Measure Electrical Conductivity in Siemens, Total Dissolved Solids in PPM, and Salinity in PSU and PPT. Monitor hydroponic nutrient levels or salinity in aquariums, pools, and soil.
- Electrical Conductivity in Siemens
- Total Dissolved Solids in PPM
- Salinity in PSU and PPT
What it is
An ATTiny85 programmed as an I2C slave, a DS18B20 waterproof temperature probe, and a two-electrode EC probe. It measures conductance and converts it into a temperature-compensated SI derived unit called a Siemens. From that value, it determines TDS and salinity.
A library is provided to make using the probe easy and there is extensive documentation on the use and setup of the device. The library is available for download and installation in the Arduino Library Manager, PlatformIO Library Manager, and Particle.io IDE. There are also python implementations for Raspberry Pi and MicroPython.
Any 2-electrode probe can be attached to the device, but it is recommended to only use the probes provided by uFire. They are designed to be inexpensive and replaceable after approximately six months to a year of light use. The probe can be kept submerged.