DF Robot KIT0139 Level Sensor

I thought I would share my experience of using the DF robot gravity industrial level sensor (KIT 0139), as there have been a few posts about it.

I’ve connected this to an Arduino MKR1400

I thought I would share my experience of using the DF robot gravity industrial level sensor (KIT 0139), as there have been a few posts about it.

I’ve connected this to an Arduino MKR1400 GSM board via an ADS1115 16-bit ADC.

The results initially were stable enough. I put the sensor in a covered bucket of water (static level) and checked this regularly.

The level readings increased slightly during the day and fell again at night (when the actual water level was static).

The addition of a temperature probe appears to have cured this problem – see attached image.

Adjustment factor = actual depth (mm, measure with tape) – recorded depth (mm, measured with sensor)

This is obviously related to the change in density of water with temperature, but I thought it would be useful to post here for new users of this sensor.

Over the last couple of weeks of lab testing, the sensor has been remarkably stable, particularly considering the cost ~€40

This sensor will be going into a piezometer next week, so fingers crossed!

Have a good weekend

Dave