Bi Color Level Gauge Manufacturer | High Pressure Visual Level Measurement

Accurate level measurement is a critical requirement across industries such as oil & gas, chemical processing, power generation, and marine engineering. Among the various visual level measurement devices available, the bi-colour level gauges stands out as one of the most reliable and intuitive solutions for real-time liquid level indication under demanding operating conditions.

A bicolor level gauge provides immediate visual confirmation of liquid levels by displaying two contrasting colors—typically red and green—making it easy to distinguish between liquid and vapor phases. This article provides an in-depth technical overview of the Bi Color Level Gauge, including its working principle, materials, performance data, customization capabilities, certifications, and manufacturing considerations for global procurement teams.

What Is a Bi Color Level Gauge?

A bi-colour level gauges is a direct-reading level indicator designed for pressurized and high-temperature applications. It uses a combination of optical glass and illumination technology to show different colors depending on whether liquid or gas is present inside the chamber.

• Liquid phase typically appears green or dark

• Vapor or gas phase appears red or bright

This color contrast allows operators to determine liquid levels instantly, even from a distance or in low-light environments.

Unlike transparent level gauges, a bi color level gauge remains readable under extreme process conditions and does not rely on interpretation of meniscus levels, reducing human error.

Working Principle of a Bi Color Level Gauge

The operating principle of a bi color level gauge is based on optical refraction and reflection:

1. The gauge body is connected to the process vessel via top and bottom process connections.

2. Specially designed prismatic or reflex glass elements are installed inside the gauge.

3. When liquid fills the chamber, light is refracted differently than when vapor is present.

4. An external illuminator enhances the contrast between the two phases.

Optical Behavior by Medium

This design ensures stable performance regardless of pressure fluctuations or ambient lighting conditions.

Key Advantages of Bi Color Level Gauge Technology

A bi color level gauge is preferred in many industrial installations due to the following advantages:

• Clear color differentiation for liquid and vapor

• High visibility for remote observation

• Suitable for high-pressure and high-temperature service

• Minimal maintenance requirements

• Long service life in corrosive environments

For safety-critical processes, a bi color level gauge offers dependable visual confirmation without relying on electronic sensors.

Typical Industrial Applications

The bi color level gauge is widely used across industries where reliability and safety are essential:

• Steam drums and boilers

• Chemical reactors

• Oil & gas separators

• Refining and petrochemical units

• Power generation facilities

• Marine and offshore platforms

In these applications, the bi color level gauge serves as either a primary visual indicator or a redundant safety device alongside electronic transmitters.

Materials and Construction Options

Material selection plays a vital role in the performance and lifespan of a bi color level gauge. The gauge must withstand internal pressure, temperature, and chemical exposure.

Common Body Materials

Gauge Glass Types

• Borosilicate glass

• Tempered reflex glass

• Prismatic optical glass

The glass is usually protected by metal covers to enhance operator safety.

Pressure and Temperature Performance Data

A properly engineered bi color level gauge can operate under extreme conditions.

These ranges may vary depending on material selection and design standards.

Illumination Options for Bi Color Level Gauge

Illumination is essential for optimal performance. A bi color level gauge can be equipped with:

• LED illuminators

• Explosion-proof lighting units

• Low-voltage DC power options

Illumination Data Example

Customization and OEM / ODM Capabilities

Customization is a key consideration when sourcing a bi color level gauge for complex projects.

Typical customization options include:

• Center-to-center length

• Process connection standards (ANSI, DIN, JIS)

• Material upgrades

• Special glass configurations

• Integrated switches or transmitters

• Custom mounting brackets

Instrava works closely with OEM partners to develop tailored bi color level gauge solutions that integrate seamlessly into existing systems.

Quality Control and Manufacturing Capacity

Consistent quality is critical for visual level measurement devices. A professional bi color level gauge manufacturer applies strict inspection processes, including:

• Raw material verification

• Pressure testing

• Glass stress testing

• Dimensional inspection

• Final functional verification

Typical Production Capacity Data

Certifications and Compliance Standards

A bi color level gauge used in global projects must comply with recognized international standards.

Common certifications include:

• ISO 9001

• CE

• ATEX (for hazardous areas)

• PED (Pressure Equipment Directive)

These certifications ensure the bi color level gauge meets regulatory and safety requirements across the US, Europe, the Middle East, and global markets.

Why Choose Instrava for Bi Color Level Gauge Solutions

Instrava est un partenaire spécialisé dans la fourniture d'équipements, de solutions et de services pour les instruments de mesure et de contrôle industriels utilisés dans les applications critiques de sécurité et de contrôle des processus.

With a strong emphasis on trust, communication, and collaboration, Instrava delivers bi color level gauge solutions designed for long-term reliability and operational efficiency. As a trusted long-term partner for customers and OEM partners in China, Instrava supports global projects with:

• Stable production capacity

• Consistent quality control

• Engineering-driven customization

• Reliable delivery schedules

• Long-term technical support

Comparison: Bi Color Level Gauge vs Other Level Indicators

This comparison highlights why the bi color level gauge remains a preferred choice in harsh industrial environments.

Installation and Maintenance Considerations

Proper installation ensures long-term performance of a bi color level gauge:

• Ensure correct alignment with vessel nozzles

• Use appropriate gaskets for pressure class

• Install isolation valves for maintenance

• Periodically inspect illuminators and seals

Maintenance requirements are minimal but should follow manufacturer recommendations.

Future Trends in Bi Color Level Gauge Design

Advancements in materials, LED technology, and manufacturing precision continue to enhance bi color level gauge performance. Emerging trends include:

• Improved glass coatings

• Longer-life illumination systems

• Integration with digital monitoring

• Compact designs for space-limited installations

Conclusion

The bi color level gauge remains one of the most reliable and intuitive visual level measurement solutions available today. Its ability to operate under extreme conditions, combined with clear visual indication and robust construction, makes it indispensable in safety-critical industrial processes.

With strong customization capabilities, certified manufacturing, and a commitment to quality, Instrava provides dependable bi color level gauge solutions for global projects requiring accuracy, reliability, and long-term performance.