HTG3535CH Measurement Specialties Inc/MEAS France, HTG3535CH Datasheet - Page 4

• Manufacturer Part Number: HTG3535CH
• Description: VOUT RH/ TEMP MODULE, SIDE CONN
• Manufacturer: Measurement Specialties Inc/MEAS France

Specifications of HTG3535CH

• Output Type: Analog Voltage, NTC Thermistor
• Sensor Type: Humidity and Temperature
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

HTG3500 Series - Relative Humidity and Temperature Module
•
HTG3500 series modules are specified for maximum accuracy measurements within 10 to 95 %RH.
Excursion out of this range (< 10% or > 95% RH, including condensation) does not affect the reliability of
HTG3500 series characteristics.
TEMPERATURE SENSOR
•
Depending on the needed temperature measurement range and associated accuracy, we suggest two methods
to access to the NTC resistance values.
as the material parameter β in reality also depend on temperature. So this approach is suitable for describing a
restricted range around the rated temperature or resistance with sufficient accuracy.
complicated approaches (e.g. the Steinhart-Hart equation) are used or the resistance/temperature relation as
given in tabulation form. The below table has been experimentally determined with utmost accuracy for
temperature increments of 1 degree.
Actual values may also be influenced by inherent self-heating properties of NTCs. Please refer to MEAS-France
Application Note HPC106 “Low power NTC measurement”.
HTG3500 Series HPC123_G
The exponential relation only roughly describes the actual characteristic of an NTC thermistor can, however,
For practical applications, a more precise description of the real R/T curve may be required. Either more
Humidity error budget conditions at 23°C
Typical temperature output
0
0
10
R
R
T, T
β
e
T
N
N
20
NTC resistance in Ω at temperature T in K
Temperature in K
Beta value, material specific constant of NTC
NTC resistance in Ω at rated temperature T in K
Base of natural logarithm (e=2.71828)
30
R
T
www.meas-spec.com
=
40
R
N
4/10
×
50
e
β
⎛
⎜ ⎜
⎝
T
1
−
60
T
1
N
⎞
⎟ ⎟
⎠
70
80
90
100
January 2010