The temperature of the preform in the burner zone, where the deposition takes place, is one of the critical control parameters which determines fibre strength and transmission quality. The deposition process typically uses either inside vapour deposition or outside vapour deposition, depending on the geometry and the requires preform structure.
Accurate surface temperature measurement can only be achieved using non-contact radiation thermometers and experience in this application has shown that a pyrometer operating in the waveband 4.8 to 5.2 μm is the most suitable.
In this waveband, the preform is opaque and the measurement unaffected by the flames. The VDT+ vapour deposition thermometer is able to sight precisely onto the rotating preform and avoid the effects of the flames, as the burner is traversed along the lathe. An accurate sighting facility and small target capability are given by focusable optics with a narrow field of view.
Individually calibrated thermometers are available with traceability to National Standards. UKAS or NIST Calibration certificates are available.
Precision Targeting with Through-the-Lens Sighting
The fully focusable optics combined with through-the-lens (TTL) sighting allow operators to precisely align the pyrometer with the target area. This ensures accurate temperature readings even in complex or confined environments, enhancing measurement confidence and reducing setup time.
Versatile Mounting for Any Application
Designed with flexibility in mind, the pyrometer supports a wide array of high-performance mounting accessories. This adaptability makes it easy to integrate into diverse industrial setups, from fixed installations to mobile platforms, ensuring optimal positioning and performance in any scenario.
Built to Endure: Rugged and Modular Construction
Engineered for durability, the pyrometer features a robust and modular design that withstands harsh industrial environments, including high temperatures, dust, and vibration. Its modularity also allows for easy maintenance and upgrades, extending the product’s lifecycle and reducing downtime.
Consistent Accuracy for Maximum Yield
With low drift and high reliability, the pyrometer delivers consistently accurate temperature readings. This precision supports process optimization, reduces waste, and ensures high product yield, making it ideal for quality-critical applications.
Seamless Integration with 4–20 mA Output
Equipped with an industry-standard 4–20 mA analogue output, the pyrometer easily integrates into existing process monitoring, recording, or control systems. This compatibility ensures smooth data communication and simplifies system design and maintenance.
LAND’s VDT+ delivers precise measurement and control of preform temperature during the various deposition processes employed.