RTD MLTTS00

Summary

Product Identification

• Product Name: MLTTS00
• Description: Modular thermometer for use in the Oil & Gas industry.

Function and System Design

Measuring Principle

• Resistance Thermometer (RTD): Uses a Pt100 sensor (100 Ω at 0 °C) with a temperature coefficient α = 0.003851 °C⁻¹.
  • Wire Wound (WW): Good reproducibility and long-term stability up to 600 °C, but larger and sensitive to vibrations.
  • Thin Film (TF): Smaller size, better vibration resistance, but may deviate from IEC 60751 standard at high temperatures. Typically used below 400 °C.
• Thermocouples (TC): Utilize the Seebeck effect to measure temperature differences. Material combinations are standardized by IEC 60584 and ASTM E230/ANSI MC96.1.

Operating Limits

Measuring Range

• RTD: –50 to +500 °C (–58 to +932 °F)
• TC: –40 to +1100 °C (–40 to +2012 °F)

Operating Conditions

• Ambient Temperature (Terminal Head):
  • Without mounted head transmitter: Depends on terminal head and cable gland/fieldbus 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)
• Process Pressure: Dependent on the thermowell used.
• Permitted Flow Velocity: Diminishes with increasing immersion length; dependent on thermowell tip diameter, medium, temperature, and pressure.

Shock and Vibration Resistance

• RTD: 3G / 10 to 500 Hz (IEC 60751)
• TC: 4G / 2 to 150 Hz (IEC 60068-2-6)

Performance Characteristics

Accuracy

• RTD Resistance Thermometer (IEC 60751):
  • Class AA: ± (0.1 + 0.0017 · |t|)
  • Class A: ± (0.15 + 0.002 · |t|)
  • Class B: ± (0.3 + 0.005 · |t|)
  • Tolerance Class Temperature Ranges:
    • Wire Wound (WW): Cl. A (–100 to +450 °C), Cl. AA (–50 to +250 °C)
    • Thin-film (TF): Cl. A (–30 to +300 °C), Cl. AA (–30 to +300 °C for Standard, 0 to +150 °C for iTHERM® StrongSens, 0 to +200 °C for other TF)
• Thermocouples (IEC 60584 / ASTM E230/ANSI MC96.1):
  • IEC 60584:
    • Type K: Class 2 (±2.5 °C or ±0.0075 |t|), Class 1 (±1.5 °C or ±0.004 |t|)
  • ASTM E230/ANSI MC96.1:
    • Type K: ±2.2 K or ±0.02 |t|, ±1.1 K or ±0.004 |t|

Response Time

• Tested in flowing water (0.4 m/s at 23 °C).
• iTHERM® StrongSens (6 mm): t₅₀ < 3.5 s, t₉₀ < 10 s
• iTHERM® StrongSens (6 mm with sleeve ⌀8 mm): t₅₀ = 3.5 s, t₉₀ = 14 s
• Thermocouple (TPC100, ungrounded, 6 mm): t₅₀ < 2.5 s, t₉₀ < 7 s
• Thermocouple (TPC100, ungrounded, 6 mm with sleeve ⌀8 mm): t₅₀ = 4 s, t₉₀ = 14 s

Insulation Resistance

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

Dielectric Strength

• ≥ 1000 V DC (between terminals and insert sheath)

Self-Heating

• Negligible when an Endress+Hauser iTEMP® temperature transmitter is connected.

Calibration

• Factory calibration performed according to internal procedure.
• Comparison temperature calibration available from –80 to +1400 °C.
• Calibrations traceable to national and international standards.
• Only the insert is calibrated.

Materials

• Extension Neck, Insert, Process Connection:
  • AISI 316L (1.4404 / 1.4435): Max. 650 °C (1202 °F) for continuous use in air. Good general and specific corrosion resistance.
  • AISI 316Ti (1.4571): Max. 700 °C (1292 °F) for continuous use in air. Comparable to 316L with increased resistance to intergranular corrosion after welding.
  • Inconel 600 (2.4816): Max. 1100 °C (2012 °F) for continuous use in air. Excellent resistance to aggressive, oxidizing, and reducing atmospheres; resistant to chlorine gas and many acids. Not for sulfur-containing atmospheres.

