Hydrogen Analyzer

The Hydrogen Meter is a specialized testing device independently designed and manufactured by our company for qualitative detection of hydrogen content in molten casting aluminum. Despite being an economical model, its simple operation and rapid testing capabilities make it the preferred choice for many experienced manufacturers.

Working Principle

Based on the reduced pressure solidification method, the test sample solidifies under vacuum conditions. During this process, hydrogen dissolved in the molten aluminum gradually precipitates, forming bubbles inside or on the surface of the sample. The hydrogen content is evaluated by:

Observing surface irregularities or the number of pores in cross-sectional slices

Checking for cauliflower-like surface appearance (indicating higher hydrogen content)

Determining suitability for casting based on gas porosity levels

Key Features:

Mobile Structure: Enables gas content testing at multiple fixed locations with a single device

Rapid Analysis: Completes aluminum melt analysis within 5 minutes under foundry conditions

Reliable Results: Combines multiple analytical methods for accurate quality assessment and production guidance

Durable Construction:

No consumable parts, low operating costs

Simple operation requiring minimal operator experience (basic training sufficient)

Corrosion-resistant design with minimal maintenance requirements

Robust Vacuum Chamber: Eliminates fragile glass dome components

Environmental Adaptability: Suitable for complex furnace-side environments

Sample Evaluation Methods

A. Surface Observation Method

Examine the top surface of the vacuum-cooled sample:

Cauliflower-like protrusions or significant bulging indicate high hydrogen content

Smooth/slightly concave surface suggests low gas content suitable for casting

B. Cross-Sectional Porosity Analysis

Slice the sample and observe pore distribution

Polish the cross-section, perform acid etching, and evaluate degassing effectiveness according to national pinhole grade standards

C. Aluminum Density Measurement

Weigh the cooled sample (W₁) in air using an electronic balance

Suspend the sample in water with known density and measure submerged weight (W₂)

Calculate hydrogen content using:

Relative Density Method: α = W₂/W₁ (Higher α indicates lower gas content)

Absolute Density Method: ρ = W₁·ρ_water/(W₁-W₂) (Higher sample density correlates with lower porosity)

Technical Parameter