Page 3 of catalogue Capacitive sensors Series 26 of Rechner Industrie-Elektronik GmbH

Capacitive sensors - SERIES 26 WITH SEMICIRCULAR ACTIVE AREA
Capacitive Sensors detect metals or non-metals, which exceed a certain capacity by approaching the active area. The higher the dielectric constant is of the material to be detected, the higher is the achievable sensing distance. A further relevant aspect for the sensing distance is the electronic circuit and the assembly of the sensor electrodes. These specific sensor or general brand type physical and electronic differences are the decisive parameters that affect quality and performance, and separate the average capacitive sensor from High Performance Sensors. With this brochure we present you one of our high lights: the series 26 capacitive sensors. The semicircular active area is a clear sign, that this is no common sensor. The special feature of these sensors is not only the semicircular construction, it is especially the high performance circuit and the optimal electrode form and electrode assembly. The series 26 capacitive sensors are suitable for level control of most different products. They are used in the Semiconductor Industry, Chemical Industry and in the Food Industry. Therefore these sensors are available with different process connections, like 1”, M22, Triclamp, with F30 fitting and with modified body sizes for standard plastic pipe fitting systems. There are models for 10...35 V DC and for 20...250 V AC / DC. To complete this range there are models with ATEX certificate for use in areas with danger of explosion, dust zone 20 or gas zone 1. HOUSING MATERIAL The plastic materials used for the housings of the sensors are suitable for applications in the food and pharmaceutical industry: • PTFE (polytetrafluor ethylene) (FDA 21 CFR 177.1550) • PEEK (Polyetheretherketon) (FDA 21 CFR 177.2415) • PP (Polypropylen) (FDA 21 CFR 177.1520) The versions for ambient temperature of +100°C are capable of CIP (Cleaning In Process) up to 121 °C. Cleaning or sterilization is permitted within this temperature range for parts that are in contact with the products. NON FLUSH MOUNTING All sensors shown in this brochure are for non-flush mounting. That means they are designed for applications where the active area of the sensor in in contact with the material to be detected. With this kind of level control the sensor head (active area) is completely immersed into the powder, granulate or liquid. These capacitive sensors are well accepted as sensors that are reliable, and there are a large number of versions to suit many applications in the processing industry and throughout mechanical engineering. Nowadays they are indispensable. For further information about capacitive sensors please take from our main catalogue or from our web site www. rechner-sensors.com.

All specifications are subject to change without notice. (04/2009)

RECHNER Industrie-Elektronik GmbH • Gaußstraße 8-10 • D-68623 Lampertheim • Tel. (0 62 06) 50 07-0 • Fax (0 62 06) 50 07-36 • e-mail: info@rechner-sensors.de • www. rechner-sensors.com

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