STRAIGHT TYPE THERMOCOUPLES ■ GENERAL In order to prevent the thermocouples element wire from being effected by corrosive gases and increase the life span of the thermocouple, a second ceramic protecting tube is placed inside. Ceramic protecting tubes being used as gas-tight have below given specifications; Straight thermocouples with metal and ceramic protecting tubes are widely used in a variety of processes between –200 °C and 2320 °C The maximum operating temperatures given in the catalogue apply to the air where there are no corrosive gases. EMF characteristics of the thermocouples in this catalog conform to DIN 43710 and IEC 60584 standards. ■ DESIGN AND SELECTION In order to increase the life-span of thermocouples the materials for the thermocouple, element wire insulator, protecting tube and connection head must be selected according to operating conditions. The maximum operating temperatures given in the catalogue apply to the conditions where operating medium is air. Although the exceeding of the maximum temperature limits specified for short periods do not effect the results, they will reduce the life of the thermocouples. Corrosive substances in the process also causes the upper temperature limit to be lower for the protecting tube. Better gas-tight characteristics High heat resistance High aluminium oxide percentage More economical than KER 799 Much better gas-tight characteristics Maximum heat resistance Pure aluminium oxyde pers entage Better and more expensive than KER 610 In L-type thermocouples protecting tubes are connected to the body in two ways. Si-Cr and Si-Ni type of ceramics are connected in TC06 drawing code and the others are in TC07 drawing code. Since the mineral insulated thermocouples have a special structure, they do not have the opportunity to be used with various cases with different alternatives like other thermocouples. The protecting tubes of mineral insulated thermocouples can be inconel or 316 stainless steel. Elimko standards are usually inconel and are used up to 1200°C Thermocouples could be welded with or without grounded at the end point. It is required to give the details at ordering stage. ■ PROTECTING TUBES Protecting tubes must be selected in accordance with the conditions of the process. As a rule, metal protecting tubes are used up to 1200 °C and ceramic tubes are used over 12

Element wires and compensation cables are connected in right polarities to the ceramic terminal in connection head which the thermocouple tubes are fastened A-type large and B-type small heads in standards are used. Connection heads are available having dimensions according to DIN 43729. Metal heads are suitable for a maximum ambient temperature of 200°C. All kinds of spare parts for thermocouples 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 of the thermocouples...

Elimko Straight Thermocouple Coding Drawing Number 1 Numbers of Element (single-double) 2 Type of element 3 Diameter of element wire 4 Protecting tube 5 Diameter of protecting tube 6 Immersion Length * Primer Type * Thread * Head * Element Type * Protecting tube body * Converter * Surface coating * Flange * Thermowell * Certificate * IN = Manufacturing Number TC01 - 1 K 2 N 22 - 50 - PY - G1 - A - T - SB - Tr - TK - F - W - S Drawing Nr. 1 2 3 4 5 STANDARD CODE Note: IN = Manufacturing number is given by Elimko for special case. ADDITIONS TO STANDARD CODE STANDARD CODE It is coded with digits...

5- Protecting tube diameter Note: These dimensions are in mm 14/12 D=14 mm d=12 mm 35 50 71 100 120 In 5. digit, the diameter of the protecting tube is given. The diameter is selected by considering different factors. The diameters given here are standard dimensions. Note: 5. digit has two digits. 6- Thermocuple length (Immersion Length) (cm) * Primer Type A A type head B B type head C1 C1 type head C2 C2 type head P Plastic head SS Stainless head * Element Type * Protecting tube body SB filled materials, perforated PSB Half pipe- half full The protecting tube can be machined from pipe and full...

Elimko Straight Thermocouples The company’s policy is one of continuous product improvement. We reserve the right to modify the information contained herein without notice. 95 /elimkoltdsti /elimkoltdsti /elimkoltdsti