Unibloc Sight Glasses
Unibloc’s sight glasses are designed for use in the pharmaceutical, biotech, food and beverage, chemical and personal care industries, helping professionals meet their manufacturing needs for a wide variety of liquid types and processing requirements. Each of Unibloc’s sight glasses offers a stainless-steel construction, electropolished components and fine surface finishes as standard features that provide for enhanced durability and expert craftsmanship.
Unibloc offers two types of sight glasses: the Bulls-Eye and the In-Line, both of which offer superior performance for high and low pressure applications.

Sight Glasses
Our Bulls-Eye sight glass is fitted with two rigid glass view-ports on opposite sides for versatility in positioning the equipment as needed. Inside the retainers are gaskets, as well as a fine threaded ring that keeps the glass disks in place. The Bulls-Eye sight glass is ideal for extra protection during monitoring and observing your active process.
Features and Benefits
- Two rigid glass view-ports on opposite sides
- 304 or 316L stainless steel
- O-ring elsastomers available in EPDM, Silicone or Viton
- Polish up to 15 Ra and/or electropolishing
- Hastelloy-C and AL6XN material
- Elastomers of USP Class VI material
- Borosilicate glass available for temperatures from 250 degrees Fahrenheit up to 550 degrees F
- Acrylic glass available
- Material test report available
The In-Line sight glass consists of a glass tube compressed between two flanges, with a double nut tensioning to prevent over-tightening of the glass. It includes an electropolished stainless-steel grid around the tube as a safety precaution, and the standard sanitary connection of a Tri-Clamp. The In-Line sight glass is ideal for efficient viewing while supervising your active process.
Features and Benefits
- Double nut tensioning prevents over-tightening of the glass
- Electropolished stainless steel grid around the tube
- 304 or 316L stainless steel
- O-ring elastomers available in EPDM, Silicone of Viton
- 316L cone shaped strainer cartridge available in multiple mesh sizes – 3″ and up
- Polish up to 15 Ra and/or electropolishing
- Hastelloy-C and AL6XN material
- Elastomers of USP Class VI material
- Borosilicate glass available for temperatures 150 degrees F up to 550 degrees F
- Acrylic glass available
- Optional drain available
- Material test report available