BL401-1 LED Flange Sight Glass Spotlight with Bracket

Compact External Lighting for Sight Glass Inspection

The Borlan Fluid BL401-1 is a compact LED flange sight glass spotlight designed to illuminate an existing inspection window from outside the vessel. The lamp is held by a separate adjustable bracket, allowing the lighting direction to be set toward the viewing area without placing the lamp inside the process or making it part of the pressure boundary.

The confirmed low-voltage configuration accepts 12–24V AC or DC. Available power options are 3W and 7W, with white or yellow light available for different observation tasks. Other voltage arrangements, including 36V and 220V configurations, can be discussed as customized versions. The exact supply method must follow the nameplate and wiring information supplied with the ordered unit.

Key Features

• External illumination: directs light through an existing flange or tank sight glass while remaining outside the wetted and sealing area.
• Adjustable bracket: allows the lamp angle to be set for the available mounting point and required viewing direction.
• Compact LED housing: fits installations where a larger high-power spotlight is unnecessary or available clearance is limited.
• 3W and 7W options: supports standard inspection tasks with two confirmed power choices.
• 12–24V AC/DC input: simplifies integration with common low-voltage industrial power arrangements.
• Selectable light color: white or yellow illumination can be specified according to the contents and observation objective.
• Standard push button: provides local lamp control at the inspection point.

Product Specifications

Reference Dimensions

The current Borlan Fluid catalog lists the following reference dimensions for the BL401-1 flange spotlight. All values are in millimetres.

These are catalog reference dimensions. Lamp and bracket dimensions can change with the selected voltage, power, cable interface or customized mounting arrangement. Request and approve the drawing for the ordered configuration before drilling or machining a mounting point.

Supply Scope and Installation Boundary

The standard product-page scope is one BL401-1 lamp with one separate mounting bracket. The flange sight glass is not included. If you also require a sight glass, Borlan Fluid can review it as a separate item after receiving the connection standard, size, materials and operating conditions.

The BL401-1 lamp is an external accessory. It does not contact the process medium and does not create the vessel pressure or vacuum seal. The sight glass, gasket, cover, bolts or clamp form that sealing boundary. This arrangement allows the lamp to be serviced without opening the vessel when the final mounting design keeps the lamp independent from the sealing components.

How to Confirm Bracket Compatibility

A product name or nominal sight glass size is not enough to guarantee that one bracket fits every installation. Before ordering, provide the outside diameter of the sight glass cover or flange, the mounting-bolt diameter, the distance from the bolt centre to the centre of the viewing window, and a side-view photo or drawing showing the available clearance.

Also state what the operator needs to observe, the vessel depth, the distance from the lamp to the window, and whether the contents are clear, cloudy or opaque. These details help determine the power, light color and mounting direction. Wattage alone does not define the useful illumination at the observation point.

Electrical and Area Classification Notes

For the standard low-voltage version, confirm whether the available source is AC or DC and identify the voltage before production. For a 36V or 220V request, Borlan Fluid will confirm the lamp and any required matched power arrangement. Always connect the delivered unit according to its nameplate and wiring document.

The BL401-1 described on this page is a standard non-explosion-proof sight glass light. Do not use it in a hazardous area based only on its stainless steel appearance. If the installation requires explosion-protection documentation, provide the destination market, required protection concept and area classification so that a configuration with applicable evidence can be reviewed separately.

Why Work with Borlan Fluid

Borlan Fluid manufactures sight glass lights, sight glasses and related stainless steel tank accessories in Wenzhou, China. Our team can review the lamp, bracket and existing sight glass as one installation problem while keeping the supply scope and sealing responsibility clear. This helps equipment builders, distributors and maintenance teams avoid mismatched brackets, unsuitable power arrangements and incorrect certification assumptions.

Voltage, wattage, cable length, light color and mounting details can be reviewed against your application. Send a drawing or installation photo and Borlan Fluid will confirm the proposed configuration before quotation.

Product Videos and Engineering Updates

For product demonstrations, factory footage and new sight glass lighting content, visit the official Borlan Fluid YouTube channel. You can also follow Borlan Fluid on LinkedIn for product and engineering updates. Contact us if you need a video showing a specific BL401-1 voltage, power or bracket arrangement.

Frequently Asked Questions

Is the flange sight glass included?

No. This product-page scope includes the BL401-1 lamp and separate mounting bracket. The flange, glass and sealing components are separate items.

Can the BL401-1 operate on both AC and DC?

The confirmed standard low-voltage configuration accepts 12–24V AC/DC. Use the electrical information supplied with the ordered unit.

Which power options are available?

The confirmed BL401-1 options are 3W and 7W. Provide the observation distance and contents so that the lighting arrangement can be reviewed.

Can I order a 36V or 220V version?

Yes, these voltages can be discussed as customized configurations. The final input method and any matched power equipment must be confirmed before production.

Is the BL401-1 explosion-proof?

No. This page describes the standard non-explosion-proof BL401-1. Hazardous-area projects require a separately verified model and configuration with suitable documentation.

Will the bracket fit my existing sight glass?

Compatibility depends on the flange or cover dimensions, bolt size, bolt-to-window distance and available clearance. Send these measurements and a side-view photo or drawing for review.

Request a BL401-1 Quotation

Send Borlan Fluid the required quantity, available supply voltage and AC/DC source, preferred 3W or 7W power, white or yellow light, required cable length, and a photo or drawing of the mounting area. Please also state whether you need only the lamp and bracket or a separately selected sight glass. We will confirm the proposed configuration and supply scope before quotation.