Monitoring well datalogger type Cera-Diver for measuring and recording groundwater levels/temperatures. Range 100 m, -20 till +80 °C. Memory 48000 measurements. Dimensions 22 x 90 mm. Pressure sensor/housing: ceramic. Accuracy 0,05%/100 m, + 0.1 °C, temperature compensated 0/+40 °C. Warranty 1 years.