Level Ultrasonic Sensor: Working Principle, Types & Industrial Applications
Level Ultrasonic Sensor Overview A level ultrasonic sensor is a non-contact device used to measure liquid or solid levels...
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Glass Tube Level Gauge for Accurate Visual Level Measurement
A glass tube level gauge is a simple and reliable visual level indication device used to directly observe liquid levels in tanks, vessels, and industrial systems. By using a transparent glass tube connected to the process vessel, operators can clearly monitor real-time liquid levels without complex instrumentation.
We provide glass tube level gauges designed for stable performance, easy installation, and clear visibility in a wide range of industrial applications.
Level Measuring Instruments Description
Key Features of Glass Tube Level Gauge
Direct visual indication of liquid level
Simple structure with reliable performance
Transparent glass tube for clear observation
Easy installation and maintenance
Suitable for low to medium pressure applications
Cost-effective solution for level monitoring
Typical Applications of Glass Tube Level Gauges
Glass tube level gauges are commonly used in:
Water tanks and storage vessels
Low-pressure industrial tanks
Chemical processing equipment
Utility and auxiliary systems
Non-critical level monitoring applications
How a Glass Tube Level Gauge Works
Direct visual indication of liquid level
Simple structure with reliable performance
Transparent glass tube for clear observation
Easy installation and maintenance
Suitable for low to medium pressure applications
Cost-effective solution for level monitoring
Glass Tube Level Gauge Structural Design
A glass tube level gauge features a simple and robust structure designed for direct visual level indication. The main components typically include:
Transparent glass tube
The glass tube is the core component, allowing operators to visually observe the liquid level. Borosilicate glass is commonly used for its good transparency, temperature resistance, and chemical stability.Upper and lower process connections
These connections link the glass tube to the tank or vessel, ensuring the liquid level inside the tube matches the actual process level based on the communicating vessel principle.Metal body and fittings
The body and fittings are usually made of carbon steel or stainless steel to provide mechanical support and corrosion resistance.Sealing components
Gaskets and seals ensure leak-tight performance during operation.
This straightforward structure allows the glass tube level gauge to operate reliably with minimal maintenance requirements.
Level Measuring Instruments Parameter
| Item | Specification |
|---|---|
| Model | INGT114 |
| Recommended Center-to-Center Distance | 300 mm, 500 mm, 800 mm, 1100 mm, 1400 mm, 1700 mm, 2000 mm (custom made available) |
| Indication Mode | Single color; Bi-color (red for vapor phase, green for liquid phase) |
| Material | Carbon steel; Stainless steel 304 / 316L; 1Cr18Ni9Ti; 0Cr18Ni9; 304 with PTFE lining |
| Nominal Pressure | PN6 – PN100 (×0.1 MPa) 304 + PTFE ≤ PN40 |
| Working Temperature | Carbon steel ≤ 350 °C Stainless steel ≤ 450 °C 304 + PTFE ≤ 200 °C PP ≤ 100 °C |
| Drain Valve | Drain needle valve (customizable) |
| Vent Valve | Vent needle valve (customizable) |
| Process Connection (Flange) | DN20 / RF, HG/T 20592-09 |
| Heating Steam Interface | ZG 1/2″ male screw thread |
| Heating Steam Pressure | ≤ 1.0 MPa |
| Electric Heating | Self-limiting temperature heating (not required for anticorrosive type) |
| Steel Ball Self-Closing Pressure | ≥ 0.3 MPa |
| Power Supply | 24 V DC, 36 V AC |
| Ambient Temperature | –50 °C to +80 °C |
Instrava OEM/ODM
Reliable Instruments. Solutions That Fit Your Application.
Instrava is focused on delivering reliable industrial solutions through carefully curated products, application-driven optimization, and flexible customization. We select proven instruments from trusted manufacturers to ensure consistent quality, optimize solutions based on real working conditions to solve practical challenges, and provide tailored configurations to meet specific application needs.
By combining selection expertise with application understanding, Instrava helps customers reduce risk, improve efficiency, and achieve dependable results in complex industrial environments.
What pressure range can the INGT114 glass tube level gauge support?
The INGT114 glass tube level gauge supports nominal pressures from PN6 to PN100. For configurations with 304 stainless steel and PTFE lining, the maximum nominal pressure is PN40.
Can the INGT114 glass tube level gauge be customized for different center distances?
Yes. The INGT114 glass tube level gauge is available with standard center-to-center distances ranging from 300 mm to 2000 mm, and custom lengths can be manufactured based on installation requirements.
Is the bi-color indication suitable for all applications?
The bi-color indication of the INGT114 glass tube level gauge is suitable for applications where clear phase differentiation is required. Red indicates the vapor phase, while green indicates the liquid phase, improving visibility during operation.
What materials are available for corrosive media?
For corrosive process media, the INGT114 glass tube level gauge can be supplied with stainless steel materials such as 316L or with a 304 stainless steel body featuring a PTFE lining to improve corrosion resistance.
Does the INGT114 glass tube level gauge require electric heating?
Electric heating is optional. The INGT114 can be equipped with self-limiting temperature electric heating when required, while anticorrosive configurations generally do not require additional heating.
What safety features are included in the INGT114 glass tube level gauge?
The INGT114 glass tube level gauge includes a steel ball self-closing mechanism that activates at pressures ≥ 0.3 MPa, helping to reduce liquid leakage in the event of glass tube damage.
Why Choose Instrava
Built on Consistency, Not Claims
Focused on Industrial Applications
We specialize in industrial analysis and detection, with a clear understanding of real-world operating environments and requirements.
Strict Product Selection Criteria
Every instrument is evaluated based on performance, stability, and application suitability—not just specifications or pricing.
Reliable Supply & Quality Consistency
We work with trusted manufacturers to ensure stable supply, consistent quality, and dependable delivery.
Practical, Experience-Based Support
Our recommendations are grounded in application understanding, helping customers avoid common issues and achieve reliable results.
Instrava is built to reduce uncertainty—so every decision you make is clearer, safer, and more reliable.
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