Datasheet

Humidity sensor
Version : 0.1
File: SMTHSver
DRAFT VERSION
- 3 -
SMARTEC BV, Delpratsingel 26 WWW.SMARTEC.NL
4811 AP BREDA, The Netherlands Tel: [phone]
CALIBRATION.
Due to the high linearity of the humidity sensor it is only needed to calibrate on one point.
In one of the Smartec’s application notes (on www.smartec.nl, support shop) salt solutions
for calibration can be found. A poor mans solutions is to place the humidity sensor into a
refrigerator. Inside a refrigerator the humidity is always 100%.
The factory tests are done at 55% relative humidity. Depending on the application of the
humidity sensor calibration can be done at higher humidity level as well on lower humidity
level. The long term stability (0.2 %/yr) guarantees a stable working for over the years.
TOLERANCE.
The specified tolerance is the tolerance of the capacitor at 60% RH. This tolerance can be
considered as an effect of the production technology. When the capacitor is f.i. 2 % to high
(@ 0% RH) also the sensitivity will be around 2% to high.
LINEARITY.
The linearity is considered as the maximum deviation from a straight line between 0% RH
and 100% RH. In the condensing area some drift can be expected; but this drift is reversible.
The device is resistant against submerge in water.
MECHANICAL OUTLINE.
ORDERING CODE:
SMTHS07
5
2.54
7
5
0.5 x 0.3
11
-
all sizes in mm.
- do not touch active area or use glove
- base material: glass (0.3 mm)
- wires