Sight Glass Manufacturing Services — OEM, Wholesale & Technical Support
SIGHTSPEC is an industrial sight glass manufacturer serving OEM equipment builders, distributors, plant operators and line builders — three service lines cover the whole journey from custom design to after-sales.
Our Manufacturing Services
Every service line is backed by the same factory: borosilicate and soda-lime glass processing, stainless steel fabrication, pressure testing and export documentation under one roof.
OEM / ODM Customization
Sight glasses built to your drawing — custom sizes from 1/4" to 12", glass selection for temperature and media, flange drilling, hygienic finishes and private-label branding.
- MOQ from 10 pieces, samples first
- Custom sizes, materials & gaskets
- Drawing → sample → production in 15–30 days
Wholesale & Distribution
Factory-direct sight glass supply for resellers: tiered volume pricing from a 10-piece MOQ, regional distributor agreements, stock cooperation and private-label programs.
- MOQ from 10 pieces, samples available
- Tiered volume discounts
- Territory protection for distributors
Technical Support
Selection help, CAD drawings, installation and torque guidance, gasket selection and after-sales glass replacement — from the engineers who build the windows.
- Selection answers within 24 hours
- CAD drawings before you order
- Glass breakage & gasket service
Why Buyers Choose SIGHTSPEC
The same factory, quality system and export team supports every program — whether you order ten windows or ten thousand.
Factory Direct, No Middlemen
You deal with the factory that cuts, fuses and pressure-tests the glass. No trading company layers and no margin stacking — the engineers who answer your questions are the people who build the product.
Real Published Specifications
Borosilicate to DIN 7080, tri-clamp ratings to 572°F (300°C), threaded windows to 100 bar, USP Class VI and FDA-compliant materials on hygienic models. The numbers we publish are the numbers we build and test to.
Dedicated Export Team
The export team handles inquiries, drawings, documentation, packaging, shipping and after-sales in English — from the first quotation to repeat orders and spare glass.
Tested Before Shipment
Every window is pressure-tested and inspected before packing, with batch traceability, material certificates and test reports included with your shipment.
SIGHTSPEC windows serve pharmaceutical, food & beverage, chemical processing and oil & gas plants worldwide. Read the blog for application guides, or get to know the factory behind the brand.
How to Start
Whether you need a custom window for a new vessel or a steady wholesale supply line, the starting point is the same — an inquiry with your requirements.
Send Your Inquiry
Tell us the product type, size, connection, pressure/temperature and expected volume. You receive a quotation and a technical answer within 24 hours.
Confirm the Specification
We confirm the datasheet, drawing and lead time for your configuration. Standard models ship fast; custom OEM builds move directly into sampling.
Sample or Production
OEM projects start with samples for your validation. Wholesale and stock orders go straight to production with 100% pressure testing on every window.
Delivery & After-Sales
Every order ships with test certificates and packing lists. Technical support continues after delivery for installation, gasket selection and replacement questions.
Which Service Fits Your Project?
Send your sight glass requirement — size, connection, pressure, volume — and we recommend the right program within 24 hours.