DH603 Hot Extraction

Residual and Diffusible Hydrogen Determination by Hot Extraction

Our DH603 employs residual, diffusible, and total hydrogen measurements to deliver your hydrogen determinations in ferrous alloys rapidly and precisely. The improved DH603 design features a small size, user-friendly operation software, increased instrument safety, and dependability to truly streamline your hydrogen determination.

Features

LECO’s ECLIPSE architecture is a one-of-a-kind design that improves dependability and serviceability.
For quick and straightforward hydrogen determination of molten metals, a range of evacuated pin tubes and diffusible samplers are available.
Improved plumbing allows for easier flow channel maintenance.
Components are easily accessible to the operator thanks to ergonomic casings.
Temperature ramping from ambient to 1100°C is possible with the state-of-the-art furnace control system.
Optional diffusible sampler piercer—diffusible, residual/total hydrogen measurement is available.
Gas dosage calibration eliminates the need for reference materials.

Theory of Operation

The DH603 is a single instrument that detects the amount of residual (total) hydrogen in iron and ferrous alloys, or diffusible and residual hydrogen with the optional piercer. The determinator has an intuitive operation system as well as improved furnace control.

The determination of residual (total) hydrogen entails introducing a pre-weighed sample into the furnace and allowing the hydrogen to be evolved into the flowing gas stream by hot extraction. A LECO vacuum pin tube or a similar approach can be used to collect samples. A thermal conductivity detector is used to determine the hydrogen content. Parts per million are used to represent the final results.

Placing a sampler in the optional piercing unit, which punctures the sampler and allows dispersed molecular hydrogen to be purged into the carrier gas stream, is required for diffusible and residual hydrogen measurement. A thermal conductivity detector is used to measure the hydrogen. The sampler is then withdrawn from the piercing device, together with the outer shroud, revealing a pin sample for residual hydrogen analysis. After that, the sample is weighed and placed in the resistance furnace, where the leftover hydrogen is extracted and introduced into the carrier gas stream. A thermal conductivity detector is used to determine the hydrogen content. Parts per million are used to represent the final results.