Quartz Tube Bi-Colour Level Gauges
Quartz tube bi-colour level gauges are reliable and highly visible liquid level measurement instruments designed for continuous level indication in industrial process applications. By utilizing a quartz glass tube combined with a bi-colour indication system, these level gauges clearly display vapor and liquid phases, ensuring safe and accurate monitoring under high temperature and high-pressure conditions.
The bi-colour quartz tube level gauge displays red for vapor phase and green for liquid phase, allowing operators to instantly distinguish fluid states even in harsh environments. With excellent corrosion resistance, pressure resistance, and long service life, quartz tube bi-colour level gauges are widely used in petrochemical, power generation, chemical processing, and other safety-critical industries.
Key Features
Clear indication, good sealing
High working temperature: up to +450℃
It can match the LED light, strength the visible performance
High working pressure: up to PN100
Long lifetime, simple structure, easy cleaning and maintenance
There are two steel ball in the valve at the both sides. When quartz tube happened to explosion, Steel balls can automatically block channel to avoid liquid flow away if the pressure difference between inside and outside is above 0.3Mpa.
Specifications
| Recommended C-C distance: | 300, 500, 800, 1100, 1400,1700, 2000mm(For other length can be customized) |
| Indicate mode: | Single color, bi-color
(red as vapor phases, green as liquid) |
| Material: | 304,316L, 1Cr18Ni9Ti, 0Cr18Ni9, 304 with PTFE lining |
| Nominal pressure: | PN6-PN100(×0.1MPa)
304 +PTFE≤PN40 PP≤PN16 |
| Working temperature: | Stainless steel ≤450℃
304+PTFE ≤150℃ PP≤100℃ |
| Drain valve: | drain plug / valve (or customize) |
| Vent valve: | vent plug / valve (or customize) |
| Process flange: | DN20/RF HG/T 20592-09 (or customize) |
| The heat steam interface: | ZG1/2＂External thread |
| Tracing steam pressure: | Up to 1.0Mpa |
| Steel ball self-closing pressure: | ≥0.3MPa |
| Light: | LED(standard: 24VDC), 90~250VAC |
| Environment temperature: | -40~+60℃ |
What are quartz tube bi-colour level gauges used for?
Quartz tube bi-colour level gauges are used for continuous visual liquid level monitoring in industrial vessels, boilers, and tanks. They provide clear red and green colour indication to distinguish vapor and liquid phases, making them suitable for high-temperature and high-pressure process control applications.
How does a bi-colour quartz tube level gauge indicate liquid level?
A bi-colour quartz tube level gauge works based on optical refraction and reflection. The liquid phase reflects light as green, while the vapor phase appears red, allowing operators to clearly identify liquid levels even under harsh operating conditions.
What is the maximum working temperature of quartz tube bi-colour level gauges?
The maximum working temperature depends on the material selection. Carbon steel models can operate up to 350℃, stainless steel models up to 450℃, and PTFE-lined versions up to 200℃. This makes quartz tube bi-colour level gauges suitable for high-temperature industrial environments.
Are quartz tube bi-colour level gauges suitable for high-pressure applications?
Yes. Quartz tube bi-colour level gauges support nominal pressure ratings from PN6 to PN100, making them suitable for a wide range of high-pressure industrial applications, including boilers, petrochemical systems, and power plants.
Can quartz tube bi-colour level gauges be customized?
Quartz tube bi-colour level gauges can be customized in terms of center-to-center distance, materials, pressure rating, heating method, valve configuration, and flange standards to meet specific process requirements and operating conditions.
What safety features are included in quartz tube bi-colour level gauges?
Most quartz tube bi-colour level gauges are equipped with steel ball self-closing safety devices, drain and vent valves, and optional heating systems. These features enhance operational safety and reliability in safety-critical and process control applications.
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