The WIKA TT.50 is designed for industrial applications that require both a visible local temperature reading and an electrical signal for monitoring or control systems.

It uses two independent measuring elements in one insertion point:

• Mechanical element: A bimetal helix drives the dial pointer, providing local temperature indication without external power.
• Electrical element: A thermocouple or RTD measures temperature for electrical signal transmission to a monitoring or control system.

This dual-measurement design can simplify installation where operators need to read temperature at the equipment while a control room collects the same process temperature electronically.

Key Features

• Dual temperature measurement: Combines mechanical indication and an electrical sensing element in one probe.
• 5-inch dial: 127 mm back-connected dial for local reading.
• Measuring range: -40 to 550 °F, with equivalent Celsius ranges available.
• Accuracy: ±1.0% of measurement span.
• Stainless steel construction: 304 stainless steel case, stem, and standard connection components.
• Electrical sensor options: Type K thermocouple is standard; Type J, E, and T thermocouples and Pt100 RTD configurations are available.
• Optional transmitter: 4–20 mA output can be configured with a compatible transmitter.
• Industrial protection: Hermetically sealed case design in accordance with ASME B40.3.
• Flexible stem lengths: Thermocouple configurations offer stem lengths from 2.5 to 48 inches; RTD configurations typically start at 4 inches.
• Optional accessories: Thermowells, alternative window materials, and calibration certification traceable to NIST are available.

Suitable Applications

• Industrial process monitoring: Local temperature indication with an additional electrical signal for monitoring systems.
• Chemical and petrochemical facilities: Temperature measurement where the process medium is compatible with the selected stainless steel materials.
• Power generation: Local and remote temperature monitoring of suitable equipment and piping.
• Process equipment and pipelines: Dual-reading applications where operators and control systems both need temperature information.
• Industrial maintenance: Applications requiring local inspection and electronic data acquisition from the same insertion point.
• Temperature monitoring systems: Installations using thermocouple, RTD, or compatible 4–20 mA instrumentation.

Technical Highlights & Selection Considerations

Before ordering the WIKA TT.50, verify the following:

• Measuring range: Confirm that the selected scale matches the expected process temperature.
• Electrical sensor type: Choose the required thermocouple type or Pt100 RTD.
• Output signal: Specify direct thermocouple/RTD wiring or a compatible 4–20 mA transmitter configuration.
• Stem length: Match the insertion length to the installation and existing thermowell.
• Process connection: The standard connection is 1/2-inch NPT; confirm thread type and dimensions before replacement.
• Dial and mounting: The TT.50 uses a 5-inch back-connected dial. If an adjustable-angle dial is required, consider the related TT.52 model.
• Material compatibility: Standard wetted construction uses 304 stainless steel. Verify compatibility with the process medium.
• Accessories and certification: Confirm whether a thermowell, protective housing, or calibration certificate is required.

Important: The mechanical dial and electrical sensor are independent measuring elements. Confirm the required sensor type, range, wiring, and transmitter options in the complete order code before purchasing.

FAQ

Q1: What is the WIKA TT.50 used for?

It is used for industrial temperature measurement where both local dial indication and an electrical output for remote monitoring are required.

Q2: What is the difference between the mechanical and electrical outputs?

The mechanical bimetal element drives the dial pointer for local reading. The independent thermocouple or RTD element provides an electrical signal for monitoring or data acquisition.

Q3: Does the TT.50 provide a 4–20 mA output?

A 4–20 mA output is available as an option through a compatible temperature transmitter. Confirm the transmitter configuration when ordering.

Q4: What is the standard temperature range?

The datasheet lists a range of -40 to 550 °F, with equivalent Celsius ranges available. Confirm the exact scale required for your application.

Q5: What information is needed to order the correct TT.50?

Provide the measuring range, thermocouple or RTD type, stem length, process connection, required electrical output, and any thermowell or certification requirements. If replacing an existing unit, a nameplate photo or full order code is helpful.