iTherm Moduline TM101

Summary

Product identification

The iTHERM ModuLine TM101 is an RTD or thermocouple thermometer designed for direct process installation without a thermowell.

Application

• For universal use
• For use in non-hazardous areas
• Measuring range: –50 to +650 °C (–58 to +1 202 °F)
• Pressure range up to 50 bar (725.2 psi)
• Degree of protection: up to IP 68

Measuring principle

Resistance thermometers (RTD)

• Utilizes Pt100 temperature sensors according to IEC 60751.
• Sensor resistance is 100 Ω at 0 °C (32 °F) with a temperature coefficient α = 0.003851 °C⁻¹.
• Available in wire-wound (WW) and thin-film (TF) types.
  • Wire-wound: Suitable for temperatures up to 600 °C (1 112 °F), but sensitive to vibrations.
  • Thin-film: Smaller size, better vibration resistance, but may deviate from IEC 60751 at higher temperatures (accurate to Class A up to approx. 300 °C / 572 °F).

Thermocouples (TC)

• Use the Seebeck effect for temperature measurement.
• Measure temperature differences; absolute temperature requires knowledge of the cold junction temperature.
• Standardized according to IEC 60584 and ASTM E230/ANSI MC96.1.

Measuring System

The system can include:

• Power supply unit/barrier
• Display units
• Surge arrester

Output

• Analog output: 4 to 20 mA, HART®
• Digital communication: IO-Link®
• Optional: Bluetooth® connectivity for wireless configuration and data display.

Input

Measured variable

• Temperature (temperature linear transmission behavior)

Measuring range

Depends on the sensor type:

• Pt100 thin-film (TF), basic: –50 to +200 °C (–58 to +392 °F)
• Pt100 thin film (TF), standard: –50 to +400 °C (–58 to +752 °F)
• Pt100 thin film (TF), iTHERM StrongSens: –50 to +500 °C (–58 to +932 °F)
• Pt100 wire wound (WW), extended: –200 to +600 °C (–328 to +1 112 °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: (Range not specified in extract)

Power Supply

Terminal lugs with a nominal diameter of 1.3 mm (0.05 in).

Terminal assignment

Supports various RTD (2, 3, 4-wire) and Thermocouple (TC) connections.

Terminals

Push-in terminals are standard unless screw terminals are explicitly selected.

Cable entries

To be selected during device configuration.

Connectors

Various plug connector combinations are available, including M12 (4-pin, 8-pin) and 7/8" plugs.

Surge arrester

Optional surge arresters (HAW562, HAW569) are available for protection against overvoltage.

Performance characteristics

Reference conditions

Data is relevant for transmitter accuracy.

Maximum measurement error

• RTD: Tolerances for Class A, AA, and B as per IEC 60751.
  • Class A: ± (0.15 + 0.002 · |t|) °C
  • Class AA: ± (0.1 + 0.0017 · |t|) °C
  • Class B: ± (0.3 + 0.005 · |t|) °C
  • (|t| = absolute temperature value in °C)
• Thermocouples: Permissible deviation limits according to IEC 60584 and ASTM E230/ANSI MC96.1.

Influence of ambient temperature

Depends on the head transmitter used.

Self-heating

Negligible when using an Endress+Hauser iTEMP temperature transmitter due to small measurement current.

Response time (typical values in water, 0.4 m/s, 10 K step change)

• Standard Pt100 (Direct contact, 3 or 6 mm diameter):
  • t₅₀: 5 s
  • t₉₀: 11 s
• Type J, K, N (TC) (Direct contact, 3 or 6 mm diameter):
  • t₅₀: 2.5 s
  • t₉₀: 7 s

Calibration

• Methods include fixed-point temperatures and comparison against a reference thermometer.
• Sensor-transmitter matching using Callendar/Van Dusen (CvD) coefficients is available as a service.
• Standard calibrations are offered based on ITS90 from –80 to +600 °C (–112 to +1 112 °F).

Insulation resistance

• RTD: > 100 MΩ at 25 °C (between terminals and sheath, 100 V DC).
• TC: > 1 GΩ at 20 °C, > 5 MΩ at 500 °C (between terminals and sheath, 500 V DC).

Installation

Orientation

No restrictions, but self-draining should be considered.

