NTC THERMISTORS:
TYPE P60/65/85/100
LARGE BEAD-IN-GLASS THERMOPROBES
DESCRIPTION:
The Type P60, P65, P85 and P100 THERMOPROBES
consist of a large bead thermistor hermetically sealed in
the tip of a shock resistant solid glass rod. They have
excellent long term stability.
APPLICATIONS:
The Type P60, P65, P85 and P100 THERMOPROBES are
recommended for all low cost, general purpose applications
involving temperature measurement, temperature control,
circuit temperature compensation, liquid level sensing or
fluid flow sensing. They are ideally suited for applications
which require a reliable, low cost sensor.
DATA:
All THERMOPROBES are aged for extended periods of time.
As such, they exhibit excellent stability for all service temper-
atures at or below the aging temperature. THERMOPROBES
which are manufactured with Material System “E” are aged
at 105°C; those manufactured with a Material System having
a 25°C/125°C ratio of 16.9 or less are aged at 200°C; and
all other Material Systems are aged at 300°C. Intermittent
operation at temperatures up to 600°C is permissible,
however, degraded stability will result when the aging
temperature is exceeded.
DIMENSIONS:
TINNED DUMET
.875”
(22mm)
CODING:
The code number to be ordered may be specified as follows:
P 100
B
B
104
M
Tolerance code letter (see NOTE 1 and TABLE B)
Zero-power resistance as 25°C (see NOTE 2)
Material System Code Letter (see TABLE A)
Probe Length Code Letter (See TABLE C for ordering codes.)
“B” = .250" ± .050"
“D” = .500" ± .063"
(See TABLE A for probe length restrictions.)
Nominal Probe Diameter in mils. (Specify 60, 65, 85 or 100.)
Style “P” denotes large bead-in-glass THERMOPROBE structure.
NOTE 1:
Special tolerances are available on request. Consult factory for special resistance tolerances, non-standard
resistances and/or non-standard temperatures.
NOTE 2:
The zero-power resistance at 25°C, expressed in Ohms, is identified by a three digit code number. The first two digits
represent significant figures, and the last digit specifies the number of zeros to follow. Example: 100k Ohms = “104”.
The standard resistance values are from the 24-Value series decade as specified in Military Standard MS90178.
1.0 / 1.1 / 1.2 / 1.3 / 1.5 / 1.6 / 1.8 / 2.0 / 2.2 / 2.4 / 2.7 / 3.0
3.3 / 3.6 / 3.9 / 4.3 / 4.7 / 5.1 / 5.6 / 6.2 / 6.8 / 7.5 / 8.2 / 9.1
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
TABLE A: THERMAL AND ELECTRICAL PROPERTIES:
The following table lists the THERMAL and ELECTRICAL properties for all LARGE BEAD-IN-GLASS THERMOPROBES.
All definitions and test methods are per MIL-PRF-23648.
THERMISTOR TYPE:
BODY DIMENSIONS:
Max. Diameter:
Standard
code “B”
“L”
Lengths:
code “D”
Length Codes Available
(Special Order Only)
P60
P65
P85
P100
{
.060"
.250"
.500"
(1.5 mm)
(6.3 mm)
(12.7 mm)
“A”, “C”
.065"
.250"
.500"
(1.7 mm)
(6.3 mm)
(12.7 mm)
“A”, “C”
.085"
(2.2
.250"
(6.3
.500" (12.7
“A”, “C”, “F”,
mm)
mm)
mm)
“H”
.100"
(2.5 mm)
.250"
(6.3 mm)
.500" (12.7 mm)
“A”, “C”, “F”, “H”
“K”, “M”, “P”, “R”
lead-wires:
Nom. Diameter:
Minimum Lead Length:
Lead Material:
MATERIAL SYSTEM:
CODE
R-vs-T
LETTER
CURVE
E
A
A
A
A
A
A
A
B
B
B
B
B
B
B
B
D
D
0
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
.008"
(.20 mm)
.875"
(22 mm)
Tinned Dumet
Nominal
Resistance
Range @ 25°C
(Ohms)
30
51
150
360
750
1.5k
3.6k
6.2k
9.1k
27k
43k
75k
160k
360k
750k
1.5M
3.0M
8.2M
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
51
150
360
750
1.5k
3.6k
6.2k
9.1k
27k
43k
75k
160k
360k
750k
1.5M
3.0M
8.2M
20M
.008"
(.20 mm)
.875"
(22 mm)
Tinned Dumet
Nominal
Resistance
Range @ 25°C
(Ohms)
30
51
150
360
750
1.5k
3.6k
6.2k
9.1k
27k
43k
75k
160k
360k
750k
1.5M
3.0M
8.2M
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
51
150
360
750
1.5k
3.6k
6.2k
9.1k
27k
43k
75k
160k
360k
750k
1.5M
3.0M
8.2M
20M
.012"
(.30 mm)
.875"
(22 mm)
Tinned Dumet
Nominal
Resistance
Range @ 25°C
(Ohms)
30
51
150
360
750
1.5k
3.6k
6.2k
9.1k
27k
43k
75k
160k
360k
750k
1.5M
3.0M
8.2M
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
51
150
360
750
1.5k
3.6k
6.2k
9.1k
27k
43k
75k
160k
360k
750k
1.5M
3.0M
8.2M
20M
.012"
(.30 mm)
.875"
(22 mm)
Tinned Dumet
Nominal
Resistance
Range @ 25°C
(Ohms)
30
51
150
360
750
1.5k
3.6k
6.2k
9.1k
27k
43k
75k
160k
360k
750k
1.5M
3.0M
8.2M
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
51
150
360
750
1.5k
3.6k
6.2k
9.1k
27k
43k
75k
160k
360k
750k
1.5M
3.0M
8.2M
20M
25/125
RATIO
5.0
11.8
12.5
14.0
16.9
19.8
22.1
22.7
29.4
30.8
32.3
35.7
38.1
45.0
48.1
56.5
75.6
81.0
THERMAL TIME CONSTANT:
Still Air at 25°C:
Plunge into Water:
DISSIPATION CONSTANT:
Still Air at 25°C:
Still Water at 25°C:
POWER RATING: (in air)
Maximum Power Rating:
100% Max. Power to:
Derated to 0% at:
.60 mW/°C
3.00 mW/°C
.65 mW/°C
3.30 mW/°C
.85 mW/°C
4.00 mW/°C
1.00 mW/°C
5.00 mW/°C
12 sec
300 msec
13 sec
320 msec
16 sec
400 msec
22 sec
600 msec
.060 Watts
200°C
300°C
.065 Watts
200°C
300°C
.085 Watts
200°C
300°C
.100 Watts
200°C
300°C
RESISTANCE -VS- TEMPERATURE CHARACTERISTICS: The nominal resistance range for the zero-power resistance at 25°C is shown
for each large bead-in-glass THERMOPROBE Type and each available Material System. Each Material System is denoted by an
ordering Code Letter, a referenced Curve number and the nominal 25°C/125°C resistance ratio.
TABLE B: STANDARD TOLERANCES:
Tolerance Code Letter
± % Tolerance at 25°C
F
1
G
2
J
5
K
10
L
15
M
20
N
25
P
30
Q
40
R
50
S
Non-standard – consult factory
TABLE C: PROBE LENGTH CODES:
Nominal Probe Length:
Probe Length Code Letter:
.125"
A
(Refer to TABLE A for length options.)
.250"
B
.375"
C
.500"
D
.750"
F
1.00"
H
1.25"
K
1.50"
M
1.75"
P
2.00"
R
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