Re: [core] Proposed new SenML Units

[Jaime Jiménez <[e-mail]>]

Hi Carsten,

The updated version of the tables in the original email would be the ones below, please
have a look and verify I did not intriduce new errors:


On the SenML Units registry:

+===========+================================+=======+                       
| Symbol    | Description                    | Type  |
+===========+================================+=======+                                                                | NTU       | Nephelometric Turbidity Unit   | Float |                      
+-----------+--------------------------------+-------+

On the Secondary Units registry:

+=========+======================+======+==========+======+
|Secondary| Description          |SenML |   Scale  |Offset|
| Unit    |                      | Unit |          |      |
+=========+======================+======+==========+======+
| ppb     | parts per billion    | /    |   1e-9   |    0 |
+---------+----------------------+------+----------+------+
| ppt     | parts per trillion   | /    |   1e-12  |    0 |
+---------+----------------------+------+----------+------+
| VAh     | volt-ampere hour     | VAs  |    3600  |    0 |
+---------+----------------------+------+----------+------+
| mg/l    | milligrams per liter | kg/m3|   1/1000 |    0 |
+---------+----------------------+------+----------+------+
| ug/l    | microgram per liter  | kg/m3|   1e-6   |    0 |  
+---------+----------------------+------+----------+------+
| g/l     |  grams per liter     | kg/m3|     1    |    0 |
+---------+----------------------+------+----------+------+   


Ciao!
-- Jaime



On 16.11.2020 17:38, Carsten Bormann wrote:
>
>
>> On 2020-11-16, at 10:22, Jaime Jiménez <[e-mail]> 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
>