Water level logger type TD-Diver for measuring and recording groundwater levels/temperatures. Range 10 m, -20 till +80 °C. Memory 72000 measurements (and 72000 backup). Dimensions 22 x 110 mm. Pressure sensor: ceramic. Housing: stainless steel 316L. Accuracy 0.05%/10 m, + 0,1 °C, temperature compensation 0/+40 °C. Warranty 1 years.