CHS-XS Datasheet, PDF (1/2 Pages) TDK Electronics – Humidity Sensors CHS Series CHS-XS Type

(1/2)
Humidity Sensors
CHS Series CHS-XS Type
Conformity to RoHS Directive
Based on TDK’s unique manufacturing technology for polymeric
materials and precision fabrication technology, these variable
resistance humidity sensing elements are made by combining spe-
cially selected, high quality materials to deliver excellent resistance
against water and various gases.
This consists of a humidity sensing material, a conductive polymer
film, applied on an electrode board and provides a wide range of
impedance variation in response to changes in humidity.
FEATURES
• Small and responsive.
• Minimal variation for excellent detection accuracy.
• Highly resistant to water and gases.
• As assembled products, they support a wide range of applica-
tions that make full use of their features
SHAPES AND DIMENSIONS
7.5±0.5
4±0.5
APPLICATIONS
Air conditioners, humidifiers, dehumidifiers, dryers, refrigerators,
PPC, LBP, etc.
(0.5)
2.54
(0.25)
Dimensions in mm
SPECIFICATIONS
Rated voltage Eac
Rated power
Temperature
Operating
ranges
Storage
Operating
Humidity ranges
Storage
Impedance characteristics
Nominal accuracy
Hysteresis
Response time
5V max.
0.5mW max.
0 to 60°C
–20 to +85°C
10 to 90(%)RH
5 to 95(%)RH
33kΩ[25°C, 50(%)RH]
±5(%)RH[21 to 54 kΩ]
1(%)RH typ.
1min typ.
REMINDERS FOR USING THESE PRODUCTS
• These products were designed to be used only with AC. Never
use DC because doing so can result in severe damage to the
product, including the electrolysis and peeling of the humidity
sensing material.
• Please note that even when AC is used, the product will sustain
the same type of damage as when DC is used if residual DC
components or asymmetrical waveforms are present.
• The operational lifetime of these products can be shortened dra-
matically depending on the operating conditions and storage
conditions.
If you intend to use these products in any of the types of
environment listed below, please confirm and estimate their
operating lifetimes ahead of time:
(1) Environments in which they are exposed to corrosive gases
and/or large amounts of dust.
(2) Environments in which they are exposed to high levels of
temperature and humidity and/or sudden temperature
changes.
(3) Environments in which they are exposed to extreme
condensation and/or direct exposure to water or salt water.
• Please implement measures to prevent gases from entering the
sensor, such as jigs for sealing off the sensors, during processes
in which gases are produced from decomposing flux, for exam-
ple, during solder flow.
• Conformity to RoHS Directive: This means that, in conformity with EU Directive 2002/95/EC, lead, cadmium, mercury, hexavalent chromium, and specific
bromine-based flame retardants, PBB and PBDE, have not been used, except for exempted applications.
• All specifications are subject to change without notice.
001-03 / 20070222 / eb111_chs_xs.fm