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Conductivity is used to measure drinking water quality, hydroponic nutrient levels, and salinity.

Mod-EC measures conductivity between 0.1 and 10 mS/cm, appropriate for most freshwater applications. measurement not needed

Isolation

Mod-ISO provides galvanic isolation between other probes and helps with environmental interference. Mod-passthrough no isolation

Probes

Lab Conductivity Probe glass and black platinum construction, slightly more accurate than the industrial probe, smaller Industrial Conductivity Probe rugged 316L steel construction, 3/4" NPT threads

pH is used to measure drinking water quality, hydroponics, and pools.

Mod-pH measures pH between 0 and 14 measurement not needed

Isolation

Mod-ISO provides galvanic isolation between other probes and helps with environmental interference. Mod-passthrough no isolation

Probes

Lab ph Probe glass and black platinum construction, slightly more accurate than the industrial probe, smaller Industrial ph Probe rugged construction, 3/4" NPT threads

ORP is used to measure oxidative potential of water. It can be used as a proxy measurement of pool disinfectant levels.

Mod-ORP measures ORP between -2230 and 2230 mV measurement not needed

Isolation

Mod-ISO provides galvanic isolation between other probes and helps with environmental interference. Mod-passthrough no isolation

Probes

Lab ORP Probe glass and black platinum construction, slightly more accurate than the industrial probe, smaller Industrial ORP Probe rugged construction, 3/4" NPT threads

Water temperature is required for accurate conductivity and pH measurements.

Mod-NTC measures temperature using a 10K NTC, accurate to within 0.125 °C DS18B20 Probe measures temperature using a 10K NTC, accurate to within 0.5 °C, housed in a waterproof stainless steel sheath. DS18B20 Thermowell measures temperature using a DS18B20, accurate to within 0.5 °C, housed in a waterproof thermowell with 1/2" NPT threads measurement not needed

Probes

Any 10K NTC Probe

DigiKey

You can use a carrier board to hold the sensor modules and provide all the connections. Or you can use your own custom PCB.

Dual SMA 2 sensor modules with isolated power, SMA probe connections, 3.5mm terminal connections for power and I2C, 1-Wire sensor connection Dual 5mm 2 sensor modules with isolated power, 5mm screw terminals connections, 3.5mm terminal connections for power and I2C None

The following are all the components needed. Each link will open in a new window and provide more detailed information, allow you to add it to the cart, and checkout.

Visit our Embedded CopyPasta 🍝 to automatically generate code for the sensors you've picked.

Pick a template for a platform (AdafruitIO, InfluxDB, Arduino IoT), then pick the sensors you want to use.

Code will be automatically generated to get you started. If you install it locally, it can create a PlatformIO project, download libraries, and do all the environment setup.