The WIKA TI.T20 uses a bimetal helix to convert temperature changes into pointer movement. Its slim stem is designed for temperature measurement in applications where a smaller probe diameter is beneficial.
Unlike the industrial TI.20, which uses a threaded 1/4-inch NPT process connection, the TI.T20 features a plain connection with a 7/16-inch hex hub and no threads. This difference is important when selecting a replacement or integrating the thermometer into OEM equipment.
Key Features
- Measuring principle: Mechanical bimetal helix.
- Dial size: 2 inches (50.8 mm) for the TI.T20 model.
- Accuracy: ±1% of full-scale value according to ASME B40.3, Grade A.
- Stem material: 304 stainless steel.
- Thin stem design: Approximately 0.150-inch (3.81 mm) stem diameter in the standard configuration.
- Connection: Plain connection with a 7/16-inch hex hub; no threads.
- Temperature range: Configurations are available across ranges from approximately −100 °F to +1,000 °F, depending on the selected scale.
- Scale options: Fahrenheit, Celsius, or dual Fahrenheit/Celsius scales.
- Vibration damping: Inert gel helps reduce pointer oscillation.
- External reset: Available on plain-connection configurations.
- Optional accessories: Special stem lengths, special scales, a Lexan window, a sharp stem tip, and a beaker clip may be available.
Suitable Applications
- Laboratories: Local temperature indication in suitable laboratory equipment and test setups.
- OEM equipment: Integration into equipment requiring a compact mechanical thermometer.
- Temperature testing: Monitoring temperature during equipment testing and evaluation.
- Research and development: Direct temperature readings in compatible experimental setups.
- Special-purpose equipment: Applications requiring a thin stainless steel stem and a mechanical dial indicator.
WIKA identifies laboratories and OEM applications as the primary application areas for the TI.T20.
Technical Highlights & Selection Considerations
Before ordering the WIKA TI.T20, confirm the following:
- Model size: Distinguish the 2-inch TI.T20 from the smaller 1¾-inch TI.T17.
- Temperature scale: Specify the required measuring range and whether the dial should display °F, °C, or both.
- Stem length: Confirm the insertion length required by the application. Special lengths may be available.
- Stem diameter: Verify that the thin stem fits the equipment or measurement point.
- Connection style: The plain 7/16-inch hex-hub connection is not interchangeable with a threaded NPT connection without a suitable mounting arrangement.
- External reset: Confirm whether an adjustable pointer/reference setting is needed; availability depends on the connection configuration.
- Accessories: Specify a beaker clip, special stem tip, or alternative window if required.
Important: The TI.T20 is intended for laboratory and OEM applications. Confirm the full model code, stem dimensions, connection style, and measuring range before ordering a replacement.
FAQ
Q1: What is the WIKA TI.T20 used for?
It is designed primarily for laboratory applications and OEM equipment requiring local mechanical temperature indication.
Q2: What is the difference between the TI.T20 and TI.20?
The TI.T20 is a thin-stem laboratory thermometer with a plain 7/16-inch hex-hub connection. The TI.20 is an industrial thermometer with a 1/4-inch NPT center-back connection and a more robust industrial configuration.
Q3: Does the TI.T20 require electrical power?
No. Its bimetal measuring mechanism drives the pointer mechanically, so no external power is needed for local indication.
Q4: Can the TI.T20 display both Fahrenheit and Celsius?
Yes. Single-scale Fahrenheit or Celsius versions and dual-scale versions are available, depending on configuration.
Q5: What information is needed to order the correct TI.T20?
Provide the measuring range, stem length, connection configuration, scale type, and any required accessories. If replacing an existing instrument, a photo of the dial and connection can help confirm compatibility.
