iTherm Moduline TM411

Summary

Product identification

The iTHERM ModuLine TM411 is a modular resistance thermometer designed for hygienic and aseptic applications. It features a metric version with advanced sensor technology.

Applications

• Specially designed for hygienic and aseptic applications in the Food & Beverages and Life Sciences industries.

Operating limits

• Measuring range: –200 to +600 °C (–328 to +1 112 °F)
• Pressure range: Up to 50 bar (725 psi)
• Protection class: Up to IP69K

Feed water

Measured variable

• Temperature (temperature-linear transmission behavior)

Measuring range

The measuring range depends on the type of sensor used:

• Pt100 thin-film: –50 to +400 °C (–58 to +752 °F)
• Pt100 thin-film, iTHERM StrongSens (vibration-resistant > 60g): –50 to +500 °C (–58 to +932 °F)
• Pt100 thin-film, iTHERM QuickSens (fast-response): –50 to +200 °C (–58 to +392 °F)
• Pt100 wire wound, extended measuring range: –200 to +600 °C (–328 to +1 112 °F)

Product water

See Feed water section.

Electrical

Output signal

The measured value can be transmitted via:

• Directly-wired sensors.
• Endress+Hauser iTEMP temperature transmitters using common protocols:
  • 4 to 20 mA analog output, HART® (optional HART® SIL transmitter)
  • PROFIBUS® PA
  • FOUNDATION Fieldbus™
  • PROFINET® over Ethernet-APL
  • IO-Link®

Power supply

• Electrical connecting cables must be smooth, corrosion-resistant, and easy to clean, according to 3-A Sanitary Standard and EHEDG.
• Grounding or shield connections are possible via special ground terminals on the terminal head.

Mechanical / hydraulic

Design

• Terminal head: Available in 316L (low head, optional display), Aluminum (high or low head, with/without display), Polypropylene (low head), and Polyamide (high head). Offers optimal terminal access, optional local display, and IP69K protection.
• Wiring, electrical connection, output signal: Ceramic terminal block or flying leads. Head transmitters with single or two-channel options. Attachable display is optional.
• Plug or cable gland: Polyamide or brass cable glands. M12 or 7/8" plugs available for various protocols.
• Extension neck: Welded-in-place or removable with iTHERM QuickNeck (tool-free insert removal) or thread adapter nut G3/8".
• Process connection: Over 50 different versions available.
• Thermowell: Versions with and without thermowell, various diameters, and tip shapes (straight or reduced).
• Insert: Features include iTHERM QuickSens (fast response time, t90s: 1.5 s) and iTHERM StrongSens (vibration resistance > 60g). Sensor types include wire wound (WW) or thin-film (TF). Insert diameters of ⌀3 mm (¹⁄₈ in) or ⌀6 mm (¹⁄₄ in).

Sensor Technology Features

• iTHERM QuickSens: Fastest response times.
• iTHERM StrongSens: Unsurpassed vibration resistance (> 60g).
• iTHERM QuickNeck: Enables simple, tool-free recalibration.

Materials

• Terminal head: 316L, Aluminum, Polypropylene, Polyamide.
• Surface roughness: Not specified, but hygienic standards apply.

Response time

Test performed in water at 0.4 m/s with a 10 K temperature change. Values for t50 and t90 vary significantly based on insert type, thermowell presence, and tip shape.

• Example (with heat transfer paste, without thermowell, ⌀3 mm insert, iTHERM QuickSens): t90 = 1.5 s
• Example (without heat transfer paste, without thermowell, ⌀3 mm insert, iTHERM QuickSens): t90 = 0.75 s

Calibration

• Calibration can be performed at fixed-point temperatures or against a reference thermometer.
• Endress+Hauser offers thermometer evaluation and sensor-transmitter matching services.
• Standard calibrations are available from –80 to +600 °C (–112 to +1 112 °F) based on ITS90.
• Minimum insertion lengths are required for accurate calibration, depending on temperature.

Insulation resistance

• ≥ 100 MΩ at ambient temperature, measured between terminals and outer jacket with a minimum voltage of 100 VDC.

Mounting and Installation

• Orientation: No restrictions, but self-draining must be guaranteed.
• Immersion length: Ideally corresponds to half the pipe diameter. Minimum immersion lengths are recommended based on sensor type.
• Hygiene: Adherence to EHEDG and 3-A Sanitary Standard requirements is critical for installation.

Environment

• Ambient temperature range:
  • Terminal head (without mounted transmitter): Depends on terminal head and cable gland/connector.
  • Terminal head (with mounted transmitter): –40 to +85 °C (–40 to +185 °F).
  • Terminal head (with mounted transmitter and display): –20 to +70 °C (–4 to +158 °F).
  • Extension neck (Quick-fastening iTHERM QuickNeck): –50 to +140 °C (–58 to +284 °F).

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