Vertical glass tube level gauge with top and bottom valves and scale plate for industrial vessel liquid level monitoring.
Glass tube liquid level gauge used to display liquid level in an industrial pressure vessel with scale and isolation valves.
Glass tube level gauge detail showing valves, glass tube, and scale plate for visual liquid level measurement in industrial equipment.
Glass tube level gauge structure and installation diagram showing internal components, center-to-center distance, and typical mounting configurations on horizontal and vertical tanks.
Glass tube level gauge working principle diagram showing the gauge installed on the side of a tank. The upper and lower process connections allow the liquid level inside the glass tube to match the actual tank level for direct visual level measurement.

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.



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  • 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

C-C: Max 2000mm
Body material: 304, 316L
Nominal Pressure: 1.6MPa
Operating temperature: <150℃
Process Connection: Flange/Thread
Heating steam interface: RC1/4 female thread
Heating steam pressure: ≤1.0 MPa
Needle valve self-closing pressure: ≥0.3MPa

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.

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.

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.

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.

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.

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.

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