On/Off Capacitive control is an established and extensively used level control technique. The instrument is composed of an electrode, suitable for the application, and an electronic insert mounted inside a protective housing. The available inserts are adapted to a variety of, on-off transmitters, alarms, pumps control, some with Atex certification for applications in areas with danger of explosion. Various types of process connections are available, threaded, flanged or sanitary types. The CLS9 and CLS5 models are suitable for installation on plastic or fiberglass tanks.