0.1 Ohm shunt resistor (1%)
Current resolution of 0.8mA
I2C communication compatible with Arduino and other microcontrollers
Ideal for solar applications and battery monitoring

Customer Questions & Answers

What are the main advantages of using the INA3221 compared with the INA219 in power monitoring projects?

The INA3221 integrates three independent measurement channels on a single board, allowing you to monitor up to three sources simultaneously (for example, several power rails or a solar setup with panel, battery and load). This saves space, reduces wiring and makes management easier than using three separate INA219 modules. In addition, the INA3221 maintains high resolution and accuracy like the INA219.

Which microcontrollers and logic voltages is the INA3221 compatible with via I2C?

The INA3221 operates over a supply range of 3.0V to 5.5V, with I2C logic levels compatible with both 3.3V and 5V controllers such as Arduino, ESP32, Raspberry Pi and STM32. The I2C bus should typically run at 100 kHz or 400 kHz.

What is the safe operating range for voltage and current, and how does replacing the shunt resistor affect it?

By default, it supports up to 26V on each channel and currents of up to 3.2A with the installed shunt resistor (0.1Ω, 1%). If it is replaced with a 0.01Ω resistor, the current range increases to 32A, but resolution decreases and susceptibility to noise increases. Careful calibration is recommended after replacement, and the heating of the track and the resistor itself should be monitored.

How is the INA3221 best installed for permanent projects or in environments subject to vibration?

For permanent installations, it is advisable to secure the INA3221 board in an enclosure or on a base using plastic or metal standoffs, ensuring good ventilation. In vibration-prone environments, reinforcing solder joints and interconnections, and using cable glands or silicone adhesive on the pins, can reduce failures caused by movement.

What is the INA3221 sensor for Arduino?

It is a module that measures voltage and current on three channels simultaneously via I2C communication, ideal for Arduino projects.

What is the maximum current it can measure?

The sensor measures up to 3.2A with the standard 0.1 Ohm resistor, and up to 32A if it is changed to a 0.01 Ohm resistor.

What applications is this sensor suitable for?

It is ideal for monitoring solar systems, batteries and electronic projects that require power control.

Is it compatible with Arduino?

Yes, it uses I2C communication which is compatible with Arduino and other microcontrollers.

What is the maximum voltage it can measure?

It can measure voltages up to 26V.