Dear list

I have to monitor a sensor which consumes <=30mA if it works or not (e.g. disconnected cable). My amateur-approach would be, to add a Voltage/Current-bricklet between the PowerSupply and the sensor to check, if there is power-consumption by the sensor.

The fact-sheet of the sensor to be monitored tells me "Power consumption max. without load ≤ 30 mA". The sensor is connected to a 24V PowerSupply.

I tried to understand the fact-sheet of the INA226 used by the Voltage/Current-Bricklet. But I wasn't able to understand, if the above mentioned ≤ 30 mA can be measured.

Question:

• What is your opinion? Is it feasible to measure such small power-consumption by the Voltage/Current-Bricklet?

Looking forward to any ideas and hints.

Cheers. Yvo

The Voltage/Current Bricklet can measure currents with 1 mA accuracy, starting at 1 mA.

As long as the sensor consumes at least 1 mA when active, you should be able to monitor it.

Am 27.6.2025 um 20:55 schrieb MatzeTF:

The Voltage/Current Bricklet can measure currents with 1 mA accuracy, starting at 1 mA.

As long as the sensor consumes at least 1 mA when active, you should be able to monitor it.

Great. Thank you very much for the fast replay. I am able to test it next Tuesday when I am at fieldwork. I will let you know, how it worked.

Am 27.6.2025 um 20:55 schrieb MatzeTF:

The Voltage/Current Bricklet can measure currents with 1 mA accuracy, starting at 1 mA.

As long as the sensor consumes at least 1 mA when active, you should be able to monitor it.

I just tested the Current/Voltage-Bricklet in combination with the sensor:

• Just works perfectly. The resolution and the minimal value of the bricklet allows the monitoring of the sensor.

Cheers. Yvo