NTC THERMISTORS:
TYPE G GL
GLASS ENCAPSULATED BEAD
DESCRIPTION:
Type G thermistors incorporate a directly heated
bead of semiconductor material in a solid glass
pellet, connection being by means of two cunife
wires. These wires are normally tinned but ther-
mistors G55, G26 and G16 which are intended
to operate at temperatures up to 300°C have
untinned cunife wires suitable for welding
or brazing.
The type G thermistor is available in three styles
of glass pellet, the largest size is referred to as
‘Standard’ (G-C), the smaller size as ‘Miniature’
(G-D) and the Probe as GL - eg a miniature G13
is coded G13D.
These thermistors are suitable for general use in
the field of temperature measurement, control or
compensation, flow measurement and similar
applications.
DIMENSIONS:
DATA:
B value tolerance
......................................±5%
Thermal Time Constant
G - C
........................................................21s
G - D........................................................19s
Dissipation Constant
G - C
................................................1.3mW/K
G - D................................................1.1mW/K
GL -..................................................1.2mW/K
LOW RESISTANCE TYPES:
TA max
.....................................................125°C
TB max
.....................................................125°C
Pmax at 20°C G - C..............................140mW
G - C..............................120mW
GL..................................130mW
Derate linearly to zero at 125°C
MEDIUM RESISTANCE TYPES:
TA max
.....................................................155°C
TB max
.....................................................200°C
Pmax at 20°C G - C
...............................230mW
G - D...............................200mW
GL...................................220mW
G - C
Derate linearly to 55mW at 155°C
G - D
Derate linearly to 50mW at 155°C
GL -
Derate linearly to 53mW at 155°C
HIGH RESISTANCE TYPES:
T A max
....................................................300°C
T B max
...................................................300°C
P max at 20°C G - C..............................360mW
G - D
...............................310mW
GL -
.................................340mW
Derate linearly to zero at 300°C.
Code
G-C
G-D
GL-
Lead
Dia. mm
0.40
0.35
0.35
Body
Dia. (max)
3.2
2.5
2.5
Average
Weight
0.15
0.11
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 G GL
GLASS ENCAPSULATED BEAD
R20
Ω
R25
Ω
Emax in free air at
20°C
GC only (V)
Rmin
Ω
B25-85
K
Code
Low resistance types
G22 C, D and L
G52
G13
G23
G53
Medium resistance types
G14
G24
G54
G15
G25
High resistance types
G55
G16
G26
200
500
1k
2k
5k
10k
20k
50k
100k
200k
172
425
840
1.65k
4.15k
8.2k
16.2k
40k
79k
156k
R100
15k
30k
60k
1.9
2.9
3.9
5.3
8.2
11
16
24
34
46
19
40
70
113
250
110
160
320
520
810
2750
2900
3000
3125
3400
3600
3800
4075
4275
4400
B100-200
4700
4850
5000
500k
1M
2M
62
87
120
180
330
560
Example
Description
Standard Values
G = pellet
GL = probe
see above table
C = standard
D = miniature
(not applicable
to GL)
W = ±20%
Y = ±10%
Z = ±5%
G
sensor style
54
resistance code
C
body size
CODING:
Resistance/tolerance and physical style are
specified by the product code.
e.g. G54CY
Y
resistance
or response
temperature
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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