Float Switches MTS... made of PP, PVDF or Stainless Steel Float switches in connection with our electronics ETS/ENR offer a simple and economical solution for the controlling and monitoring of liquid levels. Alternatively, a switching voltage up to 25V AC/DC from a control system (for example from a PLC) can be connected directly to the float switches. The function of a float switch is based on the moving float and can be guaranteed only in liquids which do not form encrustation. Dirt in the tank (such as chips, adhesive substances) can also block the movement of the float. In such cases, where a float switch cannot be used, we recommend the use of our level rod-probes, providing the liquid is electrically conductive. Contact Float Temperature sensor Float switch with one contact, version PG/ plastics Float switch with one contact and integrated temperature sensor, version LC / plastics The float switches are available in various versions: The stepless height adjustment of the float rod and the easy attachment of the float switch to the container edge is made possible in the plastic version via the holder attached to the float rod. with with with with one switch contact two switch contacts three switch contacts four switch contacts All switch contacts are changeover contacts. As an option, the float switches made of plastic (PP or PVDF) with the terminal casing LC or LC/L with one, two and three switching contacts are also available with integrated temperature sensor (Pt100 in 3-wire-connection). Function A magnet inside the moving float actuates a reed contact mounted in a fixed position within the tube of the float switch. In order to ensure optimal chemical and thermal resistance, the float switches are made of polypropylene (PP), polyvinyliden fluoride (PVDF) and stainless steel (AISI 316Ti). They are available without a terminal casing (version PG) and directly connected cable (length of 1.6 m) or with the terminal casing LC (material PP) or LC/L (material PVDF). The versions with LC terminal casings permit easy connection of the cables. Further mounting options are available on request (e.g. threaded nipples or flanges). The holder of stainless steel level switches is welded and has to be specified with the order. PG version On float switches without a terminal casing and with a permanently connected cable 1.6 m long (other cable lengths to order), the cable enters the tube of the float switch via a cable gland. Degree of protection IP 64 (splash-proof) according to EN 60529. Monitoring of the level in order to prevent possible damage (dry-running, heating without sufficient liquid) to the devices (pumps, heaters) installed in the tanks or to prevent an overflow of the process liquid from the tanks. Controlling of the level to control procedures automatically (such as dosing of liquids). Float-switch tube Nominal length Float-switch tube Nominal length PG-Sealing screw connection Connection cable The measurement of the liquid level is necessary in process containers, storage tanks and galvanising lines, since unwanted variations in these levels (due to evaporation or removal of the liquids) must be corrected. In this respect, a distinction must be made between two general tasks:

Controlling and Monitoring with Safety and Quality 71,5 The small terminal casing LC made of PP or LC/L made of PVDF permits cable connection and has the degree of protection IP65 (jet-waterproof) in accordance with EN60529. If the level switch is exposed to high temperatures (liquid temperature >80°C) or in contact with strong oxidizing chemicals (e.g. chrome electrolytes or HNO3) the PVDF terminal casing LC/L should be used. Stop disc 4th Contact Float-switch tube Float-switch tube Line connection The terminal block for connecting the cable is accessible with the mounting wrench after unscrewing...