Oil Level Sight Glass for Air Compressors and Industrial Equipment

A Simple Way to Monitor Oil Level

An oil level sight glass is a compact visual indicator used to check the oil level inside equipment without opening the system. It is commonly installed on air compressors, gearboxes, pumps, hydraulic equipment, lubricating systems, and industrial machinery.

The assembly is typically made of metal, glass, and a sealing gasket. The glass provides direct visibility of the oil, while the metal body and gasket help secure the sight glass to the equipment.

What Is an Oil Level Sight Glass Also Called?

Depending on the equipment and industry, it is also called:

· oil sight glass

· oil level indicator

· oil level gauge

· oil sight window

· oil inspection glass

· oil level sight window

· compressor oil sight glass

· gearbox oil level sight glass

These names may refer to similar products, although the exact structure can vary.

Materials for Different Applications

The metal body can be supplied in different materials depending on the working environment and cost requirements.

Common options include:

The viewing glass can be selected according to the required temperature, pressure, oil type, and operating conditions.

Thread Types and Connection Options

Different machines use different connection standards. Common thread options for oil level sight glasses include:

· NPT thread

· G thread / BSPP

· BSP thread

· BSPT thread

· Metric thread

· Custom thread specifications

Common sizes can also be customized according to the equipment connection.

When ordering, it is important to confirm the thread standard, thread size, mounting position, glass diameter, overall dimensions, and working pressure.

Applications

Oil level sight glasses are widely used on:

· Air compressors

· Gearboxes and reducers

· Pumps

· Hydraulic systems

· Lubrication systems

· Industrial machinery

· Oil tanks and reservoirs

For an air compressor oil level sight glass, the correct size and sealing method are particularly important because the sight glass must match the compressor housing and operating conditions.

Customized Oil Level Sight Glass from China

Jinan JSV Industrial Co., Ltd. supplies oil level sight glasses with different metal materials, glass options, thread types, sizes, and sealing configurations.

If you need an oil sight glass for an air compressor, gearbox, pump, or other equipment, please contact us with the drawing, dimensions, thread specification, or sample. We can help confirm the suitable configuration for your application.