Tubular Oil Level Gauge

The tubular oil level gauge consists of stainless steel end fittings and a transparent tube. The end fittings are available in 304 or 316 stainless steel. Acrylic is the standard tube material, offering good visibility and cost efficiency, while borosilicate or quartz glass is available for applications requiring higher temperature or chemical resistance. These optional materials are quoted separately due to higher material and processing costs.

Precision graduations provide clear level readings. Do not clean the tube with alcohol, as this may cause surface haze or cracking. The gauge is widely used for level monitoring in hydraulic oil tanks, oil storage tanks, and other liquid storage vessels.

Tubular oil level gauge

Specification

Measuring range: Customizable; sample: 0–280 mm
Overall length: Customizable; maximum 100 mm
Tube outer diameter: Ø40, Ø50, Ø60 mm; customizable
Connection: Threaded at both ends; commonly G1/2 and G3/4, with NPT and other threads available
Seals: Standard NBR; optional FKM for enhanced oil and corrosion resistance

Specifications

**Table 1: Tubular Oil Level Gauge Tube Material Specifications**
Parameter	Acrylic Tube (Standard)	Borosilicate Glass Tube (Custom)	Quartz Glass Tube (Custom)
Operating Temperature	-20 °C to +65 °C	-20 °C to +150 °C	-20 °C to +280 °C
Max. Pressure	≤ 0.6 MPa	≤ 1.0 MPa	≤ 1.2 MPa
Compatible Media	Hydraulic oil, clean water, weak acids and alkalis	Oils, water, most weak acids and alkalis	Strongly corrosive and high-temperature media
Advantages	High transparency, cost-effective, easy to process	Heat resistant, scratch resistant, solvent resistant	Excellent heat and chemical resistance

Application

Mining equipment. Lubricating oil level monitoring for ball mill main reducers, vertical mill gearboxes, and roller press gearboxes.
Hydropower. Oil level monitoring for thrust bearing and guide bearing oil reservoirs in hydro-generator units.
Building materials & cement. Oil level monitoring for fan gearboxes and clinker conveyor reducers.
Metallurgy & papermaking. Local and remote level monitoring for large gearboxes and oil tanks in centralized lubrication systems.
Heavy machinery. Oil level monitoring for enclosed gear drives requiring on-site visual inspection and remote electrical monitoring.

Tubular oil level gauge installed on industrial equipment.

On-site application

Tubular oil level gauge installed on heavy machinery.

Customer installation case

An array of tubular gauge glass is vertically placed on the desk.

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