Edu-Logger Data Logger Sensors
- Edu-Lab 900-239, This logger sensor is based on measuring the vacuum pressure in a tensiometer which is a closed tube with a special ceramic part in its end. The tensiometer is filled with water & put in the soil. If the soil is dry, water goes out by diffusion through the ceramic holes & vacuum pressure is created in the tensiometer. When we wet the soil, the vacuum in the tensiometer pulls water in & the vacuum decreases. Edu-Logger Soil Moisture Logger Sensor