1996 Nov 12 1
Philips Components Product specification
Humidity sensor 2322 691 90001
APPLICATIONS
•Humidity measurements in
electronic hygrometers for
domestic use
•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
Humidity range (RH) 10 to 90 %
Capacitance at +25 °C; 43% RH; 100 kHz 122 ±15% pF
Sensitivity between 12 and 75% RH 0.4 ±0.05 pF/%RH
Frequency 1 to 1000 kHz
Maximum AC or DC voltage 15 V
Storage humidity range (RH) 0 to 100 %
Ambient temperature range:
operating 0 to +85 °C
storage −25 to +85 °C
Drop test:
height of free fall 1 m
Mass ≈1.3 g
1996 Nov 12 2
Philips Components Product specification
Humidity sensor 2322 691 90001
MECHANICAL DATA
Marking
PHILIPS H1.
Mounting
The device can be soldered directly
on to a printed-circuit board or
fastened with 3 mm bolts.
Soldering
Solderability: ≤240 °C; ≤4s.
Resistance to heat: ≤240 °C; ≤4s.
Robustness of terminations
Tensile strength: 10 N.
Fig.1 Component outline.
Dimensions in mm.
MBD125
5.0 0.5
3.1 0.1
11.5
0.5
17.0
0.5
5.08
1.15 max
3
23.0
0.5
15.5 0.5
1996 Nov 12 3
Philips Components Product specification
Humidity sensor 2322 691 90001
ELECTRICAL CHARACTERISTICS
Unless otherwise stated, measurements are in accordance with
“IEC publication 539”
. Stability is in accordance with
“CECC 43000”
and
“IEC 68-2”
.
PARAMETER VALUE UNIT
Humidity range (RH) 10 to 90 %
Capacitance at +25 °C; 43% RH; 100 kHz 122 ±15% pF
Tan δ at +25 °C; 100 kHz; 43% RH ≤0.035
Sensitivity between 12 and 75% RH 0.4 ±0.05 pF/%RH
Frequency range 1 to 1000 kHz
Temperature dependence 0.1 %RH/K
Response time in minutes
(to 90% of indicated RH change at +25 °C, in circulating air):
between 10 and 43% RH <3
between 43 and 90% RH <5
Hysteresis (for RH excursion of 10 to 90 to 10%) ≈3%
Maximum AC or DC voltage 15 V
Storage humidity range (RH) 0 to 100 %
Ambient temperature range:
operating 0 to +85 °C
storage −25 to +85 °C
Mass ≈1.3 g
Fig.2 Typical capacitance as a function of relative humidity.
0 100
150
110
MEA832
120
130
140
50
C
(pF)
RH (%)
