Carrier SPS - Wiring Specifications; Mounting Location

Duct Air Temperature sensor
Carrier Sensors 21
Thermistor Resistance vs. Temperature Values for Duct Temperature
Sensor
10K Type II (CP/MCI)
Temp (F)
Temp (C)
Resistance (Ohms)
-40
-31
-22
-13
-4
5
14
23
32
41
50
59
68
77
86
95
104
113
122
131
140
149
158
-40
-35
-30
-25
-20
-15
-10
-5
0
5
10
15
20
25
30
35
40
45
50
55
60
65
70
335,651
242,195
176,683
130,243
96,974
72,895
55,298
42,315
32,651
25,395
19.903
15,714
12,494
10,000
8,056
6,530
5,325
4,367
3,601
2,985
2,487
2,082
1,752
Wiring specifications
The sensor includes a 75-inch cable. To extend the length, use the cable specified below.
Cable from sensor to controller: If <100 ft (30.5 meters) 22 AWG, unshielded
If >100 ft (30.5 meters) 22 AWG, shielded
Maximum length: 500 feet (152 meters)
Mounting location
Mount the sensor in the top or side of the supply duct.
Drill hole in top of duct
and let sensor hang down
Alternate location
inside of duct
Supply duct