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
kr 225,44
Each
Units
- Column Level Indicator 161mm - - +90°C -30°C - - -
RS Stock No. 414-6481
Mfr. Part No.3723794
BrandWIKA
kr 121,80
Each
Units
G 1/2 Column Level Indicator - - - +120°C 0°C 1/2 in G -
RS Stock No. 283-3076
Mfr. Part No.13721
kr 23,12
Each (In a Pack of 2)
Units
G 3/4 Plug Level Indicator - - - +100°C - 3/4 in G Nitrile Rubber
RS Stock No. 196-2735
Mfr. Part No.S.690053
BrandParker
kr 185,62
Each
Units
- Column Level Indicator 76mm - - +90°C -30°C - - -
RS Stock No. 283-3048
Mfr. Part No.13671
kr 15,625
Each (In a Pack of 2)
Units
G 3/8 Plug Level Indicator - - - +100°C - 3/8 in G Nitrile Rubber
RS Stock No. 283-3026
Mfr. Part No.11363
kr 552,92
Each
Units
M12 Column Level Indicator 203mm PA Based Polymer Stainless Steel +80°C -15°C M12 Metric -
RS Stock No. 914-9602
Mfr. Part No.GN.37476
kr 221,59
Each
Units
G 1 Sight Glass - - - +180°C - 1 in G Stainless Steel
RS Stock No. 283-2972
Mfr. Part No.11351
kr 201,99
Each
Units
M12 Column Level Indicator 80mm PA Based Polymer Zinc Plated Steel +80°C -15°C M12 Metric -
RS Stock No. 914-9612
Mfr. Part No.GN.37548
kr 113,83
Each
Units
M16 Sight Glass - - - +100°C - M16 x 1.5 Metric Stainless Steel
RS Stock No. 914-9637
Mfr. Part No.GN.37552
kr 179,16
Each
Units
M26 Sight Glass - - - +100°C - M26 x 1.5 Metric Stainless Steel
RS Stock No. 283-3054
Mfr. Part No.13691
kr 17,165
Each (In a Pack of 2)
Units
G 1/2 Plug Level Indicator - - - +100°C - 1/2 in G Nitrile Rubber
RS Stock No. 914-9466
Mfr. Part No.13742
kr 36,98
Each
Units
G 1 Sight Glass - - - +100°C - 1 in G -
RS Stock No. 914-9606
Mfr. Part No.GN.37478
kr 292,68
Each
Units
M42 Sight Glass - - - +180°C - M42 x 1.5 Metric Stainless Steel
RS Stock No. 153-3750
Mfr. Part No.14481-EX
kr 1 275,33
1 Bag of 10
Bag(s)
G 3/4 Sight Glass - - - +80°C - 19.05 mm G Nitrile Rubber
RS Stock No. 331-9543
Mfr. Part No.FL69213
BrandParker
kr 196,61
Each
Units
M12 Column Level Indicator 74mm PA (Lens & Base), Polystyrene (Shroud) Steel +90°C -30°C M12 Metric -
RS Stock No. 914-9573
Mfr. Part No.111021-NP
kr 389,11
Each
Units
M12 Column Level Indicator 120mm - Zinc Plated Steel +100°C -30°C 12 Metric -
RS Stock No. 287-0148
Mfr. Part No.10901
kr 19,87
Each (In a Pack of 2)
Units
G 1/2 Sight Glass - - - +110°C - 1/2 in G Nitrile Rubber
RS Stock No. 914-9589
Mfr. Part No.GN.37464
kr 131,57
Each
Units
G 3/8 Sight Glass - - - +180°C - 3/8 in G Stainless Steel
RS Stock No. 283-2988
Mfr. Part No.11361
kr 375,26
Each
Units
M12 Column Level Indicator 203mm PA Based Polymer Zinc Plated Steel +80°C -15°C M12 Metric -
RS Stock No. 914-9564
Mfr. Part No.111034
kr 666,41
Each
Units
M12 Column Level Indicator 198mm - Zinc Plated Steel +100 °C, +130°C -30°C 12 Metric -