KOBOLD’s NTB deep-well probe offers a cost-effective solution for hydrostatic level measuring in wells, reservoirs, clarification plants and other vessels. It is easy to install and is ideally suited for protecting submersible pumps in deep wells. The slim 22 mm diameter model is perfect for tight applications. The immersion probe consists of a measuring cell, two-wire transmitter and a special cable with capillary tube. The housing is constructed of stainless steel with a pressure-sensitive diaphragm protected with a plastic cap. The level signal is determined by comparing the pressure difference between the pressure of the water column over the probe and atmospheric pressure that is referenced through the capillary tube. This is converted to a 4-20 mA analog signal by the ceramic cell and integral electronics.