This is a soil temperature and moisture sensor designed for agriculture, meteorological and environmental monitoring applications. It is a fully sealed (IP68), can be installed below ground level, with high precision data via an RS485 output. Soil moisture calculation is based on the principle of frequency domain reflection. By measuring the dielectric constant of soil, it can directly and stably reflect the real moisture content (volumetric moisture content) of all kinds of soil. You will need to wire this up to your microcontroller along with a suitable RS485 to TTL/Serial converter (not supplied). Manufacturer code: ZTS-3000-TR-WS-N01 Specifications: Measurement parameters: soil volumetric moisture content; soil temperature Unit of measurement: % (m3 water/m3 soil); °C Moisture Range: 0-100% Temperature range: -40 to 80 °C Working Range: -40 to 80 °C Output Signal: RS485 Protocol: Modbus-RTU protocol, device default address: 01 Supply voltage: 4.5 to 30V DC Supply power: 0.4W (when powered with 12V DC) Stabilization Time: < 1 second Response time: < 1 second Physical parameters: Probe size: 55mm, φ3mm Probe material: 316L stainless steel Sealing materials: ABS Engineering Plastics, epoxy resin, waterproof grade IP rating: IP68 Cable specifications: 2 m More Information: A github repository containing instructions, manufacturer data, wiring diagram and example Arduino code is available here: https://github.com/curiouselectric/mositureSensor A blog post showing set up and operation of the sensor is available here: https://www.re-innovation.co.uk/docs/soil-moisture-sensor-testing/ Warning: Not suitable for under 12 years old. Warning: Sharp points on sensor probes
