GrandMfg® Liquid level indicator sight glass window gauge

GrandMfg® sight glasses allowed directly to see the liquid or oil within industrial pipes systems,tanks, and vessels etc. These sights have a glass window. Screw them into threaded holes on tanks, gear cases,gear unit, bearing housings, blower,pump and mixers to see inside liquid level. 

Custom safety sight glasses can be designed to meet your exact specifications with different thread size and thread type. No thread for press fitting or welding is also no problem.

Application:Pump,Receivers,Tanks,Gearbox,Speed reducer,Worm gearbox, helical gear boxes, variable speed motor, automotive Worm gearboxes,Compressor,blower,Gear unit and Power Transmission. 

Advantages of our GrandMfg® Sight Glass: 

1) Tempered Glass is better than a polypropylene glass

Withstand higher temperature and never age and color change.

Natural glass Will not be corroded and will not chemically react with various oils and various liquids.So our sight glass an have the same life time with your requirements even more long life time than the equipment.

2) Max dimensions of sight window of each size.

We design all of our sight glasses to have a max sight window for viewing.It is very important for you to see clear inside especially when choose the small size.

3) different metal material body of sight glass

Metal body is more stronger and better metal perform to meet different working condition.Customer can choose the right metal sight glass for their application.

a) Brass HPb57-3 or other brass free of lead.

b) Aluminum 6061-T6

c) Stainless steel 304 /316

d) Steel plated(Zinc plated,Nickel plated or chrome plated)

4) Stainless steel 304 Reflector / the same material of the body as a whole.

It is easy to see the color of oil or liquid and view the level of liquid inside of the the housing of the devices. Stainless steel 304 reflector have a prefect function in corrosion resistant, never age and color change.

5) Ball indicator inside of our sight glass.

Ball indicator for easier viewing at a distance and the liquid level of the sight glass.We will offer different color ball to meet your liquid color. Make sure the liquid inside is easy to view even in a dark light.

How to choose a right sight glass for your application.

We should consider of the working condition and your equipment when you choose a sight glass.There are many factors.It is not a easy

1) Working temperature range:

Include two temperature:Device placement temperature and the liquid inside temperature when your device working.

2) Max working pressure.

It means the sight glass should be working max pressure.

3) Working humidity

Different metals have different anti-corrosion properties. You can choose the right metal sight glass to meet your application. For example, You can choose stainless steel 304 or 316 when your devices will place on the seaside.

4) Choose the right body of sigh glass

A) Function,metal preform and preference

B) Metal density. Such as:Aluminum is have low density.It is better for automobile's lightweight requirements

C) Metal should be friendly with the liquid size or the liquid should be use for testing or washing your devices during the processing of production.

5) Seal working temperature range

Different seal have different working temperature range and the friendly liquid. To avoid liquid corrosion to sealing rubber.