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| Air-conditioner¡¢refrigerator¡¢Electric
water heater¡¢Electric Water fountain¡¢Soya-bean milk
machine¡¢mobile battery¡¢electronic calendar¡¢microwave
oven¡¢electromagnetic oven¡¢Auto temperature detector¡¢barn
temperature detector¡¢medical apparatus¡¢fire alarm,etc. |
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| Manufactured from the oxide
of the transition metals ¨CMn. ,Cu., and
Ni . NTC Thermistor are temperature dependant
semiconductor resistor . After the processing
of sedimentation and Isotactic moulding
,the raw material is baked with high temperature
upto 1400¡æ ,then the thermistor is formed
combined with our advanced semiconductor
processing technics |
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| The basic physical Characteristics
are The resistance value, B value, Thermal
dissipation coefficient, Time constant. |
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Resistance
R£¨k¦¸£©£º
The resistance value can be calculated
approximately with the following formula£º
Note£º R1,R2 is the resistance at temperature
T1,T2£¨k¦¸£©
B£ºB Valne£¨K£©
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B
Valne B
£¨K£©£º
B value shows the change
of resistance between two temperatures and
can be calculated with the following formula:
Note£º R1,R2 is the resistance at
temperature T1,T2
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Thermal
dissipation coefficient ¦Ä£¨mW/¡æ£©£º
Thermal dissipation coefficient is
the ratio of power consumed to change of
surrounding temperature£º
Note£º W Power consumed by the thermistor£¨mW£©
T
Temperature
To
Surrounding temperature
I
The power goes through
the thermistor under temperature T
R
The resistance under temperature
T
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Time
constant ¦Ó(sec.)£º
The time required
for a thermistor to change its body temperature
by 63.2% of a specific temperature span
when the measurements are made under zero-power
conditions in thermally stable environments.
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