Difference between revisions of "Salinity sensors"

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==Introduction==
 
==Introduction==
Salinity Definition
+
===Salinity Definition===
 
+
Salinity is the total amount of dissolved salts,in grams, in one kilogram of water. Thus, salinity is a dimensionless measure without units
 
 
 
==Sensors==
 
==Sensors==
 
+
Salinity is a ratio and not a physical parameter that can be measured. Thus, “Salinity sensors” do not exist. There are several different ways to calculate this ratio with pros and cons for each method.
  
 
'''Salinity Scales'''
 
'''Salinity Scales'''
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===Conductivity meter===
 
===Conductivity meter===
  
{| class="wikitable" style="float: right; margin: 0 0 1em 1em;"
+
 
|+'''Total Molar Composition of Seawater (Salinity = 35)<ref>{{cite journal
 
|author=DOE
 
|year=1994
 
|url=http://cdiac.esd.ornl.gov/ftp/cdiac74/chapter5.pdf
 
|title=Handbook of methods for the analysis of the various parameters of the carbon dioxide system in sea water
 
|publisher= ORNL/CDIAC-74
 
|version=2
 
|editors=A.G. Dickson & C. Goyet
 
|chapter=5
 
}}</ref>
 
|-
 
! Component !! Concentration (mol/kg)
 
|-
 
| '''[[Water (molecule)|{{chem|H|2|O}}]]''' || 53.6
 
|-
 
| '''[[Chloride|{{chem|Cl|-}}]]''' || 0.546
 
|-
 
| '''[[Sodium|{{chem|Na|+}}]]''' || 0.469
 
|-
 
| '''[[Magnesium|{{chem|Mg|2+}}]]''' || 0.0528
 
|-
 
| '''[[sulfate|{{chem|SO|2-|4}}]]''' || 0.0282
 
|-
 
| '''[[Calcium|{{chem|Ca|2+}}]]''' || 0.0103
 
|-
 
| '''[[Potassium|{{chem|K|+}}]]''' || 0.0102
 
|-
 
| '''[[Total inorganic carbon|C<sub>T</sub>]]''' || 0.00206
 
|-
 
| '''[[Bromide|{{chem|Br|-}}]]''' || 0.000844
 
|-
 
| '''[[Total boron|B<sub>T</sub>]]''' || 0.000416
 
|-
 
| '''[[Strontium|{{chem|Sr|2+}}]]''' || 0.000091
 
|-
 
| '''[[Fluoride|{{chem|F|-}}]]''' || 0.000068
 
|}
 
  
  

Revision as of 16:34, 12 July 2012

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See also: Instruments and sensors to measure environmental parameters

Introduction

Salinity Definition

Salinity is the total amount of dissolved salts,in grams, in one kilogram of water. Thus, salinity is a dimensionless measure without units

Sensors

Salinity is a ratio and not a physical parameter that can be measured. Thus, “Salinity sensors” do not exist. There are several different ways to calculate this ratio with pros and cons for each method.

Salinity Scales


Refractometer

Conductivity meter

Calibration

Literature

... ...


External Links

... ...