Temperature Sensors
Platinum RTDs
FUNCTIONAL BEHAVIOR
R
T
R
0
(1+AT+BT
2
−100CT
3
+CT
4
)
RT Resistance ( ) at temperature T (°C)
R
0
Resistance ( ) at 0°C
T Temperature in
°C
A
+
B
−
C
T<0
2
100
100
CONSTANTS
Alpha,
(°C
-1
)
0.00375
±0.000029
1.605
±
0.009
0.16
3.81×10
-3
-7
HEL-700 Series
ACCURACY VS TEMPERATURE
Tolerance
Temperature
(°C)
−200
−100
0
100
0.003850
±0.000010
1.4999
±
0.007
0.10863
3.908×10
-3
-7
Standard
±0.2%
±
R*
( )
6.8
2.9
2.0
2.9
5.6
8.2
11.0
12.5
15.1
by 10 for 100
Optional
±0.1%
±
R*
( )
5.1
2.4
1.0
2.2
4.3
6.2
8.3
9.6
10.4
±
T
(°C)
1.2
0.6
0.3
0.6
1.2
1.8
2.5
3.0
3.3
−
100
4
±
T
(°C)
1.6
0.8
0.5
0.8
1.6
2.4
3.2
4.0
4.8
RTD.
200
300
400
500
600
*1000
RTD. Divide
Delta,
(°C)
Beta,
A
(°C )
-1
(°C)
B
(°C )
-2
−6.02×10
0 and C
−5.775×10
C
(°C
-4
)
Both
−6.0×10
-12
0 for T>0°C
−4.183×10
-12
NIST CALIBRATION
NIST traceable calibration provides resistance readings at 1, 2 or
3 standard temperature points to yield a resistance versus tem-
perature curve with 10x better accuracy.
Calibration
T (°C)
-200
-100
0
100
200
300
400
500
600
1 Point
±
T (°C)
0.9
0.5
0.03
0.4
0.8
1.2
1.6
2.0
2.6
2 Point
±
T (°C)
—
0.27
0.03
0.11
0.2
0.33
0.5
0.8
1.2
3 Point
±
T (°C)
—
0.15
0.03
0.07
0.08
6.2
8.3
9.6
10.4
RESISTANCE VS TEMPERATURE CURVE
SPECIFICATIONS
Sensor Type
Temperature Range
Temperature Accuracy
Base Resistance and
Interchangeability, R
0
±
R
0
Linearity
Time Constant
Operating Current
Stability
Self Heating
Insulation Resistance
Construction
Lead Material
Thin film platinum RTD;
R
0
1000 @ 0°C; alpha 0.00375 / /°C
R
0
100 @ 0°C; alpha 0.00385 / /°C
TFE Teflon:
−200°
to
+260°C
(−320° to
+500°F)
Fiberglass:
−75°
to
+540°C
(−100° to
+1000°F)
±0.5°C
or 0.8% of temperature,
°C
(R
0
±0.2%
trim), whichever is greater
±0.3°C
or 0.6% of temperature,
°C
(R
0
±0.1%
trim), whichever is greater (optional)
1000
±
2
1000
±
1
(±0.2%) @ 0°C
(±0.1%) @ 0°C (optional)
±0.1%
of full scale for temperatures spanning
−40°
to
+125°C
±2.0%
of full scale for temperatures spanning
−75°
to
+540°C
<0.5
sec. 0.85 inch O.D. in water at 3 ft/sec;
<1.0
sec, 0.85 inch O.D. in still water
2 mA maximum for self heating errors of
<1°C;
1 mA recommended
<0.25°C/year;
0.05°C per 5 years in occupied environments
<15
mW/°C for 0.85 O.D. typical
>50
M
at 50 VDC at 25°C
Alumina case; Epoxy potting (Teflon leads); Ceramic potting (fiberglass leads)
Nickel coated stranded copper, Teflon or Fiberglass insulated
88
Honeywell MICRO SWITCH Sensing and Control 1-800-537-6945 USA
1-815-235-6847 International 1-800-737-3360 Canada
HONEYWELL [ HONEYWELL SOLID STATE ELECTRONICS CENTER ]