Installation instructions

• Immersion length is critical for accuracy; aim for at least half the pipe diameter when installing in pipes.
• Counterparts for process connections and seals are not supplied.

Ambient conditions

Ambient temperature range

• Terminal head (without transmitter): Depends on head and cable gland/connector.
• With mounted head transmitter: –40 to +85 °C (–40 to +185 °F)
• With mounted head transmitter and display: –20 to +70 °C (–4 to +158 °F)

Storage temperature

Refer to ambient temperature ranges.

Humidity

• Condensation permitted (IEC 60068-2-33)
• Max. 95% relative humidity (IEC 60068-2-30) (with iTEMP head transmitters)

Climate class

Class C (as per EN 60654-1)

Degree of protection

• Max. IP 66 (NEMA Type 4x encl.)
• Partly IP 68 (tested in 1.83 m / 6 ft over 24 h)

Shock and vibration resistance

• Inserts exceed IEC 60751 requirements (3g, 10-500 Hz).
• Vibration resistance varies by sensor type:
  • Pt100 (WW), TC: ≤ 30 m/s² (3g)
  • Pt100 (TF), basic/standard: ≤ 40 m/s² (4g)
  • iTHERM StrongSens / QuickSens (6mm): ≤ 600 m/s² (60g)
  • iTHERM QuickSens (3mm): ≤ 30 m/s² (3g)

Electromagnetic compatibility (EMC)

Depends on the head transmitter used.

Process

Process temperature range

Max. –200 to +1 100 °C (–328 to +2 012 °F), depending on sensor and material.

Process pressure range

Pmax. = 50 bar (725 psi). Maximum pressure depends on design, connection, and temperature.

Mechanical construction

Design, dimensions

Variable dimensions exist, such as insertion length (IL), lagging length (T), and immersion length (U).

Weight

1 to 2.5 kg (2.2 to 48.5 lbs) for standard versions.

Material

• AISI 316L/1.4404, 1.4435: Max. continuous use in air: 650 °C (1 202 °F). Good general corrosion resistance, high resistance in chlorinated/acidic non-oxidizing atmospheres.
• Alloy 600/2.4816: Max. continuous use in air: 1 100 °C (2 012 °F). Good resistance to aggressive, oxidizing/reducing atmospheres, chlorine gases, and mineral/organic acids. Not for sulfur-containing atmospheres.

Process connections

• Threaded: M20x1.5, M18x1.5, G½", G¼", NPT ½". Max. static process pressure for threaded connections is 400 bar (5 802 psi) at +400 °C (+752 °F).
• Cap nut: G½", G¾". Not designed as process connections; only for installation in an existing thermowell.
• Compression fitting (TK40):
  • NPT ½", G ½" (ferrule material PEEK or 316L).
  • Max. pressures range from 5 bar (PEEK) to 40 bar (316L) and 25 bar (316L) at various temperatures.
  • Spring-loaded version available for G½" or NPT ½".

Inserts

• Non-replaceable insert except in version 3 (compression fitting).
• Standard thin-film: 1x or 2x Pt100 (3- or 4-wire), measuring range –50 to +200 °C (–58 to +392 °F), Class A or B, diameter 6 mm (0.24 in). Vibration resistance up to 3g.
• TC thermocouples (Type K): Mineral insulated, Alloy 600 sheathed, ungrounded hot junction. Measuring range –270 to +1 100 °C (–454 to +2 012 °F), diameter 6 mm (0.24 in). Vibration resistance up to 3g.

Surface roughness

Wetted surfaces: Ra ≤ 0.76 µm (0.03 µin).

Terminal heads

Various types available (TA20AB, TA30A, TA30EB, TA20L Mignon), offering different degrees of protection (IP 66/68, NEMA 4x), temperature ranges, materials, and cable entry options.

Certificates and approvals

Available on the Endress+Hauser website.

Ordering information

Detailed ordering information is available from sales organizations or the Endress+Hauser Product Configurator.

Accessories

A range of accessories, including software tools (Applicator, Configurator, DeviceCare, FieldCare) and IIoT ecosystem (Netilion), are available.

Supplementary documentation

Technical Information (TI) documents are available on the Endress+Hauser website.

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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)

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