Teperature measurement in plastic processing industry
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TEMPERATURE MEASUREMENT IN PLASTICS PROCESSING INDUSTRY

General information on temperature measurement with contact thermometers . . . . . . . . . . . . . . . . . . . . . . . . . . Advantages of thermocouples and resistance thermometers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Basic values of thermoelectric voltage in mV . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Basic values of RTDs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ....

years of experience in temperature measurement and control technique as well as in cable production have made a one man business a company with nearly 500 staff members. Our strength is not only the production of standard products but also the development and manufacturing of special products acc. to customers’ specifications. Every year we manufacture more than 1500 special products on our customers’ request. Every single product is a challenge for our technical team. We at B Bröckskes see ourselves as manufacturer and service provider - in the sense of real partnership and customer...

GENERAL INFORMATION ON TEMPERATURE MEASUREMENT WITH CONTACT THERMOMETERS 1. Temperature as measured variable For nearly all procedures in research and production, temperature is a factor to be considered. It is of considerable importance as measured variable. For temperature measurements, temperature dependent characteristics of materials can be used, as for example the changing electrical resistance (resistance thermometer), the electromagnetic radiation of hot bodies (radiation pyrometer) and resulting thermoelectric voltage (thermocouple). The different electric contact thermometers are...

ADVANTAGES OF THERMOCOUPLES AND RESISTANCE THERMOMETERS can be applied in a much bigger temperature range than resistance thermometers. Resistance thermometers punctual measurement and thus a quicker response time. often cheaper. platinum resistance thermometers are the most accurate sensors and have the best long-time stability. Due to the chemical insensitiveness of the platinum, the risk of impurity by oxidation and other chemical influences is reduced. more robust and less sensitive against mechanical stress. high reproducibility.

BASIC VALUES OF THERMOELECTRIC VOLTAGE IN MV +ECu -CuNi +ECu -CuNi +NiCr -CuNi +NiCrSi -NiSi

temperature range temperature range temperature range Classes 1, 2, and 3 are valid for thermocouples (1) Since April 1994 the standard DIN 43710 is no longer valid

BASIC VALUES OF RTDS

INNER WIRES OF RESISTANCE THERMOMETERS number of percision winding circuit of inner wires 2-wire white white white white black black black black yellow yellow white yellow

COLOUR CODE AND TEMPERATURE RANGE for compensating and extension cables The application temperature range of the cable is limited by the highest application temperature of the insulating material or the application temperature range of the conductor material. In all cases the respective lower figure is valid. The compensating cable for the thermocouple type B can also be manufactured, deviating from the corresponding standards, for a temperature range from 0 to +200°C (S-Type BC-200). Variant colour codes can be manufactured for a minimum order quantity. * The standard 43710 was withdrawn...

HOT RUNNER MINERAL INSULATED THERMOCOUPLE T219 * type L acc. to DIN 43710 The high temperature resistance of the connectype K, T or L* and classes 1 or 2! tion sleeve is highly suitable for the application in hot runner technique. Three standard construction types of the measuring tip are available. This sensor type can be obtained with copper tip, measuring ring or without fix accessories. Without fix accessories the mineral insulated thermocouple is suitable for the placing into a groove considering the diameter. After being deformed, the copper tip is suitable to be cramped under a pipe...

THERMOCOUPLE WITH STAINLESS STEEL SLEEVE T221 * type L acc. to DIN 43710 For the temperature collection at plastics processing machines or similar. The stainless steel wire armouring of the connection cable is used as mechanical protection. Also available in type K, T or L* and classes 1 or 2! THERMOCOUPLE - CLASS 2: q 1 x type K q 1 x type J other thermocouples: MEASURING POINT: q form A, insulated MATERIAL: q 1.4541 NOMINAL LENGTH: BOTTOM SHAPE: q flat OPTIONAL WITH SHEET: q 8 x 15 mm / hole Ø 5 mm TYPE: q with kink protection with fiberglass sleeve CONNECTION CABLE: (see also survey of...

RING THERMOCOUPLE T224 * type L acc. to DIN 43710 For the temperature collection at surfaces. Easy type K, T or L* and classes 1 or 2! mounting with the help of a screw and appropriate for numerous application fields. The stainless steel wire armouring of the connection cable is used as mechanical protection. THERMOCOUPLE - CLASS 2, FORM B: q 1 x type J q 1 x type K q other thermocouples: RING TYPE: q Ø 14 / 4,5 mm CuSn 6 q NOMINAL LENGTH: TYPE: q with kink protection (shrinkable sleeve) q with fiberglass sleeve (shrinkable sleeve) CONNECTION CABLE: (see also survey of connecting cables for...

MOLTEN MASS THERMOCOUPLE T229 * type L acc. to DIN 43710 With the help of this special construction, the type K, T or L* and classes 1 or 2! molten mass temperature in injection nozzles is measured. The surface treated measuring tip is also suitable for application in reinforced plastics. In case of adequate mounting only the nitrated measuring tip is in contact with the molten mass stream. Thus the temperature collection takes place directly in the mass without additional protecting sleeve. other thermocouples: MEASURING POINT: q form B, grounded LIMITING DEVIATION: q class 1 q class 2...

ANGLE THERMOCOUPLE T231 / T233 * type L acc. to DIN 43710 For the temperature collection at plastics protype K, T or L* and classes 1 or 2! cessing machines. It is especially appropriate, whenever a straight cable lead for example due to space reasons is not possible or wanted. The steel wire armouring of the connection cable is used as mechanical protection. Fixing by a clamping screw connection. cable length THERMOCOUPLE - CLASS 2, FORM B: q 1 x type J q 1 x type K q other thermocouples: NOMINAL LENGTH: DIAMETER: q Ø 6,0 mm q Ø 8,0 mm nominal length TYPE: q with kink protection without...