The Gestra NRG 26-21 L=500mm Level Probe is a highly efficient and reliable solution for continuously monitoring levels in steam boilers, hot-water installations, and tanks. With the NRS 2-.. switch and NRR 2-.. controller, it offers precise water level control and MIN/MAX alarms for added safety. Designed for use with a variety of level switches and controllers, it is suitable for both conductive and non-conductive fluids. This electrode uses capacitance measurement to accurately translate the level of fluid in any application.