Liquid Level Indicators

Hydraulic level indicators, also known as fluid level indicators, are used for checking the fluid levels in tanks and other hydraulic systems. Level indicators and level gauges are fitted onto the system and usually feature a glass window to display the level of the fluid.

Types of hydraulic level indicator:

There is a wide range of liquid level indicators for different applications. Some offer a visual check, while others display more more information, such as a gauge or a thermometer to also show temperature levels. The main types include:

  • Column level indicators use a transparent column to display the fluid level using a scale. Column level indicators come in a variety of lengths depending on the scale they can measure. The scale length can vary, for example, from 30 mm to 200 mm. Your choice of scale length will depend on your chosen application.
  • Sight Glasses, also known as oil sight glasses, are transparent windows which are attached to a tank as a visual level indicator. Oil level sight glasses are a quick way to check oil levels, but do not feature a scale like a column indicator would. Sight glasses usually attach to the system using a threaded connection featuring a rubber seal. Some oil level indicators also feature a metal contrast screen and a level point for easy measuring.

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Description Price Connection Thread Level Indicator Type Scale Length Sight Gauge Material Screws and Fittings Material Maximum Operating Temperature Minimum Operating Temperature Connection Thread Size Connection Thread Standard Seal Material
RS Stock No. 196-2757
Mfr. Part No.FL.69221
BrandParker
£25.07
Each
Units
- Column Level Indicator 161mm - - +90°C -30°C - - -
RS Stock No. 196-2763
Mfr. Part No.FL.69321
BrandParker
£31.21
Each
Units
- Column Level Indicator 254mm - - +90°C -30°C - - -
RS Stock No. 331-9559
Mfr. Part No.FL.69313
BrandParker
£24.68
Each
Units
M12 Column Level Indicator 202mm PA (Lens & Base), Polystyrene (Shroud) Steel +90°C -30°C M12 Metric -
RS Stock No. 331-9543
Mfr. Part No.FL69213
BrandParker
£21.69
Each
Units
M12 Column Level Indicator 74mm PA (Lens & Base), Polystyrene (Shroud) Steel +90°C -30°C M12 Metric -
RS Stock No. 331-9537
Mfr. Part No.FL69113
BrandParker
£18.09
Each
Units
M12 Column Level Indicator 30mm PA (Lens & Base), Polystyrene (Shroud) Steel +90°C -30°C M12 Metric -
RS Stock No. 196-2735
Mfr. Part No.S.690053
BrandParker
£21.50
Each
Units
- Column Level Indicator 76mm - - +90°C -30°C - - -