Components

Head Transmitters

• PC Programmable: Configurable via PC with free software. Supports analog output (4-20 mA), HART®, PROFIBUS® PA, FOUNDATION Fieldbus™.
• HART® Programmable: 2-wire device with one or two inputs and one analog output.
• PROFIBUS® PA Programmable: Universally programmable with PROFIBUS® PA communication.
• FOUNDATION Fieldbus™ Programmable: Universally programmable with FOUNDATION Fieldbus™ communication.

Terminal Heads

• TA30D:
  • Protection class: IP66/68.
  • Temperature range (without cable gland): –50 to +150 °C (–58 to +302 °F).
  • Material: Aluminum, polyester powder coated.
  • Threaded cable entry: G ½", ½" NPT, M20x1.5.
  • Can mount two head transmitters.
  • Weight: 390 g (13.75 oz).
• TA21H, DIN B:
  • Protection class: IP66/68.
  • Max. temperature (rubber seal, without cable gland): 100 °C (212 °F).
  • Material: Aluminum alloy, stainless steel.
  • Double threaded cable entry: ½" NPT, ¾" NPT, M20 or G½".
  • Weight: approx. 600 g (21.2 oz).

Cable Glands and Fieldbus Connectors

• Cable gland ½" NPT, M20x1.5 (non Ex): –40 to +100 °C (–40 to +212 °F)
• Cable gland M20x1.5 (dust ignition-proof): –20 to +95 °C (–4 to +203 °F)
• Fieldbus connector (M12x1 PA, 7/8" FF): –40 to +105 °C (–40 to +221 °F)

Design and Dimensions

• Immersion Length (ML): Freely selectable from 35 to 5000 mm (1.38 to 197 in). Longer lengths available on request.

Inserts

• RTD:
  • iTHERM® StrongSens (TS111): 1x Pt100, 4-wire, mineral insulated. Enhanced vibration resistance (> 60g). Measuring range –50 to +500 °C, Class A. Diameter 6 mm or 6 mm with sleeve ⌀8 mm.
• TC:
  • TPC100: 2x K, INCONEL600. Measuring range: –40 to +1200 °C (IEC 60584-2, Class 1) or 0 to +1250 °C (ANSI MC 96.1, Special). Diameter 6 mm or 6 mm with sleeve ⌀8 mm.

Thermometer Connection

• Designed for installation in an existing or separately ordered thermowell using a threaded connection.

Spare Parts

• Inserts are made from mineral-insulated cable (MgO) with sheaths in AISI316L/1.4404 (RTD) or Inconel600 (TC).
• Spare inserts available: TS111 (iTHERM® StrongSens) and TPC100 (TC).

Installation Conditions

• Orientation: No restrictions.
• Installation: Designed for existing thermowells or separately ordered thermowells.

Certificates and Approvals

• CE Mark: Device meets applicable EC directives.
• Hazardous Area Approvals: ATEX, CSA, FM available (contact sales organization for details).
• Other Standards: EN 60079, IEC 60529, IEC 61010-1, IEC 60751, DIN EN 50446, IEC 61326-1.
• PED Approval: Complies with Pressure Equipment Directive 97/23/EC (paragraph 3.3).

Accessories

• Communication-Specific: Configuration Kit TXU10, Commubox FXA195, Commubox FXA291, HART Loop Converter HMX50, Wireless HART adapter SWA70, Fieldgate FXA320, Fieldgate FXA520, Field Xpert SFX100.
• Service-Specific: Applicator software, W@M lifecycle management, FieldCare asset management tool.
• System Components: Field display unit RIA16, Active barrier RN221N, Supply unit RNS221.

Documentation

• Technical Information (TI) documents available for iTEMP® transmitters, inserts, application examples, and thermowells.
• Supplementary ATEX documentation available for specific Ex versions.

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Disclaimer: 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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