鈥?/div>
Self-regulating air humidifiers, etc.
DESCRIPTION
This capacitive atmospheric humidity sensor consists of a
non-conductive foil, which is covered on both sides with a
layer of gold. The dielectric constant of the foil changes as a
function of the relative humidity of the ambient atmosphere
and, accordingly, the capacitance value of the sensor is a
measure for relative humidity. The foil is clamped between
contact springs and assembled in a plastic housing. It is
provided with two connecting pins which fit printed-circuit
boards with a grid pitch of 2.54 mm, provision is also made
for fastening with 3 mm bolts. The characteristics are not
affected by incidental water condensation on the sensor foil.
It should not be exposed to either acetone or chlorine
vapours.
QUICK REFERENCE DATA
PARAMETER
VALUE
UNIT
%
PF
PF/%R
kHz
%RH/K
Humidity range (RH)
10 to 90
Capacitance at +25
擄
C; 43% RH; 100 kHz 122
鹵
15%
Tan
未
at +25
擄
C; 100 kHz; 43% RH
鈮?/div>
0.035
Sensitivity between 12 and 75% RH
0.4
鹵
0.05
Frequency
1 to 1000
Temperature dependence
0.1
Response time in minutes
(to 90% of indicated RH change at
+25
擄
C, in circulating air):
between 10 and 43% RH
<
3
between 43 and 90% RH
<
5
Hysteresis (for RH excursion of
鈮?/div>
3
10 to 90 to 10%)
Maximum AC or DC voltage
15
Storage humidity range (RH)
0 to 100
Ambient temperature range:
operating
0 to +85
鈭?/div>
25 to +8
storage
Drop test:
height of free fall
1
Mass
鈮?/div>
1.3
Note
Unless otherwise stated, measurements are in accordance with
鈥淚EC publication 60539鈥?/div>
.
Stability is in accordance with
鈥淐ECC 43000鈥?/div>
and
鈥淚EC 60068-2鈥?/div>
.
MOUNTING
%
V
%
擄
C
擄
C
M
G
The device can be soldered directly on to a printed-circuit
board or fastened with 3 mm bolts.
SOLDERING
Solderability:
鈮?/div>
240
擄
C;
鈮?/div>
4 s.
Resistance to heat:
鈮?/div>
240
擄
C;
鈮?/div>
4 s.
ROBUSTNESS OF TERMINATIONS
Tensile strength: 10 N.
ELECTRICAL CHARACTERISTICS
150
C
(pF)
140
MEA832
DIMENSIONS
in millimeters
15.5
0.5
23.0
0.5
130
3
1.15 max
5.08
120
3.1
0.1
110
0
50
RH (%)
100
17.0 11.5
0.5
0.5
Typical capacitance as a function of relative humidity.
5.0
0.5
MBD125
Component outline.
For technical questions contact: nlr.europe@vishay.com
Document Number: 29001
Revision: 10-Oct-03
www.vishay.com
66
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