RTD TH13, TH14, TH15

Summary

Product Identification

The Endress+Hauser RTD TH13, TH14, and TH15 are RTD (Resistance Temperature Detector) assemblies designed for temperature measurement in various industrial processes, including harsh environments. They are typically installed in barstock thermowells.

Measuring Principle

These sensors utilize a Pt100 temperature element adhering to IEC 60751 standards, with a resistance of 100 Ω at 0 °C and a temperature coefficient of α = 0.003851 °C⁻¹. Two main types of platinum resistance thermometers are available:

• Wire Wound (WW): Offers good long-term stability up to 600 °C, but is larger and more sensitive to vibrations.
• Thin Film (TF): Smaller and more vibration-resistant, but limit values of tolerance category A per IEC 60751 are generally observed only up to approximately 300 °C. These are typically used below 400 °C.

Measuring System and Architecture

Endress+Hauser offers complete solutions for temperature measuring points, including power supply units, barriers, display units, and overvoltage protection. The RTD assemblies are designed for use in two primary temperature ranges:

• Low temperature range: –50 to 200 °C (–58 to 392 °F)
• High temperature range: –200 to 600 °C (–328 to 1 112 °F)

A specific construction, "iTHERM StrongSens," utilizes Pt100 thin-film sensors with enhanced vibration resistance (> 60g). These have a measuring range of –50 to +500 °C (–58 to +932 °F).

Input

• Measured Variable: Temperature (temperature-linear transmission behavior).
• Measuring Range:
  • TH13, TH14, TH15 (Low temperature range): –50 to 200 °C (–58 to 392 °F)
  • TH13, TH14, TH15 (High temperature range): –200 to 600 °C (–328 to 1 112 °F)
  • TH13, TH14, TH15 (Pt100 thin-film, iTHERM StrongSens): –50 to +500 °C (–58 to +932 °F)

Output

Measured values can be transmitted directly or via an Endress+Hauser iTEMP temperature transmitter. Available output and communication protocols include:

• Analog output 4 to 20 mA
• HART®
• PROFIBUS® PA
• FOUNDATION Fieldbus™
• PROFINET® with Ethernet-APL
• Bluetooth® connectivity (optional)
• IO-Link®

iTEMP transmitters offer enhanced accuracy, reliability, and long-term stability (≤ 0.05 % per year).

Galvanic Isolation

Galvanic isolation is available on most devices, with a typical value of 2 kV AC.

Power Supply

• Active barrier RN42: Offers a universal power supply with an input voltage of 24 to 230 V AC/DC, 0/50/60 Hz.

Performance Characteristics

• Response Time (RTD assembly TH15 without thermowell):
  • High temperature range: 3 s
  • Low temperature range: 9 s
• Response Time (with thermowell): Varies by thermowell type (stepped, tapered, straight) and temperature range, ranging from 20 s to 35 s for assemblies without a transmitter.
• Accuracy: RTD sensors correspond to IEC 60751 classes AA, A, and B. Tolerances vary based on class, sensor type (TF, WW, StrongSens), and temperature range.
• Transmitter Accuracy (examples):
  • TMT162 HART® Field transmitter: ≤ 0.105 °C (0.19 °F)
  • TMT82 HART®/TMT84 PA/TMT85 FF: ± typ. 0.25 °C (0.45 °F)
• Transmitter Long-term Stability: ≤ 0.1 °C (0.18 °F)/year or ≤ 0.05 % / year.
• Insulation Resistance: ≥ 100 MΩ at 25 °C; ≥ 10 MΩ at 300 °C.
• Self Heating: Negligible when an Endress+Hauser iTEMP temperature transmitter is connected.
• Calibration: Manufacturer provides comparison calibrations traceable to NIST standards, conforming to ASTM E220.

Installation

• Orientation: No restrictions.
• Immersion: Minimum immersion lengths are recommended to minimize errors from ambient temperature. For thermowell assemblies (TH13, TH14), these range from 2½" for stepped thermowells to 4½" for tapered and weld-in thermowells.

Environment

• Ambient Temperature Range:
  • Terminal head (without transmitter): Depends on head type.
  • Terminal head (with transmitter): –40 to 85 °C (–40 to 185 °F).
  • Field transmitter (without display): –40 to 85 °C (–40 to 185 °F).
  • Field transmitter (with display/overvoltage protection): –40 to +80 °C (–40 to +176 °F).
• Shock and Vibration Resistance:
  • iTHERM StrongSens Pt100 (TF): > 600 m/s² (60g)
  • Thin-film (TF) and Wire wound (WW) standard sensors: 30 m/s² (3g)

Mechanical Construction

• Design and Dimensions: Specific dimensions for TH13, TH14, and TH15 are provided in detailed tables and graphics within the datasheet.
• Weight: From 1 to 5.5 lbs for assemblies. Terminal heads vary (e.g., TA30H aluminum approx. 860 g, stainless steel approx. 2,900 g).
• Material: Various materials are available for process connections, thermowells, and enclosures, including AISI 316L/1.4404, AISI 316/1.4401, AISI A105/1.0460, and Alloy C276/2.4819. Recommended maximum temperatures for continuous use in air vary by material.
• Process Connection: Available for TH13 (Threaded: NPT 1/2", 3/4", 1"; Socket weld: NPS 3/4", 1"; Weld-in: NPS 3/4", 1"). TH14 utilizes flange connections (ASME B16.5). TH15 offers threaded connections (NPT) and Nipple Union Nipple (NUN).
• Housing: Various terminal heads (TA30H, TA30R, TU401) and field transmitters (TMT162, TMT142B) are available with different protection classes (IP66/68, IP67), materials, and temperature ranges.

Certificates and Approvals

Current certificates and approvals are available on the Endress+Hauser website.

Accessories

A range of accessories, including O-rings, display kits, cable glands, configuration kits, and overvoltage protection modules, are available. Software tools such as Applicator and FieldCare are also offered for selection, configuration, and asset management.

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Disclaimer: This extraction may miss figures, footnotes, or revisions. Contractual data must match the OEM PDF revision used on the project.

Official datasheet (PDF)

Lenntech datasheet mirror