Sanitary-grade Flexible Sight Glass Design Features With Scraper And Lighting.

For high-viscosity food processing, the sanitary sight glass with wiper and lamp maintains clear observation through an integrated PTFE wiper blade that removes product buildup from the glass surface and an LED lamp (DC24V) that illuminates the flow path. Constructed from SS304 or SS316L with welded connections, this device operates up to 10 bar with temperature ranges of -10°C to 150°C (standard) or -10°C to 80°C (union with lighting). The wiper actuates manually or pneumatically, enabling continuous visual monitoring without process interruption.

Wiper Mechanism for Viscous Media

Scraper Blade Operation

• The hygienic sight glass uses a stainless steel wiper arm with PTFE or silicone blade that sweeps across the glass interior.

• Manual or pneumatic actuation moves the blade across the viewing area.

• This mechanical cleaning action removes product residue that would otherwise obscure visibility.

• The operation eliminates the need for process interruption during observation.

PTFE Blade Material

• The wiper blade uses PTFE material compliant with FDA 177.2600 standards for food contact.

• PTFE provides chemical resistance to acidic and alkaline products.

• The material maintains flexibility across the -10°C to 150°C temperature range.

• PTFE does not shed particles into the product stream during operation.

Illumination System Design

LED Light Configuration

• The sanitary sight glass integrates an LED lamp within a stainless steel housing, powered by DC24V.

• Options include rechargeable battery operation or fixed cable connection.

• The illumination enables observation of flow characteristics and product condition.

Light Source Placement

• The lamp mounts externally to the sight glass assembly, positioned to direct light through the glass.

• This configuration eliminates internal components that could trap product or harbor bacteria.

• External mounting maintains sanitary conditions inside the process line.

Technical Specifications

Applications in Food Processing

• Dairy processing: yogurt, cream, and condensed milk require visual monitoring for texture and flow consistency.

• Confectionery: chocolate and syrup production benefits from the wiper to maintain clear observation.

• Beverage: fruit juice and concentrate lines use the lamp to detect particulate matter or color variation.

• Brewing: wort and beer filtration stages utilize the sight glass for clarity inspection.

Operational Workflow

1. Media flows through the pipeline, passing the sight glass window.

2. Wiper blade sweeps across glass at set intervals (manual or automated).

3. LED lamp illuminates the flow path for observation.

4. Operator inspects product color, clarity, and flow characteristics.

5. Wiper repeats cycle as needed based on product viscosity.

Installation and Connection

The sanitary sight glass connects via welding, providing a permanent, crevice-free installation. The union-type design allows glass replacement without disturbing pipeline connections. The 2 sanitary sight glass sizes suit small-diameter lines, while the 4 sanitary sight glass and 6 tri clamp sight glass accommodate larger process pipes.

Maintenance and Validation

• Glass inspection: check for cracks or scratches during routine cleaning cycles.

• Wiper blade replacement: PTFE blades require periodic replacement based on wear.

• Lamp maintenance: LED units provide long service life; rechargeable batteries require charging.

• Gasket replacement: PTFE gaskets ensure seal integrity for sanitary conditions.

Engineering Value for Food Processing

The hygienic sight glass with wiper and lamp delivers reliable visual monitoring for viscous food processing. The integrated wiper ensures clear visibility through heavy products, while the LED illumination enables detailed inspection. SS304 and SS316L materials provide corrosion resistance, with welded connections supporting CIP cleaning and sanitary design standards.

Field testing on product samples confirms wiper effectiveness and illumination adequacy. Proper sizing selection ensures full viewing coverage.

1. Select material – SS304 for general service, SS316L for corrosive or high-purity applications.

2. Verify temperature rating – standard for most processes, union+lighting for temperatures below 80°C.

3. Confirm pressure rating against process conditions.

4. Validate weld procedures to maintain sanitary surface finish.

These measures ensure reliable observation. Properly specified sanitary sight glasses deliver clear visibility for quality control and process monitoring in food and beverage applications.

Hygienic Union Type Sight Glass With Wiper And Lamp

• Our Sanitary Sight Glass including Sanitary Welded Sight Glass, Hygienic Clamped Sight Glass, Hygienic Thread Sight Glass, Sanitary Four Way Sight Glass, Sanitary Union Type Sight Glass, Hygienic Sight Glass With Light.
• Sanitary sight glass is designed for sanitary applications required in food, dairy, and pharmaceutical industries.
• It is used to provide 360-degree viewing of material flow in a line.The unit is available in sanitary connection from 3/4" to 6" sizes,and can be supplied with a protective tubing of polycarbonate tubing, acrylic tubing,or slotted stainless steel,depending on temperature requirements.

Product Description