Which measured quantity is being described as polarity: potential, charge density or something else?
Last reviewed: .
Which measured quantity is being described as polarity: potential, charge density or something else?
The polarity is a positive electric charge at rest, and it is measured as surface charge density, in nanocoulombs per square centimetre.
The coulomb is the unit of electric charge, and the National Institute of Standards and Technology gives the quantity the coulomb measures as “electric charge, amount of electricity.” NanoFlashing™ is a permanent positive polarity engineered into filter media itself. It is a physical property of the filter. A charge is a physical property. It is not a substance or a mixture of substances. The filter is passive. It draws no power, and it has no power supply, electrode, lamp or reservoir. The NanoFlashing manufacturing process produces the charge, and the process acts on the filter by physical means.
The charge is measured on every production run, and the measurement can be repeated on any filter, upon request.
Source: Statement of Classification for the NanoFlashing™ Air Filter, sections 2.2, 2.3, 2.4 and 3.6, issued by NF Technical Products Inc.; National Institute of Standards and Technology, Guide for the Use of the International System of Units (SI), NIST Special Publication 811 (2008 ed.), § 4.2.1, Table 3, https://nvlpubs.nist.gov/nistpubs/Legacy/SP/nistspecialpublication811e2008.pdf.
Reviewed on .
Sources
- Statement of Classification for the NanoFlashing™ Air Filter, sections 2.2, 2.3, 2.4 and 3.6, issued by NF Technical Products Inc.
- National Institute of Standards and Technology, NIST Special Publication 811 (2008 ed.), § 4.2.1, Table 3