Datasheet

DATA SHEET
Technical changes reserved
0141 0316-303 09/2014
Humidity-Reference cells
REFZ
Salt tables (summary)*
Salt Lithium chloride LiCl Potassium acetate
C
2
H
3
KO
2
Temp. [°C] Humidity value [% RH] Humidity value [% RH]
20 11,31 23,11
23** 11,31 22,75
25 11,30 22,51
30 11,28 21,61
35 11,25 ---
40 11,21 ---
Salt Magnesiumchloride
MgCl
2
Potassiumcarbonate
K
2
CO
3
Temp. [°C] Humidity value [% RH] Humidity value [% RH]
20 33,02 43,16
23** 32,88 43,16
25 32,78 43,16
30 32,44 43,17
35 32,05 ---
40 31,60 ---
Salt Magnesium nitrate
Mg(NO
3
)
2
Sodium chloride NaCl
Temp. [°C] Humidity value [% RH] Humidity value [% RH]
20 54,38 75,47
23** 53,49 75,36
25 52,89 75,29
30 51,40 75,09
35 49,91 74,87
40 48,42 74,68
Salt Potassium chloride KCL Potassium nitrate KNO
3
Temp. [°C] Humidity value [% RH] Humidity value [% RH]
20 85,11 94,62
23** 84,65 94,00
25 84,34 93,58
30 83,62 92,31
35 82,95 90,79
40 82,32 89,03
Salt Potassium sulphate
K
2
SO
4
Temp. [°C] Humidity value [% RH]
20 97,59
23** 97,41
25 97,30
30 97,00
35 96,71
40 96,41
* Reference: Greenspan, NIST – USA
** Note: The value for 23 °C can be linearly interpolated from value of
20 °C and 25 °C.
Useful Life
With proper usage, the reference cells can be used for over many
years. If there is change in liquid level, the cells can be returned to
our customer service department for regeneration or re-lling.
For each service order, you can get a test report with record of accu-
racy. Further information on handling is enclosed with the cells.
Packaging
The cells are available in two physical shapes (G1/2“ thread or M20
x 1,5 mm thread) with nine different salt llings each. The salts used
are of most pure laboratory grade.
Besides the standard models, unlled membrane containers as well
as special designs are also available. For further information, please
contact us !
B+B Thermo-Technik GmbH | Heinrich-Hertz-Straße 4 | D-78166 Donaueschingen
Fon [phone] | Fax [phone] | [e-mail] | bb-sensors.com
2 / 3