Overview

This document from Manfred Jünemann Mess- und Regeltechnik GmbH provides detailed technical specifications, ordering information, and application guidelines for various thermocouples (types T21 and T22) used in industrial temperature measurement.

1. Application and Service Intended

• Thermocouples are designed for use in general machinery, apparatus, pressure vessels, piping, chemical process technology, and the food industry.
• They are rugged and suitable for harsh industrial environments.

2. Technical Specifications

• Connection Head: Aluminum heads conforming to DIN 43729, Form A or B, with M20 x 1.5 mm cable entry.
• Protection Class: IP54 according to EN 60529.
• Connection Socket: Ceramic material.
• Measuring Insert Tube: Made of Inconel 600 (Ni15Fe), DIN 2.4816.
• Thermowell (Protective Tube): Options include steel grades 1.4841, 1.4749, stainless steel 316Ti, or ceramic materials.
• Measuring Elements (Thermocouples): Types per DIN EN 60584:
  • Fe-CuNi (Type J)
  • NiCr-Ni (Type K)
  • Pt10Rh-Pt (Type S)
  • Pt30Rh-Pt6Rh (Type B)
  • Pt13Rh-Pt (Type R)
• Temperature Ranges: Refer to pages 19.0403 - 19.0405 for detailed ranges per thermocouple type.
• Accuracy Class: Class 2 per DIN EN 60584 with ±2.5°C tolerance.

3. Ordering and Options

• Customers must specify the desired thermocouple type when ordering.
• Optional extras and accessories are detailed on pages 11.3208 - 11.3406.
• Technical information is available from page 19.0401 onward.

4. Product Variants and Dimensions

• Multiple thermocouple designs (T21 and T22) with various thermowell forms (A, B, C, 4) conforming to DIN standards (43729, 43733, 43763, 43764, 43765, 43766, 43767, 43769, 43772, 43734).
• Thermowell materials vary by temperature range: stainless steel 316Ti (1.4571), steel 1.4749 (AISI 446), Inconel 600 for higher temperatures.
• Measuring insert lengths (l1) and thermowell lengths (l5) are specified for each model, with detailed order numbers for each configuration.
• Stop flanges and backing flanges are available per DIN 43734 with dimensions and order numbers provided.

5. Temperature Ranges and Measuring Elements

• Type J (Fe-CuNi): -200 to +600°C
• Type K (NiCr-Ni): -200 to +800°C (up to +1150°C in some variants)
• Type S (Pt10Rh-Pt): 0 to +1300°C
• Type B (Pt30Rh-Pt6Rh): 600 to +1400°C

6. Additional Notes

• Compression fittings and ball compression seals are referenced on page 11.3402.
• Thermocouples without additional thermowell are available for certain temperature ranges.
• Material selection for thermowells depends on operating temperature to ensure durability and corrosion resistance.

Summary

This technical document comprehensively covers the specifications, materials, dimensions, and ordering details for industrial thermocouples T21 and T22. It emphasizes compliance with DIN and EN standards, provides temperature ranges and accuracy classes, and offers multiple design options to suit various industrial applications. The document is essential for engineers and procurement specialists selecting thermocouples for machinery, chemical, and food processing industries.