Resistance Thermometers
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RESISTANCE THERMOMETERS ■ RESISTANCE THERMOMETER STANDARD Resistance Thermometers are used widely from -200 to +850°C in different processes. Especially at low temperatures, resistance thermometers are preferred since their accuracy is much better than thermocouples. Up to 500°C standard types and between 500 - 850°C special types are used. The maximum temperatures given in the catalogue are in the air where there are not hazardous gases. In different processes, the life of the resistance thermometer will be different according to the corrosive media. Resistance Thermometer element Pt-100 and Ni-100 give resistance values according to DIN standard 43760 Pt-100 and Ni-100 elements have 100 ohms resistance value at 0 °C. Resistance thermometers are manufactured with inset. Resistance thermometer bulb is first installed into the inset metal tube and it is filled with metal oxide powder. Then this inset is inserted into outertube. The advantage of inset is that it can be changed when it is damaged, without interrupting the process. The application for the resistance thermometers, • Tanks, pipes and engines, etc • In gaseous or liquid media, such as air, vapour, gases, water, oil etc.. • Low and high pressure applications • Surface measurements ■ PROTECTING TUBES Protecting tubes should be chosen according to the process. Most common tubes are used to produce resistance thermometers; • Brass • 1.4301 (304 quality stainless steel) • 1.4571 (316 quality stainless steel) For insets, 1.4301 metal tubes are used. ■ DESIGN AND SELECTION In order for the life-time of the resistance thermometer to be as long as possible and the results taken within this period to be relaible, resistance thermometer element, protecting tube and the type should be chosen according to p

B type aluminium cast heads are used for resistance thermometers. Inset is fixed to a ceramic terminal block which in turn is secured into the connection head by two spring loaded screws. Heads are according to DIN43729 standards. The temperature of the aluminium heads are limited with the temperature limits of the extention cables. All kinds of spare parts of resistance thermometers can be ordered by using the selection table in the catalogue. According to the stock level, the spare parts may be delivered from stock or within a certain delivery period. ■ REPAIR Repair of the resistance...

Elimko Resistance Thermometer Coding STANDARD CODE ADDITIONS TO STANDARD CODE Drawing Number 1 Number of elements (single-double) 2 Protecting tube 3 Protecting Tube Diameter 4 Immersion Length 5 Number of Wires * Inset Structure * Element Class * Cable Length * Cable Type * Thread * Head * Element Type * Protecting tube body * Converter * Surface Coating * Flange * Thermowell * Certificate * IN = Manufacturing number Note: IN = Manufacturing number is assigned by Elimko for special cases. STANDARD CODE It is coded with digits and letters containing the drawing number and 5 separate pieces...

3- Protecting tube Diameter (mm) In 3.digit, the material of protecting tube is given by selecting in accordance with the process. 4- Resistance Thermometer length (immersion in cm) It is not written if 2 wires exit * Inset Structure Z no insets M with insets Note: If no expression is written for inset it means it has standard insets. * Element Class * Cable Length * Cable Type SS Silicon +Silicon CC Fiber Glass+Fiber Glass TT Teflon + Teflon 1NPT ½NPT ¼NPT ⅛NPT 1NPT S Adjustable ... If there is a thread, it is indicated by the letters in the standard. A Type A head B Type B head C1 Type C1...

Elimko Resistance Thermometers