Transparent Tube / Window: Temperature Range -40°C to +400°C

Component Specifications

Definition

A transparent cylindrical tube or flat window assembly designed for direct visual observation of fluid levels, flow conditions, or process media within tanks, vessels, or pipelines. Typically integrated into level gauges or sight glasses to provide real-time monitoring without requiring electronic sensors.

Working Principle

Operates on the principle of direct visual observation through transparent materials. The component allows light transmission while containing the process fluid, enabling operators to see the fluid-air interface or flow patterns. In level gauges, it utilizes the hydrostatic principle where the fluid level inside matches the external tank level when properly installed.

Materials

Borosilicate glass (temperature resistant), tempered glass (impact resistant), polycarbonate (shatterproof), acrylic (PMMA), quartz glass (high temperature/corrosion resistance), with stainless steel or plastic end fittings.

Technical Parameters

Parameter	Typical range	Notes & selection driver
Length	50-2000 mm
Diameter	6-100 mm
Transparency	>90% light transmission
Wall Thickness	2-10 mm
Pressure Rating	Up to 40 bar
Temperature Range	-40°C to +400°C

Ranges are indicative industry figures for RFQ preparation, not a supplier commitment. Confirm every value and standard with the legal manufacturer before ordering.

Standards

ISO 6552, DIN 7081, ASME B40.100

Parent Products

This component is used in the following industrial products

Level Gauge / Sight Glass

A transparent window or gauge used to visually monitor the liquid level inside a vessel or separator.

View Product Details

Engineering Analysis

Risks & Mitigation

Glass breakage from pressure/temperature shock
Chemical compatibility issues
Gasket failure leading to leaks
Fogging/condensation obstructing view
Scratches reducing visibility

FMEA Triads

Trigger: Thermal stress from rapid temperature changes
Failure: Cracking or shattering of transparent material
Mitigation: Use tempered or borosilicate glass, install thermal shields, implement gradual temperature transitions

Trigger: Chemical incompatibility with process fluid
Failure: Etching, clouding, or degradation of transparent surface
Mitigation: Material compatibility testing, protective coatings, regular inspection schedules

Trigger: Mechanical impact from equipment or tools
Failure: Cracks or breaks compromising containment
Mitigation: Protective guards, polycarbonate alternatives, proper installation clearances

Industrial Ecosystem

Compatible With

Typical Suppliers & Equivalents

Compliance & Inspection

Tolerance

±0.5 mm diameter, ±1% length, flatness within 0.1 mm/m for windows

Test Method

Hydrostatic pressure testing per ISO 6552, visual inspection for defects, light transmission measurement, chemical resistance testing

Procurement Evaluation Criteria

A practical evidence checklist for RFQ preparation and supplier evaluation.

Technical documentation

Request current drawings, revision history, and a signed specification sheet.

Manufacturing capability

Verify equipment lists, process limits, capacity, and representative production evidence.

Inspection readiness

Confirm test methods, calibrated equipment, sampling plans, and traceable reports.

Supplier transparency

Check the legal entity, factory address, ownership, certifications, and direct contacts.

Compare the published product scope and source details, then include your specifications and quantity in an enquiry.

Manufacturers of Transparent Tube / Window

Manufacturer profiles associated with Transparent Tube / Window.

Sourcing Transparent Tube / Window from China?

Tell us your specification and target quantity — we will match it against manufacturer records and come back with the factories that fit.

Request manufacturers We manufacture this

Explore company information and manufacturing capabilities, then discuss the scope of your project with a relevant supplier.

Compiled and source-reviewed by the CNFX editorial team. Each manufacturer above links to the page on that company's own website where the product is listed, with the date we checked it. How we source and review

Related Components

Upper Tool (Punch)

Upper Tool (Punch) is the active forming component in metal plate bending machines that applies precise downward force to create bends in sheet metal.

Main Frame

The main frame is the primary structural component of a hydraulic press, providing rigidity and stability to withstand high compressive forces during metal forming operations.

Shaft Bearing

Precision component supporting rotating shafts in vibration motors to reduce friction and maintain alignment.

Seal Groove

Precision-machined groove in aluminum bearing housings designed to accommodate sealing elements for fluid containment and contamination prevention.

Frequently Asked Questions

What materials are best for corrosive fluids?

Borosilicate glass or quartz glass offer excellent chemical resistance for most corrosive applications. For highly aggressive chemicals, PTFE-coated glass or specialized ceramics may be required.

How do I prevent glass breakage in high-pressure applications?

Use tempered safety glass with proper pressure ratings, ensure correct gasket installation, avoid thermal shock by gradual temperature changes, and install protective shields if needed.

Can transparent tubes be used for food-grade applications?

Yes, with food-grade materials like borosilicate glass (FDA compliant) and proper sanitary fittings. Regular cleaning and inspection are essential for hygiene.

Data Basis

Editorial classification, named public sources where available, and source-reviewed manufacturer records. See the editorial policy.

Preliminary Technical Classification

This page supports structured research, RFQ preparation, and supplier evaluation. It does not replace buyer-led supplier qualification, standards review, or technical approval.

Transparent Tube / Window