Conductive Level Rod-Probes NS\/NT
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Detecting liquid levels w with conductive Level Rod-Pr robes e difference between the probe-rod lengths is at least 60 mm. • control of the level in order to permit automatic execution of process opera ations (such as dosing of liquids) • monitoring of the level in order ssible damage to prevent pos (dry-running, heating without sufficient liquid) to the devices (pumps, heate ers) installed in the tanks or to pre event an overflow of the process liquid from the p s q tanks. You can assure the safe control t and monitoring o the liquid of level in your tank by using level rod-probes. Sinc these are ce purely passive d devices, suitable electronic controllers are needed. Level rod-probes operate on principle, which the conductive p means that they can be used only y in electrically co onductive liquids (conductivity >4 S). Encrustation 4 and contaminati in the tank ion normally have no effect on the function of the p probes. The levels of non-conductive or nducting liquids, in which h poorly con level rod-p probes cannot be used, can be con ntrolled and monitored by our floa switches. at ust cess liquids) mu be corrected. In this respect, t there are two different genera tasks: al variations in the levels (due to ese evaporation or removal of the pro- The level r rod-probes are available in many different versions: Possible deposits of encrustation between the tips of the probe can be avoided by ensuring that the d • with two to five rods for deteco Liquid levels in p process and storage tanks need to be measured and monitored, s since unwanted tion of o to four different one levels and without an integrated • with or w t ature sensor. temperat G round ro d A suitable electronic controller applies a low alternating voltage to the prob rods. A current be Level rod-probes NS with terminal casing LC then flows from the electrically s conductive tips of the rods and e through th conductive liquid to he the referen electrode, called the nce In metallic, electrically conductive tanks, no erminal is ground rod is needed if the ground te nected directly to the tank. conn ground rod The electrical circuit d. is closed. I the liquid level drops If below the tip of a probe rod, the related ele ectrical circuit is opened. The electronic controller detects the two states “current” and “no current”. The ground rod must be at least as long as the longest rod. An additional ground rod must be provided for level rod probes th coated wit PTFE-Compound, if ce the distanc between the tips of the minimum and maximum rods The level rod-probes are available wit the small th term minal casing LC (material PP) or LC/L (material PVDF) and the large terminal casing BC (material PP) o BC/L (material PVDF). or Leve rod-probes with terminal casing BC can el g be m mounted onto the edge of the tank by the supp ports HB (PP) or HB/L (PVDF) or o a crosson beam by means of the mounting slee EM or the m y g eve holding sleeve HM. el g Leve rod-probes with terminal casing LC are mounted onto the edge of the tank by the supy ports HL (PP) or HL/L (PVDF), or on c s crossbeams by m means of the holding sleeve ML. In or rder to prevent the rods from touching each other PTFE spacers are fitted on pro r, obes with rod lengt of 300 mm or more. ths GALVATEK S.A.S - 9, rue de la Tour du Mesnil-Renard - 78270 Bonnières, France www.galvatek.com - Tél. 01 30 93 07 57 Fax. 01 30 93 25 04

In order to ensure optimal chemical and thermal resistance, the level rod-probes are made from a variety of materials. Specifications of the standard materials Probe rod material Coating Code letter B Stainless steel (Mat. No. 316 TI) T Titanium (Mat. No. 3.7035) Temp. Sensor material (in case of NT) Overview of available level rod-probes The switching points are determined by the various lengths of the probe rods and can be changed by the customer by cutting the rods to the desired length (not possible in the case of PTFE probe rods). Number of levels to be detected 12 3 4 Number of probe...