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. 914-9595
Mfr. Part No.GN.37470
kr 197,04
Each
Units
M26 Sight Glass - - - +180°C - M26 x 1.5 Metric Stainless Steel
RS Stock No. 914-9454
Mfr. Part No.13692
kr 23,92
Each
Units
G 1/2 Sight Glass - - - +100°C - 1/2 in G -
RS Stock No. 283-3098
Mfr. Part No.13761
kr 45,595
Each (In a Pack of 2)
Units
G 1-1/4 Plug Level Indicator - - - +100°C - 1-1/4 in G Nitrile Rubber
RS Stock No. 914-9609
Mfr. Part No.GN.37474
kr 221,59
Each
Units
M33 Sight Glass - - - +180°C - M33 x 1.5 Metric Stainless Steel
RS Stock No. 914-9586
Mfr. Part No.GN.37462
kr 131,57
Each
Units
M16 Sight Glass - - - +180°C - M16 x 1.5 Metric Stainless Steel
RS Stock No. 153-3749
Mfr. Part No.14461-EX
kr 1 084,02
1 Bag of 10
Bag(s)
G 1/2 Sight Glass - - - +80°C - 12.7 mm G Nitrile Rubber
RS Stock No. 914-9555
Mfr. Part No.111031
kr 544,28
Each
Units
M12 Column Level Indicator 198mm - Zinc Plated Steel +100°C -30°C 12 Metric -
RS Stock No. 914-9435
Mfr. Part No.11342
kr 171,96
Each
Units
M10 Column Level Indicator 40mm PA Based Polymer Zinc Plated Steel +80°C -30°C 10 Metric -
RS Stock No. 914-9561
Mfr. Part No.111001-NP
kr 321,38
Each
Units
M10 Column Level Indicator 42mm - Zinc Plated Steel +100°C -30°C 10 Metric -
RS Stock No. 331-9559
Mfr. Part No.FL.69313
BrandParker
kr 218,72
Each
Units
M12 Column Level Indicator 202mm PA (Lens & Base), Polystyrene (Shroud) Steel +90°C -30°C M12 Metric -
RS Stock No. 914-9432
Mfr. Part No.11352
kr 208,84
Each
Units
M12 Column Level Indicator 80mm PA Based Polymer Zinc Plated Steel +80°C -30°C 12 Metric -
RS Stock No. 914-9558
Mfr. Part No.111014
kr 490,19
Each
Units
M12 Column Level Indicator 71mm - Zinc Plated Steel +100 °C, +130°C -30°C 12 Metric -
RS Stock No. 287-0154
Mfr. Part No.11001
kr 33,16
Each (In a Pack of 2)
Units
G 3/4 Sight Glass - - - +110°C - 3/4 in G Nitrile Rubber
RS Stock No. 914-9545
Mfr. Part No.111005
kr 588,36
Each
Units
M10 Column Level Indicator 42mm - Stainless Steel +100 °C, +130°C -30°C 10 Metric -
RS Stock No. 914-9615
Mfr. Part No.GN.37479
kr 292,68
Each
Units
G 1-1/4 Sight Glass - - - +180°C - 1-1/4 in G Stainless Steel
RS Stock No. 914-9592
Mfr. Part No.GN.37468
kr 144,75
Each
Units
G 1/2 Sight Glass - - - +180°C - 1/2 in G Stainless Steel
RS Stock No. 914-9577
Mfr. Part No.111031-NP
kr 455,71
Each
Units
M12 Column Level Indicator 198mm - Zinc Plated Steel +100°C -30°C 12 Metric -
RS Stock No. 287-0176
Mfr. Part No.11111
kr 38,21
Each (In a Pack of 2)
Units
G 1-1/4 Sight Glass - - - +110°C - 1-1/4 in G Nitrile Rubber
RS Stock No. 914-9628
Mfr. Part No.GN.37551
kr 188,84
Each
Units
G 3/4 Sight Glass - - - +100°C - 3/4 in G Stainless Steel
RS Stock No. 196-2763
Mfr. Part No.FL.69321
BrandParker
kr 270,79
Each
Units
- Column Level Indicator 254mm - - +90°C -30°C - - -