BL101-2 Integrated Union Sight Glass Light

The Borlan Fluid BL101-2 integrated union sight glass light combines an LED inspection light with a stainless-steel union sight glass assembly. It gives operators a direct illuminated view into tanks, mixers, reactors and other process vessels when ambient light is insufficient. The upgraded compact structure is available from DN50 to DN150, with a standard 3W LED, 12–24V or separately configured 220V power options, and 3500K or 5000K light.

Because the lamp, viewing window and union body work as one assembly, selection must cover both the electrical configuration and the process-contact structure. Borlan Fluid can review the vessel connection, material, glass, gasket, pressure, temperature, cleaning method and viewing task before confirming the quotation and production drawing.

What Is the BL101-2 Integrated Union Sight Glass Light?

The BL101-2 is an upgraded illuminated union sight glass for direct observation inside a vessel. Its LED light is mounted on the sight glass cover and directed through the window, while the remaining transparent area provides the operator’s viewing path. This compact arrangement can reduce the space required for a separate inspection lamp and bracket.

A union-style assembly uses a removable retaining structure around the circular viewing window. The exact mating dimensions, welding interface and service procedure must match the vessel design. Before opening or servicing any sight glass, the equipment must be isolated, depressurized, drained and made safe according to the plant procedure.

Key Features

• Integrated lighting and viewing: one compact assembly provides both illumination and a direct line of sight into the vessel.
• Upgraded BL101-2 design: stainless-steel LED lamp body mounted on a union sight glass structure.
• Standard 3W LED: suitable for routine observation at a defined inspection point; other power requirements need technical confirmation.
• Power options: 12–24V or a separately configured 220V version, selected according to the site power supply.
• Two reference color temperatures: 3500K or 5000K for different observation preferences.
• DN50–DN150 range: six catalog sizes support different vessel openings and viewing requirements.
• Optional wiper from DN80: a wiper arrangement can be discussed where deposits may obstruct the viewing surface.
• Material selection: SS304 or SS316L options can be reviewed for the body and product-contact parts.
• Project configuration support: Borlan Fluid can confirm the connection, seal, electrical version and supply scope before production.

Technical Specifications

The 12–24V and 220V products are separate electrical configurations. Do not connect the light until the delivered nameplate, wiring information and site supply have been checked. Published reference output is not a guaranteed measurement for every voltage, color temperature or customized optical arrangement.

Reference Dimensions

Dimensions are catalog reference values and may change with the connection, material, lamp configuration or optional wiper. Request the approved drawing before machining or welding the vessel connection and before confirming surrounding equipment clearance.

How the Union Sight Glass Structure Helps

The circular union structure provides a compact inspection point for a tank or vessel. It supports direct viewing while holding the transparent window and seal within the assembly. The integrated light adds illumination without requiring a separate external bracket.

“DN100” alone is not enough to prove that a replacement unit will fit. Buyers should compare D1, D2, overall height, welding or mating geometry, clear aperture, glass and gasket arrangement. For a broader explanation of connection styles, see our industrial sight glass types guide.

Material, Glass and Seal Selection

SS304 and SS316L can serve different process requirements. The final selection should consider the medium, concentration, cleaning chemicals, temperature and corrosion risk. The body material and the product-contact material must be stated separately when the project requires a specific wetted grade.

Glass type, gasket material, surface finish and pressure or vacuum rating also belong to the complete sight glass selection. These values cannot be determined from the BL101-2 lamp model alone. For hygienic applications, provide the required cleanability, product-contact finish and inspection standard. Our sanitary versus industrial sight glass guide explains the additional information buyers should confirm.

Optional Wiper for DN80 and Above

From DN80 upward, the BL101-2 can be discussed with a wiper arrangement. A wiper may help clear condensation, foam or product deposits from the internal viewing surface, but it is not a universal solution for every medium. Confirm whether cleaning is manual or automated, the expected deposit, seal compatibility, operating pressure and available external space.

The quotation and approved drawing should identify whether the wiper, handle, internal blade and related seals are included. If visibility cannot be restored safely during operation, the process and cleaning procedure must provide another controlled method.

Typical Applications

• Mixing, blending and preparation tanks
• Food, beverage and dairy processing vessels
• Pharmaceutical and cosmetic production equipment
• Reactors, receivers and concentration equipment
• Water-treatment and liquid-handling systems
• Vessels requiring a compact illuminated observation point

Actual suitability depends on the complete configuration. Send the operating and cleaning conditions rather than selecting from a photograph alone.

BL101-2 or an Explosion-Protected Alternative?

The BL101-2 described here is a standard non-explosion-proof sight glass light. If the installation is in a classified hazardous area, the required gas or dust group, zone, temperature class, ambient temperature, IP requirement and destination-market certification must be reviewed separately. Do not use a standard BL101-2 where verified explosion protection is required.

For projects that need a separately documented explosion-protected union sight glass light, review the BL401-3 integrated union sight glass light and request the current certificate for the exact ordered configuration.

Why Work with Borlan Fluid?

Borlan Fluid manufactures sight glasses, sight glass lights and stainless-steel tank accessories. For an integrated assembly, reliable selection depends on matching the lamp, union body, transparent window, seal and vessel interface instead of treating them as unrelated parts.

Our team can review drawings and help define the size, material, power supply, color temperature, cable, wiper and supply scope. This supports clearer quotations, sample approval and replacement matching for equipment manufacturers, distributors and end users.

Videos and Application Updates

See manufacturing updates, application examples and future product demonstrations on the official Borlan Fluid YouTube channel and our LinkedIn page. Ask us for a current BL101-2 product video if your engineering or purchasing team needs a closer structural review.

Frequently Asked Questions

What voltage does the BL101-2 use?

The available configurations are 12–24V or a separately configured 220V version. Confirm the site supply and use the wiring information supplied with the exact product.

Is the BL101-2 explosion-proof?

No explosion-protection claim is made for the standard BL101-2 configuration on this page. Hazardous-area applications require a separately verified model and certificate scope.

Which sizes are available?

The catalog range is DN50, DN65, DN80, DN100, DN125 and DN150. Use the full dimension table and approved drawing for replacement matching.

Can I order SS316L wetted parts?

SS304 and SS316L options can be reviewed. State the required body and product-contact material separately so the quotation and drawing define the correct scope.

Can the BL101-2 include a wiper?

A wiper option can be discussed from DN80 and above. Provide the medium, deposit type, operating conditions and cleaning expectations so the arrangement can be reviewed.

What information is required for a quotation?

Please provide the medium, working pressure or vacuum, operating and cleaning temperature, nominal size, existing mating dimensions or drawing, body and wetted material, glass and gasket requirements, voltage, color temperature, wiper requirement, quantity, destination market and certification requirements.

Request a BL101-2 Configuration Review

Send Borlan Fluid your vessel drawing, required DN size, process conditions and electrical supply. We will help define the BL101-2 integrated union sight glass light configuration, confirm the dimensions and list the agreed supply scope before quotation.