Thermophant TTR31

Summary

Product Identification

The Thermophant T TTR31 is a temperature switch with threaded connections or compression fitting. The Thermophant T TTR35 is designed for hygienic applications.

Applications

These devices monitor, display, and control process temperatures in the range of –50 to 200 °C (–58 to 392 °F). Specific applications include:

• Hygienic applications (TTR35)
• Electronic versions with:
  • One PNP switch output
  • Two PNP switch outputs
  • Two PNP switch outputs or one PNP switch output and a 4 to 20 mA active output

Key Features and Benefits

• Compact design with integrated switching electronics for decentralized monitoring.
• High reproducibility and long-term stability.
• On-site function check and information via LEDs and digital display.
• Platinum temperature sensor (Pt100, Cl. A as per IEC 60751) with long-term stability.
• High accuracy across the ambient temperature range and short response time.
• Operable and visualizable with PC and FieldCare configuration software.
• Top housing section can be rotated 310°.
• DESINA-compliant.
• 3-A mark and EHEDG certification for TTR35.

Measuring Principle

The devices use a platinum sensor (Pt100) whose resistance changes with temperature. This resistance is converted electronically. The resistance-temperature relationship follows IEC 60751.

Measuring System

• Sensor: Pt100
• Field of application: Measurement, monitoring, and control of process temperatures. For hygienic processes with the TTR35.
• Process Connection:
  • TTR31: Compression fitting or threaded connections (G½", G¼", NPT¼", NPT½").
  • TTR35 (Hygienic): Conical metal-metal G½", Clamp 1" - 1½", 2", Varivent F/N, DIN 11851, APV Inline.

Measuring Range

• Standard: –50 to 150 °C (–58 to 302 °F)
• With extension neck: –50 to 200 °C (–58 to 392 °F)
• Hygienic applications (TTR35): –50 to 150 °C (–58 to 302 °F), or up to 200 °C (392 °F) with extension neck.
• Minimum Span: 20 K (36 °F)

Output

• Signal Type: DC voltage version
  • 1x PNP switch output
  • 2x PNP switch outputs
  • 1x PNP switch output and 4 to 20 mA output (active)
• Signal on Alarm:
  • Analog output: ≤ 3.6 mA or ≥ 21.0 mA
  • Switch outputs: Safe state (switch open)
• Switching Capacity:
  • Switch ON: Ia ≤ 250 mA
  • Switch OFF: Ia ≤ 1 mA
  • Voltage drop PNP: ≤ 2 V
• Switching Cycles: > 10,000,000
• Range of Adjustment:
  • Switch point (SP) and switchback point (RSP) in 0.1 °C (0.18 °F) increments. Minimum difference between SP and RSP is 0.5 °C (0.8 °F).
  • Lower Range Value (LRV) and Upper Range Value (URV) for analog output configurable within the sensor range.
• Damping: Configurable from 0 to 40 s in 0.1 s increments.

Power Supply

• Supply Voltage: 12 to 30 VDC (reverse polarity protection).
• Current Consumption: < 60 mA (without load, with reverse polarity protection).

Performance Characteristics

• Reference Operating Conditions: As per DIN IEC 60770 or DIN IEC 61003 at T = 25 °C (77 °F).
• Maximum Measured Error (Switch Point & Display):
  • Electronics: 0.2 K (0.36 °F)
  • Sensor: Class A as per IEC 60751. Maximum error = ± 0.15 + 0.002 · |T| °C.
• Total Error:
  • –50 to +75 °C: ≤ 0.5 K (0.9 °F)
  • +75 to +200 °C: ≤ 0.75 K (1.35 °F)
• Switch Point Non-Reproducibility: 0.1 K (0.18 °F) as per EN 61298-2.
• Long-Term Drift: ≤ 0.1 K (0.18 °F) per year under reference conditions.
• Sensor Response Time:
  • t₅₀: 100 ms
  • t<0xE2><0x82><0x90>₀: < 1.0 s
• Switch Output Response Time: 100 ms
• Analog Output Rise Time (t<0xE2><0x82><0x90>₀): ≤ 200 ms
• Analog Output Settling Time (t<0xE2><0x82><0x99>₉): ≤ 500 ms
• Long-Term Reliability: Mean Time Between Failure (MTBF) > 100 years.

Environmental Limits

• Ambient Temperature Range: –40 to +85 °C (–40 to +185 °F)
• Storage Temperature: –40 to +85 °C (–40 to +185 °F)
• Operating Altitude: Up to 4,000 m (13,123.36 ft) above sea level.
• Degree of Protection:
  • IP65 (M16 x 1.5 or NPT ½" valve connector)
  • IP66 (M12 x 1 connector)
• Shock Resistance: 50 g as per DIN IEC 68-2-27 (11 ms).
• Vibration Resistance: 20 g as per DIN IEC 68-2-6 (10-2000 Hz); 4 g as per marine approval.
• Electromagnetic Compatibility (EMC): In accordance with IEC/EN 61326 series and NAMUR Recommendation EMC (NE21). Interference emission Class B.

Process Limits

• Process Temperature Range: –50 to +150 °C (–58 to +302 °F), or –50 to +200 °C (–58 to +392 °F) with extension neck. Restrictions apply based on ambient temperature and process connection.
• Process Pressure Range: Maximum permitted process pressure depends on insertion length. See the diagram provided. For the conical metal-metal hygienic process connection (MB option), the maximum pressure is 1.6 MPa = 16 bar (232 psi).
• Permitted Flow Velocity: Depends on insertion length. See the diagram provided.

Mechanical Construction

• Materials:
  • Process connection: AISI 316L
  • Surfaces in contact with the process (hygienic version): Ra ≤ 0.76 µm (30 µin).
  • Coupling nut: AISI 304
  • Housing: AISI 316L
  • O-rings: EPDM, FKM
  • Electrical connection components: Polyamide (PA), Polycarbonate (PC-FR), Polyurethane (PUR).
• Weight: Approximately 300 g (10.58 oz), depending on process connection and sensor length.

Operability

• Local Operation: Menu-guided operation via keys. Functions include unit selection, zero point adjustment, damping configuration, display settings, switch output configuration (hysteresis/window, NC/NO), analog output configuration, and service functions (reset, lock, error display, simulation).
• Remote Operation: Operation, visualization, and maintenance can be performed via PC using ReadWin 2000 or FieldCare configuration software.

Certificates and Approvals

• CE Mark: Conforms to EU directives.
• Other Standards: IEC 60529 (IP code), IEC/EN 61010-1, IEC/EN 61326 series, NAMUR, NEMA.
• UL Approval: More information available via UL Product iq™ (keyword: E225237).
• Hygiene Standards:
  • EHEDG certification (Type EL CLASS I).
  • 3-A Authorization (No. 1144, 3-A Sanitary Standard 74-07).
  • FDA-compliant materials.
• Materials in Contact with Food/Product (FCM): Comply with relevant European regulations ((EC) No. 1935/2004, (EC) No. 2023/2006, (EC) No. 10/2011). Free from materials derived from bovine animals or other livestock (ADI/TSE).
• Material Certification: Material certificate 3.1 (EN 10204) can be requested separately.

Accessories

• Device-Specific: Welding boss, compression fitting.
• Communication-Specific: M12x1 couplings (straight, elbowed), connecting cables (PVC), configuration kits (TXU10-AA, FXA291).
• System Components: Easy Analog RNB130 power supply, Process Indicator RIA452.

Disclaimer: 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