empowering creative people

Sensors > Current

INA219 High Side DC Current Sensor Breakout - 26V ±3.2A Max


$16.95 AUD, inc GST
$15.41 AUD, exc GST

More Views

INA219 High Side DC Current Sensor Breakout - 26V ±3.2A Max
16.95 AUD


$16.95 AUD, inc GST
$15.41 AUD, exc GST
4 reviews 0 5 5


  • $6.95 Standard (2-4 days, tracked)
  • $8.95 Express (Overnight*, tracked)
  • $3 Economy Post* (3-7 days, no tracking)
  • FREE Pickup (Newcastle only)

Shipping costs may increase for heavy products or large orders.

Exact shipping can be calculated on the view cart page.

*Conditions apply, see shipping tab below.

This breakout board will solve all your power-monitoring problems. Instead of struggling with two multimeters, you can just use the handy INA219B chip on this breakout to both measure both the high side voltage and DC current draw over I2C with 1% precision.

Most current-measuring devices such as Adafruit's current panel meter are only good for low side measuring. That means that unless you want to get a battery involved, you have to stick the measurement resistor between the target ground and true ground. This can cause problems with circuits since electronics tend to not like it when the ground references change and move with varying current draw. This chip is much smarter - it can handle high side current measuring, up to +26VDC, even though it is powered with 3 or 5V. It will also report back that high side voltage, which is great for tracking battery life or solar panels.

A precision amplifier measures the voltage across the 0.1 ohm, 1% sense resistor. Since the amplifier maximum input difference is ±320mV this means it can measure up to ±3.2 Amps. With the internal 12 bit ADC, the resolution at ±3.2A range is 0.8mA. With the internal gain set at the minimum of div8, the max current is ±400mA and the resolution is 0.1mA. Advanced hackers can remove the 0.1 ohm current sense resistor and replace it with their own to change the range (say a 0.01 ohm to measure up 32 Amps with a resolution of 8mA)

Adafruit include a 6-pin header (so you can easily attach this sensor to a breadboard) as well as a 3.5mm terminal plug so you can easily attach and detach your load. Usage is simple. Power the sensor itself with 3 to 5VDC and connect the two I2C pins up to your microcontroller. Then connect your target power supply to VIN+ and the load to ground to VIN-. Adafruit have an Arduino library right now that will do all the gain, range and math for you - just plug and go! We'll have a more detailed tutorial up shortly.

Technical Details

This product is listed in:

Documentation and Resources:

Product Comments

Customer Reviews

  1. Review by Lewis verified purchaser

    I have found the INA219 a very useful little module, being able to measure voltage and current at the same time it really proved its worth measuring the power consumed from a 9 volt battery powering a NIKI T34 Syringe Driver while carrying out a 24 hour test infusion on my test bench. It gave the proof we needed that the battery should be changed for every patient. (Posted on 23/08/2017)

  2. Review by Paul verified purchaser

    A useful-looking current sensor for monitoring power amplifier current in a radio transmitter. Delivered promptly as expected. Prefer Adafruit products for general component and build quality. (Posted on 25/05/2017)

  3. Review by Matthew verified purchaser

    Adafruit library makes life easy. Works as advertised. (Posted on 5/04/2017)

  4. Review by Alex verified purchaser

    Works great. (Posted on 4/10/2016)

Exact shipping can be calculated on the view cart page (no login required).

We deliver Australia-wide with these options:

  • $3 for Small Items (3-7 days, not tracked, only available on selected small items)
  • $6.95 for Standard Post (2-4 days, tracked)
  • $8.95 for Express Post (Overnight for Australia Post Next Day Network, tracked)
  • Pickup - Free! Only available to customers who live in the Newcastle region (only after we email you to notify your order is ready)

International Orders - the following rates are for New Zealand and will vary for other countries:

  • $11.49 for Pack and Track (3+ days, tracked)
  • $16.50 for Express International (2-5 days, tracked)

If you order lots of gear, the postage amount might increment based on the weight of your order.

Our physical address:

Unit 18, 132 Garden Grove Parade
NSW, 2289

Please checkout our customer service page if you have other frequently asked questions such as "do we do purchase orders" (yes!) or "are prices GST inclusive" (yes they are!). We're here to help - get in touch with us to talk shop.