The WIKA TI.20 is a mechanical thermometer that uses a bimetal helix to convert temperature changes into pointer movement. It provides direct temperature readings without requiring an external power supply.
Its compact 2-inch dial and rugged stainless steel design make it suitable for installations where space is limited but dependable local temperature indication is required. The rear-center mounting arrangement supports installation in compatible equipment and piping systems.
Key Features
- Measuring principle: Bimetal helix for mechanical temperature indication.
- Dial size: 2 inches (50.8 mm).
- Accuracy: ±1% of full scale, ASME B40.3 Grade A.
- Construction: 304 stainless steel case, stem, and process connection.
- Temperature range: Configurable ranges spanning approximately −100 °F to +1,000 °F, depending on the selected scale.
- Process connection: 1/4-inch NPT, center-back mount.
- Stem dimensions: 1/4-inch diameter, with lengths from 2.5 to 24 inches.
- Environmental protection: Hermetically sealed case design in accordance with ASME B40.3.
- Vibration damping: Inert gel helps minimize pointer oscillation.
- Scale options: Fahrenheit, Celsius, or dual Fahrenheit/Celsius scales.
- Optional features: Special dial markings, acrylic window, and NIST-traceable calibration certification may be available.
Suitable Applications
- Industrial machinery: Local temperature monitoring of equipment and mechanical systems.
- Boilers and heating systems: Monitoring temperature in suitable heating equipment.
- Water systems and piping: Measuring water temperature at compatible installation points.
- Vessels and process equipment: Direct temperature indication in tanks and vessels.
- HVAC systems: Temperature monitoring in heating and air-conditioning installations.
- Microbrewing equipment: Temperature indication in suitable brewing vessels and systems.
- OEM equipment: Integration into machinery and equipment requiring compact dial thermometers.
Technical Highlights & Selection Considerations
Before ordering the WIKA TI.20, confirm the following details:
- Measuring range: Select a scale that covers the expected operating temperature. Available ranges depend on the chosen configuration.
- Dial scale: Choose °F, °C, or dual-scale indication according to operating requirements.
- Stem length: The standard range is 2.5–24 inches. Confirm the required insertion depth.
- Connection: Verify the 1/4-inch NPT center-back connection matches the installation.
- Process medium: Check material compatibility and consider a suitable thermowell where the application involves pressure, corrosive media, or high fluid velocity.
- Vibration: The damping gel helps reduce pointer oscillation, but the suitability of the complete installation should be evaluated under actual vibration conditions.
- Calibration: Specify NIST-traceable calibration certification if required by project or quality procedures.
Important: The TI.20's measuring range, stem length, and scale must be confirmed against the full order code. Do not assume every range is available with every stem configuration.
FAQ
Q1: What is the WIKA TI.20 used for?
It is used for local temperature indication in machinery, boilers, vessels, water systems, piping, HVAC installations, and other suitable industrial applications.
Q2: Does the TI.20 require electrical power?
No. It is a mechanical bimetal thermometer and provides local temperature readings without an external power supply.
Q3: What is the accuracy of the TI.20?
Its specified accuracy is ±1% of full scale according to ASME B40.3, Grade A.
Q4: What stem lengths are available?
WIKA lists stem lengths from 2.5 to 24 inches, with a standard stem diameter of 1/4 inch. Confirm the available length for the required temperature range and configuration.
Q5: Can the TI.20 be installed directly in a process pipeline?
It can be used in compatible installations, but connection dimensions, pressure, temperature, fluid velocity, and material compatibility must be evaluated. WIKA recommends considering a thermowell for pressure, corrosive-fluid, or high-velocity applications.
