APPLICATIONS
Sight Glass Applications by Industry
A sight glass is a simple component with a demanding job: it lets operators see inside a process line without opening it. The right spec depends entirely on the industry — sterile pharma lines, food contact surfaces, corrosive chemicals and high-pressure hydrocarbons all need different glass, metal and connection choices.
BY INDUSTRY
Four Industries, Four Different Specs
Every industry page below explains the specific failure modes buyers hit, the recommended product family, and the selection essentials for that duty. Start with your industry, then confirm with our engineers before you order. If your process spans two industries — a food-grade CIP line with live steam, or a chemical dosing skid sitting in a classified area — read both pages and combine the requirements; the parameter tables and FAQ on each page cover the cross-over questions.
Pharmaceutical
USP Class VI sanitary sight glasses with tri-clamp mounting and heated anti-fog options for sterile lines, bioreactors and CIP/SIP duty.
SG-100 Tri-Clamp →🥛Food & Beverage
Hygienic sight glasses and flow indicators for dairy, brewing and beverage lines — 304/316L finishes and sanitary connections.
SG-100 / SG-200 →🧪Chemical Processing
Borosilicate sight glasses in threaded and flanged form for corrosive media and high-pressure reactor and pipeline observation.
SG-300 / SG-400 →🛢️Oil & Gas
High-pressure flanged and threaded sight glasses in carbon steel or stainless for separators, scrubbers and pipelines.
SG-400 / SG-300 →Food & beverage application page is under construction — the recommended models and selection criteria are shown in the comparison table below.
COMPARISON
Industry Comparison: Connections, Glass and Metal
A quick matrix of what each industry typically demands. It is a starting point, not a substitute for a media and duty review — send your operating conditions and our engineers will confirm the specification.
| Industry | Typical Connections | Glass | Metal | Recommended Models |
|---|---|---|---|---|
| Pharmaceutical | Sanitary tri-clamp (1/2"–12") | Borosilicate (DIN 7080) | 316L SS | SG-100 (+ heated anti-fog) |
| Food & Beverage | Tri-clamp / threaded | Borosilicate / soda lime | 304 / 316L SS | SG-100, SG-200 |
| Chemical Processing | Threaded NPT/BSP, flanged ANSI/DIN | Borosilicate / quartz | 316 SS / Hastelloy / carbon steel | SG-300, SG-400 |
| Oil & Gas | Flanged ANSI Class 150/300, threaded | Borosilicate / quartz | Carbon steel / 316 SS | SG-400, SG-300 |
WHY SPECS DIFFER
What Drives a Sight Glass Specification
Behind the same-looking window are three variables that change completely between industries. The connection must match the piping standard of the plant — sanitary tri-clamp on pharma and food lines, NPT or BSP threaded on small chemical and utility lines, ANSI or DIN flanged on process vessels and oil and gas mains. The glass must survive the media and the cleaning regime — borosilicate to DIN 7080 is the default, quartz extends the temperature range, and soda-lime is only for mild, low-temperature duty. The body metal is a cost-versus-compatibility decision — 316L for sterile and corrosive service, 304 or 316 stainless for food contact, carbon steel for dry hydrocarbons.
Get those three right and the sight glass is a fit-and-forget component until the next inspection. Get them wrong and you are chasing leaks, fogged windows or etched glass within months. That is why we publish an application page per industry instead of one generic product page: the failure modes, the recommended models and the selection checklists genuinely differ, and a correct first specification is cheaper than a field replacement.
SCOPING
How We Scope an Application
Every sight glass we quote starts from the same five questions. Answer them and you are 90% of the way to a correct specification:
- Media: what is inside the line or vessel — including concentration and any solids?
- Pressure and temperature: operating conditions plus the worst-case upset?
- Connection: tri-clamp, threaded, flanged, or weld — and the size?
- Mounting: new installation on a nozzle, or retrofitting into an existing line?
- Environment: washdown areas, classified zones, steam exposure, cold climates?
Not sure which product family fits? Start from the product overview, or send the five answers above to our export team — you will get a recommended model and quotation within 24 hours. For OEM and private-label programs, the OEM/ODM service covers custom tube lengths, lighting, gasket selection and brand marking on any of the recommended models.
Not Sure Which Sight Glass Fits Your Application?
Send your media, pressure, temperature and connection — get a recommendation and quotation within 24 hours.