Product card

Multipoint digital temperature sensor type TET-101/Exi- DS18B20

Purpose of multipoint temperature sensor TET-101-DS18B20 with bail type installation as well as flnge or thread type installation is to provide measurement of temperature vertical distribution in grain silos, fodder facilities and bio-gas storage vessels.
Measurement range is in practice limited to -40°C do +125°C. Measurement may be done in up to 64 points, distributed at several depths depending on customer requirements. Temperature detector – integrated circuit DS18B20 (Dallas) features digital serial signal transmission that allows data bus connection via single 2- or 3-wire bus cable; 1 -wire transmission protocol is applied.
Detectors are protected by metal tube or metal reinforced hose assuring high tensile strength. Protecting hose features helical
steel wire construction covered by anti-static plastic sheath. Outer sheath is smooth enough to avoid adhering of product to be
poured into silo. The basic version assures tensile strength up to 700 kN. On customer request an anchor eye is provided at the
end of measuring cable however it may increase material adhering to the measuring cable. Measuring cable is fastened inside
the silo using bail or mounted to the nozzle provided on the silo roof. In case of big silos there are several measuring cables
which distribution as well as position of detectors are modifid according to customer wish. The cables can be connected to
one 1 -wire bus. Connection head is located outside of silo/vessel to easy installation work. In case of small plants bus cable may
be led directly to control room / PC. For hazardous area IS solution signal is connected via Zener barrier that is located in safe
area to electronic module which assures conversion of 1 -wire protocol to RS232/485 bus (protocol MODBUS RTU). For bio-gas
plant vessels sensors In metal protection tubes are more suited than wire measuring cables.

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