CWF系列风华NTC热敏电阻温度传感器规格书

APPLICATIONS
Temperature test in all kinds of air-condition,refrigerator,water boiler,microwave oven.
PART NUMBERING
FEATURES
High precision and high stability Quick temperature response Resistant to heat shock Moisture resistant
Excellent quality and high stability
Guang Dong Fenghua Advanced Technology (Holding)Co.,LTD.code
NTC
NTC temperature sensors code
25
Rated zero-power resistance R unit:
The first two are significant figure of resistance and the third one expresses number of following zeros
25
FH -CWF
XXX
X XXXX
X
X /XXXX
X
%
Tolerance of R %
25
B B value Code
B
%Tolerance of B value %
B
B value Temperature Code
Length of the sensor unit:mm
Termination shape code
NTC
NTC THERMISTOR TEMPERATURE SENSORS
APPEARACE AND DIMENSIONS
C
Pour type
type C
SHELL PARAMETER
E EPOXY TYPE TYPE E
NOTE We can absolutely design NTC Sensors as your requirement.
shell
PVC
R 10
10
Rated zero-power resistance
R 10
10
0.5%
1%
2%3%5%Resistance tolerance 0.5%
1%2%3%
5%.
B 25/50
25/85
2500
5000K
B Constant 25/50
or 25/852*******K.
B
0.5%
1%
2%3%
5%.Tolerance of B-constant
0.5%
1%
2%
3%
5%.
40
100
Operating temperature
40100C
2.0
4.0mw/
E
3.0
4.5mw/.Dissipation factor (in still air)
type C 2.0 4.0mw/
type E
3.0
4.5mw/.
C
30s E 20s.
Thermal time constant (in still air)
type C
30s type E 20s.
R T
R T characteristics
25
25
2
6
2
6
PERFORMANCE PARAMETER
NTC
NTC THERMISTOR TEMPERATURE SENSORS
R T characteristics
NOTE We can absolutely design NTC sensors as your requirement.
1.
R 25
1.Rated zero-power resistance (R )
The zero-power resistance at 25(298.15K).2.B
B=ln(R /R )/(1/T1-1/T2)
R T1
R
T2
25
25T1T2T1
T2
THE MAIN CHARACTERISTICS
2.B value
B value is expressed by the following equation:B=ln(R /R )/(1/T1-1/T2)R Resistance at T1(K).R Resistance at T2(K).
3
63.2%
C
=C/
3.Thermal time constant
The time necessary for a thermistor to vary its temperature by 63.2%of the total difference its initial temperature and its final temperature when it is subjected to a temperature step under zero-power conditions.
4
=P/T
4.Dissipation factor
The quotient of the change in power dissipation in a thermistor and the Resultant temperature change of the element.
T1T2T1T25.
=1/R dR /dT =-B/T
T R T
T K
B
B
(K)
5.Temperature coefficient at zero-power of the resistance At a specific temperature T
is a ratio of the zero-power resistance change with temperature
and the zero-power resistance.
=1/R dR /dT =-B/T T
T
T T T
T T
T
T
T T 2
2
NTC
NTC THERMISTOR TEMPERATURE SENSORS
RELIABILITY CHARACTERISTICS
FH-CWF502F3470FA/
B(25/50)3470K1%R255K1%NTC
NTC THERMISTOR TEMPERATURE SENSORS
ATTENTIONS OF ORDER
Please comment the next if you want to make some order:
1APPLICATION
Such as temperature survey,control,compensating and so on.
2SERVICE ENVIROMENT
Such as atmosphere,water,moisture and so on.
3THE WORKING RANGE OF TEMPERATURE
()()
4ITEM NAME FORM AND SIZE
5THE RESISTANCE VALUE
K%at()
6B THE VALUE OF B
B(/)=()K%
7THERMAL TIME CONSTANT
()()
()S()S()enviroment
8DISSIPATON FACTOR
mW/
9OTHER SPECIAL TECHNICAL CONDITIONS
Attentions:If the service request you want is out of the list parameter,please contact with us,and we will design and manufact as your requirement.。