Keller PR-36 XS Narrow Diameter Sensor for groundwater monitoring. Swiss made. It is ideal for accurate groundwater level monitoring in narrow wells due to it’s high accuracy and narrow 16 mm diameter. More importantly the Keller PR-36 XS is compatible with Van Walt telemetry. The sensor is supplied with 30 m of Kevlar Cable and offered by Van Walt with a maximum range of 30 m. Above all the Keller PR-36 XS Narrow Diameter Sensor is accurate and reliable. Certainly it is what you expect from Europe’s leading manufacturer of pressure transducers.