Description
Reference powder, test medium DIN EN ISO 4490 / ASTM B213-20, Chinese emery grain, is a norm-compliant calibration medium supplied as a 60 g portion for Hall Flowmeter verification. The material is identical and traceable to the Chinese emery grain (emery powder) cited in the referenced standards and is used to check and adjust the flow time through the calibrated outlet opening of a Hall funnel. Normative references include ASTM B213-20 (section 6.6) and DIN EN ISO 4490 (section 5.5). In production, this test medium is applied to calibrate and adjust the flow velocity of the outlet orifice; depending on the duty cycle, regular verification of flow time by the end user is recommended. The powder supports quality assurance of free-flowing metal-powder measurements in laboratory and industrial powder-metallurgy environments, including additive manufacturing workflows that rely on Hall Flowmeter data. Provided by manufacturer Landgraf HLL, the reference emery grain complements Hall Flowmeter apparatus and related timing or calibration accessories. It enables reproducible comparison against the standard reference grain without altering the defined test procedure. Suitable for routine orifice checks, method validation and ongoing monitoring of funnel performance under the stated ASTM and DIN EN ISO clauses.
This article is part of Cell culture media & sera, in Cell culture.
Key features
- Pack size: 60 g
- Type: Chinese emery grain (emery powder)
- Role: Norm-compliant reference / test medium
- Standard: DIN EN ISO 4490 (5.5)
- Traceability: Identical to standard reference emery grain
- Technical Information Sheet:
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Questions about Reference powder, test equipment DIN-EN-ISO-4490/ASTM B213-20Chinese emery grain
What is this article?
Reference powder, test equipment DIN-EN-ISO-4490/ASTM B213-20Chinese emery grain is the article on this page. Luminix Health distributes Landgraf HLL for laboratory use. It sits in Cell culture media & sera, inside Cell culture, in Milieux microbiologiques.
Cell-culture medium is the liquid a cell line grows in. Serum, often fetal bovine, supplies what the basal medium does not. With or without glutamine, with or without phenol red, and the serum origin are different products. Serum is a cold-chain article and is never part of free standard delivery.
Cell culture grows cells outside the body. The medium, often with serum, supplies what the flask does not. A flask or a dish is the vessel, treated so the cells attach or left untreated so they float. Contamination by microbes, or by another cell line, is the ordinary failure. Cold-chain articles in this work, including serum, are never part of free standard delivery. Lines are catalogued by ATCC. Papers are on PubMed. Practice is summarised by the WHO laboratory biosafety topic.
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