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Re: [core] Proposed new SenML Units

Carsten Bormann <cabo@tzi.org> Mon, 16 November 2020 16:38 UTC

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From: Carsten Bormann <cabo@tzi.org>
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Date: Mon, 16 Nov 2020 17:38:09 +0100
Cc: Michael Koster <michaeljohnkoster@gmail.com>, CoRE WG <core@ietf.org>
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To: Jaime Jiménez <jaime@iki.fi>
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Subject: Re: [core] Proposed new SenML Units
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> On 2020-11-16, at 10:22, Jaime Jiménez <jaime@iki.fi> wrote:
> 
> thank you very much for your confirmation and insights on the topic. I now wonder if we should add ug/l as well as NTU. For IPSO it looks like NTU would be sufficient.

Note that we already have    
ug/m3          microgram per cubic meter kg/m3      1e-9      0      [RFC8798]

So adding ug/l would be like
ug/l          microgram per liter        kg/m3      1e-6      0

This scaled unit of mass concentration is useful beyond Turbidity; e.g. as in "the U.S. EPA set the maximum allowable concentration of lead in public drinking water at 15 µg/L” (asciified as “ug/l”).

I think we could use an updated version of the original mail so we can initiate registration from that.

Grüße, Carsten

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