The G27 Mini Gauge

A simple but effective tubular liquid level gauge

Product Description

The G27 Mini Gauge

¹Maximum temperature is dependent on the sight tube and seal materials selected.
²Maximum allowable operating pressure is dependent upon operating temperature and sight tube material, contact Seetru for full information.

The Seetru Mini gauge is a simple but effective tubular liquid level gauge. It has valveless end connections that screw directly into the tank and is commonly used for small water tanks and compressor lube oil tanks but can be used for a variety of other fluids as it can be supplied with a choice of end unit, sight tube, and seal materials.

If you require a tubular level gauge with isolation valves please see either the Quickmount (G22) or the CPI (G23) gauges.

The Seetru G27 Mini Gauge

Technical Information for the Seetru G27 Mini Gauge

  • Maximum Temperature
    180°C ¹
  • Maximum Pressure
    19 bar ²
  • Valve Materials
    Nickel plated brass, or Stainless steel
  • Connections
    ¼" BSP, M12 or ½" - 20 UNF threads
  • Seal Materials
  • Tube Material
    Borosilicate glass, or polycarbonate plastic
  • Guard Tube Material
    Polycarbonate as standard (Metal guard available on request)
  • Lengths
    Minimum 100mm / Maximum 1000mm
  • Valve Types


Ease of viewing
The level of colourless liquids is indicated by the magnification of a coloured strip on the sight tube.

Open circuit design
An open circuit gauge is also available, this is where only the bottom
connection penetrates the tank wall. This is only allowable when it is possible for the gauge column to extend above the maximum filling level of the tank.

Where a measure of the precise storage volume is required an engraved scale plate can be provided.

High-pressure version
The maximum working pressure for the standard gauge is 19 bar., however, a high-pressure version suitable for up to 30 bar. is available upon request



Clear Confidence

Don’t let complexity deter you. Simple level gauges offer accurate and reliable readings of your liquids, perfect for basic monitoring in tanks, barrels, and equipment. See what you need, clearly and efficiently.


View or Download the Type G27 Mini Gauge Datasheet

Full Technical Information

View or Download the Type G27 Mini Gauge

Seetru offers a wide range of downloadable datasheets for our products, including safety relief valves, liquid-level gauges, and sight glasses.  These datasheets provide detailed information on the technical specifications, features, and applications of Seetru products.  They are an essential resource for engineers, designers, and other professionals who need to select the right Seetru products for their specific needs.


Find your PDF Download for the G27 Mini Gauge below…
Visit our downloads page for other Seetru product brochures and catalogues
Visit Our Downloads Page View the Type G27 Mini Gauge Datasheet