NTC THERMISTORS:
TYPE GT
GENERAL PURPOSE SENSOR
DESCRIPTION:
Type GT thermistors consist of a G type thermistor
mounted in a semi-flexible epoxy resin and
housed within a nickel-plated brass case.
Connection is made with 7/0.2mm silver-plated
copper conductors insulated with PTFE.
Primary applications are temperature
measurement and control.
DATA:
Resistance tolerance at 25°C
.................±20%
B value tolerance
......................................±5%
Maximum temperature
............................125°C
P max at 25°C......................................270
mW
Dissipation constant
...........................2.7mW/K
Thermal time constant
.............2.8s self heating
τ..............................2.8
minutes external heating
Isolation voltage, case to leads
...............400V
DIMENSIONS:
300mm
1.8”
NOM
6.40±0.13mm
0.250±0.005”
19.1mm
0.75”
NOM
Code
R20
Ω
R25
Ω
Rmin
Ω
B 25-85
K
(
)
GT22
GT52
GT13
GT23
GT53
GT14
GT24
GT54
GT15
GT25
GT55
GT16
GT26
200
500
1000
2000
5000
10000
20000
50000
100000
200000
500000
1000000
2000000
172
425
845
1650
4150
8200
16200
40000
79000
155000
R
100
15000
30000
60000
13
40
70
113
250
430
720
1500
2600
4400
6500
11000
20000
2750
2900
3000
3125
3400
3600
3800
4075
4275
4400
B
(100-200°C)
4700
4850
5000
BOWTHORPE THERMOMETRICS
Crown Industrial Estate, Priorswood Road
Taunton, Somerset TA2 8QY UK
Tel +44 (0) 1823 335200
Fax +44 (0) 1823 332637
THERMOMETRICS, INC.
808 US Highway 1
Edison, New Jersey 08817-4695 USA
Tel +1 (732) 287 2870
Fax +1 (732) 287 8847
KEYSTONE THERMOMETRICS CORPORATION
967 Windfall Road
St Marys, Pennsylvania 15857-3397 USA
Tel +1 (814) 834 9140
Fax +1 (814) 781 7969
NTC THERMISTORS:
TYPE GT
GENERAL PURPOSE SENSOR
For temperature measurement the electrical power
dissipation within the thermistor should be limited
so that the element temperature is raised by less
than half the measurement resolution required.
This prevents the thermistor from becoming over-
sensitive to the thermal conductivity of its immedi-
ate surroundings. If the thermistor is permanently
situated in a stable environment more power may
be dissipated.
BOWTHORPE THERMOMETRICS
Crown Industrial Estate, Priorswood Road
Taunton, Somerset TA2 8QY UK
Tel +44 (0) 1823 335200
Fax +44 (0) 1823 332637
THERMOMETRICS, INC.
808 US Highway 1
Edison, New Jersey 08817-4695 USA
Tel +1 (732) 287 2870
Fax +1 (732) 287 8847
KEYSTONE THERMOMETRICS CORPORATION
967 Windfall Road
St Marys, Pennsylvania 15857-3397 USA
Tel +1 (814) 834 9140
Fax +1 (814) 781 7969
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