iTherm Surfaceline TM611

Summary

Product identification

iTHERM SurfaceLine TM611 Surface thermometer Non-invasive RTD/TC thermometer with high measurement performance for demanding applications

Application

• Universally usable in all industries.
• Ideal for demanding process conditions such as high flow velocities, high process pressures, viscous or corrosive media, abrasion, pigging, or small pipe diameters.
• Suitable for subsequent installation in existing facilities for energy and safety monitoring.

Benefits

• Measurement accuracy and response time comparable to invasive measurements.
• No process opening required, eliminating leakage risk.
• Increased safety for personnel, plant, and the environment.
• User-friendly from product selection to installation and maintenance.
• Significant cost savings due to reduced development and project planning times, lower installation and certification expenses, and elimination of costs for thermowells, nozzles, flanges, weld seam inspections, and pipe extensions.
• Compatible with iTEMP temperature transmitters offering common communication protocols and optional Bluetooth® connectivity.
• International certifications available, including explosion protection (ATEX, IECEx, CSA, NEPSI) and functional safety (SIL).

Input

Measured variable

• Temperature (temperature-linear transmission behavior)

Measuring range

The measuring range depends on the type of sensor used:

• Pt100 (WW): –200 to +600 °C (–328 to +1 112 °F)
• Pt100 (TF) Basic: –50 to +200 °C (–58 to +392 °F)
• Pt100 (TF) Standard: –50 to +400 °C (–58 to +752 °F)
• Pt100 (TF) iTHERM QuickSens: –50 to +200 °C (–58 to +392 °F)
• Pt100 (TF) iTHERM StrongSens: –50 to +500 °C (–58 to +932 °F)
• Thermocouple TC, type J: –40 to +750 °C (–40 to +1 382 °F)
• Thermocouple TC, type K: –40 to +1 100 °C (–40 to +2 012 °F)
• Thermocouple TC, type N: (Specific range not detailed in extract, see official PDF)

Output

Output signal

The measured value can be transmitted:

• Directly-wired sensors (without an iTEMP transmitter).
• Via an appropriate iTEMP transmitter using common protocols.

Family of temperature transmitters

Thermometers can be fitted with iTEMP transmitters for enhanced accuracy, reliability, and reduced costs. Available transmitter types include:

• 4 to 20 mA head transmitters: Configurable via PC using free Endress+Hauser software.
• HART® head transmitters: 2-wire devices with one or two measuring inputs and one analog output. Support wireless configuration via optional Bluetooth® and E+H SmartBlue app.
• PROFIBUS® PA head transmitters: Universally programmable with PROFIBUS® PA communication.
• FOUNDATION Fieldbus™ head transmitters: Universally programmable with FOUNDATION Fieldbus™ communication.
• Head transmitter with PROFINET® and Ethernet-APL™: 2-wire device with two measurement inputs, supporting PROFINET® protocol.
• Head transmitter with IO-Link®: IO-Link® device with one measurement input.

Power supply

• Supply voltage: Max. 9 to 42 VDC, depending on the iTEMP temperature transmitter used.
• Current consumption: I ≤ 23 mA, depending on the iTEMP temperature transmitter used.

Environment

Ambient temperature range

• RTD and TC industrial thermometers (Terminal head):
  • Without mounted head transmitter: Depends on terminal head, cable gland, or fieldbus connector.
  • With mounted iTEMP head transmitter: –40 to +85 °C (–40 to +185 °F).
  • With mounted iTEMP head transmitter and display: –20 to +70 °C (–4 to +158 °F).
• RTD cable thermometers (Connecting cable/tube insulation):
  • PVC/PVC: 80 °C (176 °F)
  • PTFE/silicone: 180 °C (356 °F)
  • PTFE/PTFE: 200 °C (392 °F)
• TC cable thermometers (Connecting cable/tube insulation):
  • PVC/PVC: 80 °C (176 °F)
  • Glass fiber / glass fiber: 400 °C (751 °F)

Storage temperature

• –40 to +85 °C (–40 to +185 °F).

Operating altitude

• Up to 2 000 m (6 561 ft) above sea level.

Humidity

• Depending on the transmitter used. With head transmitters: Condensation permitted (IEC 60 068-2-33), Max. rel. humidity: 95% (IEC 60068-2-30).

Climate class

• As per EN 60654-1, Class D.

Degree of protection

• Max. IP 66 (NEMA Type 4x encl.), depending on design. Partly IP 68 (Tested in 1.83 m over 24 h).

Shock and vibration resistance

• Endress+Hauser inserts exceed IEC 60751 requirements (3g at 10-500 Hz). Vibration resistance varies by sensor type:
  • Pt100 (WW), TC type J, K, N: ≤ 30 m/s² (≤ 3g)
  • Pt100 (TF) Basic, Standard, QuickSens (ø3 mm): ≤ 30 m/s² (≤ 3g)
  • Pt100 (TF) StrongSens, QuickSens (ø6 mm): ≤ 600 m/s² (≤ 60g)
• For marine applications, the entire device vibration resistance is ≤ 0.7 g.

Electromagnetic compatibility (EMC)

• Meets IEC/EN 61326-series and NAMUR Recommendation EMC (NE21).
• Maximum fluctuations during EMC tests: < 1 % of measuring span.
• Interference immunity to IEC/EN 61326-series (industrial areas).
• Interference emission to IEC/EN 61326-series (electrical equipment Class B).

Pollution degree

• Pollution degree 2.

Process

Process temperature range

• Depends on sensor type and material; max. –200 to +400 °C (–328 to +752 °F).

Process pressure range

• No restrictions as measurement is non-invasive.

Mechanical construction

Design, dimensions

• Dimensions are provided in diagrams and tables; variable dimensions such as extension neck length (E) are configurable.
• Insert diameter (⌀ID): ⌀3 mm (0.12 in).
• Coupling element thread: G½" (AF 27).

Weight

• 1 kg for standard version (example: Coupling element with short extension neck and iTHERM ModuLine TM111 with terminal head TA30R). Weight depends on product and configuration.

Materials

• AISI 316L / 1.4404 (X2CrNiMo17-12-2): Recommended max. temperature for continuous use in air is 650 °C (1 202 °F). Properties include austenitic, stainless steel with high corrosion resistance, increased resistance to intergranular corrosion and pitting.

Inserts

• Inserts are not replaceable due to device design.
• Various RTD and TC insert types are available with different vibration resistances, measuring ranges, accuracy classes, and diameters.

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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