ABB HME0300D AlSCAN Hydrogen Measurement Probe for Aluminum Foundry Alloys

ABB HME0300D is a dedicated hydrogen measurement probe for the ABB
AlSCAN system, a measurement platform designed for direct determination
of hydrogen in liquid aluminum. The HME0300D probe is specifically
associated with wrought and foundry alloy applications and forms the
sensing interface between the molten aluminum and the AlSCAN hydrogen
analyzer.

Hydrogen concentration is an important parameter in molten aluminum
because dissolved hydrogen can influence the quality and internal
characteristics of cast products. The AlSCAN measurement method uses
an immersed probe to bring carrier gas into contact with the molten
metal. Hydrogen from the melt enters the gas loop until equilibrium is
reached, allowing the analyzer to determine the hydrogen concentration
associated with the liquid aluminum.

ABB HME0300D Product Overview

The ABB HME0300D belongs to the family of AlSCAN probes developed for
direct hydrogen measurement in liquid aluminum. ABB identifies three
primary AlSCAN probe models: HME0200D, HME0300D, and HME1200D. Each
model is intended for a particular range of metallurgical applications.
HME0300D is the probe configuration intended for wrought and foundry
alloys, while HME0200D is associated with wrought alloy applications
and HME1200D is designed for longer immersion and specialized alloy
applications.

The HME0300D is therefore an application-specific measurement probe
rather than a general-purpose temperature or process sensor. Its
construction and operating characteristics are designed around the
requirements of hydrogen analysis in molten aluminum. This dedicated
design allows the probe to operate as part of the closed-loop
measurement principle used by the AlSCAN analyzer.

ABB documentation identifies HME0300D as being made from recrystallized
silicon carbide, commonly abbreviated as SiC. This material provides
the probe with a structure suitable for immersion into molten aluminum
during hydrogen measurement. The probe is intended for repeated
immersion applications within the operating conditions specified by
the AlSCAN system.

Technical Specifications

AlSCAN Hydrogen Measurement Principle

The ABB AlSCAN system uses a closed recirculation loop to directly
determine hydrogen concentration in liquid aluminum. A small volume
of carrier gas, typically nitrogen, is brought into contact with the
molten metal through the immersed probe. Hydrogen contained in the
liquid aluminum transfers into the circulating gas.

The gas continues to circulate through the measurement loop until its
hydrogen content reaches equilibrium with the hydrogen partial pressure
associated with the molten metal. The analyzer then measures the
hydrogen concentration in the gas and converts the result into a
corresponding reading for the hydrogen concentration in the aluminum.

This measurement approach allows hydrogen to be evaluated directly
from the melt rather than relying only on indirect laboratory
estimation. The HME0300D is the physical probe that establishes the
required contact between the circulating measurement gas and the
liquid metal.

HME0300D Probe Construction

The probe material is one of the defining characteristics of the
HME0300D. ABB specifies recrystallized silicon carbide as the primary
probe material. Silicon carbide provides a suitable combination of
thermal and mechanical characteristics for an immersion probe used
in molten aluminum measurement applications.

The construction is designed around the operating requirements of
the AlSCAN measurement process. During measurement, the probe is
immersed into the molten aluminum so that the gas circulation system
can establish the required interaction between the carrier gas and
the melt. The probe therefore functions as an essential part of the
measurement path rather than simply serving as a mechanical support.

Application in Aluminum Foundries

Hydrogen measurement is particularly relevant in aluminum foundry
operations because dissolved hydrogen in molten metal can affect
casting quality. The concentration of hydrogen can vary according
to melting conditions, alloy composition, temperature, treatment
processes, and other production factors.

The HME0300D provides a dedicated probe option for foundry alloy
applications within the AlSCAN platform. By placing the probe
directly into the molten aluminum, the measurement system can obtain
information from the melt at the point where the process is being
evaluated.

This direct measurement capability can support process monitoring
and metallurgical decision-making in aluminum production environments.
The actual measurement procedure, immersion conditions, analyzer
configuration, and interpretation of results should follow the
applicable ABB AlSCAN documentation and the requirements of the
individual metallurgical process.

HME0300D Compared with Other AlSCAN Probes

ABB provides different AlSCAN probe models because aluminum alloy
applications can have significantly different measurement requirements.
HME0200D is intended for repetitive immersion in wrought alloys,
while HME0300D is designed for wrought and foundry alloy applications.
HME1200D is intended for repetitive immersion, continuous monitoring,
long sequences of immersion, and certain specialized alloy conditions.

The HME0300D should therefore be selected according to the alloy and
measurement application rather than simply by physical similarity
with another AlSCAN probe. ABB specifically identifies HME0300D as
unsuitable for strontium modified alloys. This distinction is
important when configuring an AlSCAN measurement system for foundry
production.

Typical Probe Operating Life

ABB specifies a typical life for the HME0300D of 10 immersions or
3 hours of continuous immersion, whichever comes first. This figure
describes the typical application life identified by ABB and should
not be interpreted as a universal operating limit independent of
process conditions.

Actual probe behavior can depend on immersion conditions, alloy
composition, operating temperature, measurement frequency, and the
characteristics of the individual foundry process. For this reason,
the HME0300D should be operated according to the applicable AlSCAN
instructions and the process conditions for which the probe is
specified.

Role in the AlSCAN System

The HME0300D works together with the AlSCAN hydrogen analyzer rather
than operating as an independent hydrogen measuring instrument. The
analyzer contains the gas circulation and measurement components,
while the probe provides the physical interface with the molten
aluminum.

ABB describes the AlSCAN analyzer as using a thermal conductivity
sensor to determine the hydrogen concentration in the gas loop. A
built-in microprocessor controls the instrument and processes the
measurement data. The HME0300D therefore forms part of a complete
measurement architecture in which probe, gas loop, sensor, and
analyzer electronics work together.

Product Identification

When identifying the ABB HME0300D, the model designation should be
retained exactly as specified: HME0300D. The model identifies the
particular AlSCAN probe configuration and distinguishes it from
HME0200D and HME1200D.

For technical documentation and component identification, the product
can be described as an ABB AlSCAN hydrogen measurement probe for
wrought and foundry aluminum alloys, manufactured from recrystallized
silicon carbide. This terminology reflects the product information
published by ABB and clearly separates the probe from the AlSCAN
analyzer itself.

Industrial Measurement Applications

The HME0300D is relevant to aluminum foundry environments where
hydrogen concentration needs to be evaluated directly in molten
metal. Applications may include aluminum casting operations and
other metallurgical processes involving suitable wrought or foundry
alloys.

In these environments, the probe provides the measurement interface
required by the AlSCAN system. Its immersion-based design allows
hydrogen in the melt to participate in the closed-loop gas measurement
process, providing the analyzer with the information required to
calculate the corresponding hydrogen concentration.

Conclusion

ABB HME0300D is an AlSCAN hydrogen measurement probe designed for
direct hydrogen measurement in liquid aluminum. ABB identifies this
probe for wrought and foundry alloy applications and specifies
recrystallized silicon carbide as its probe material. The HME0300D
operates as part of the ABB AlSCAN closed-loop measurement system,
where carrier gas interacts with molten aluminum and the resulting
hydrogen concentration is measured by the analyzer.

The HME0300D is distinguished from other AlSCAN probe models by its
intended application and construction. ABB specifies it for wrought
and foundry alloys, while excluding strontium modified alloy
applications. Its typical life is 10 immersions or 3 hours of
continuous immersion, whichever comes first. These characteristics
make the ABB HME0300D a dedicated probe solution for hydrogen
measurement in suitable aluminum metallurgical processes.