HVAC Immersion Sensor

Immersion Sensor

The Sensor Scientific Immersion Sensor enables accurate temperature measurement in ducts, pipes and tanks from remote locations. This sensor can be utilized in mechanical equipment rooms. The assembly consists of 304 stainless steel tube housing, brass fitting and NTC thermistor. The stainless steel tube has 0.25” O.D. and lengths of 4”,8”,12” or 18”. Brass or stainless steel thermowell (optional) can be used to shield the stainless tube. Operating temperature range is from - 10°C to + 110°C ( +10°F to +230°F). Immersion Sensor is also available in an RTD (Resistance Temperature Detector) form with resistance values of 100, 500, 1,000 & 2,000 Ohms at 0°C.
Features:
  • High Accuracy NTC Thermistor
  • Stainless Steel Probe (4”,6”,8”,12”& 18”)
  • Brass Fitting
  • 8 FT Zipcord Lead PVC 22 AWG
Specifications:
  • High Accuracy +/- 0.2°C (0 to 70°C)
  • Standard Accuracy +/- 0.5 °C (0 to 70°C)
  • Industrial Accuracy +/- 1°C (0 to 70°C)
  • Dissipation Constant 3 mW/°C
Wiring: All electrical connections and wiring must comply with the National Electrical Code and with local electrical codes
Ordering Information
Thermistor: Select the appropriate type of thermistor to suit your instrumentation.
Housing: Select the appropriate length of stainless steel tube.
For example: 10K Ohm, 0.2°C accuracy /8" long tube -Model No. HVIM-WM103C/8
REFER TO THE HVAC EQUIPMENT AND SYSTEMS COMPATIBILITY CHART.
RESISTANCE
@ 25 Deg C 		ACCURACY MODEL/LENGTH ACCURACY MODEL/LENGTH ACCURACY MODEL/LENGTH
2,000 Ohms +/-0.2ºC HVIM-WM202C/x +/-0.5ºC HVIM-WN202C/x +/-1ºC HVIM-WP202C/x
3,000 Ohms +/-0.2ºC HVIM-WM302C/x +/-0.5ºC HVIM-WN302C/x +/-1ºC HVIM-WP302C/x
4,000 Ohms +/-0.2ºC HVIM-WM402C/x +/-0.5ºC HVIM-WN402C/x +/-1ºC HVIM-WP402C/x
5,000 Ohms +/-0.2ºC HVIM-WM502C/x +/-0.5ºC HVIM-WN502C/x +/-1ºC HVIM-WP502C/x
10,000 Ohms +/-0.2ºC HVIM-WM103Cx/ +/-0.5ºC HVIM-WN103C/x +/-1ºC HVIM-WP103C/x
30,000 Ohms +/-0.2ºC HVIM-WM303D/x +/-0.5ºC HVIM-WN303D/x +/-1ºC HVIM-WP303D/x
50,000 Ohms +/-0.2ºC HVIM-WM503D/x +/-0.5ºC HVIM-WN503D/x +/-1ºC HVIM-WP503D/x
100,000 Ohms +/-0.2ºC HVIM-WM104D/x +/-0.5ºC HVIM-WN104D/x +/-1ºC HVIM-WP104D/x
NTC Thermistor Characteristics:
Curve "C" for 1,000 to 25,000 ohms @ 25 deg.C

Curve "D" for 25,000 to 100,000 ohms @ 25 deg.C



Other Curves and Characteristics are Available.
NTC Interchangeable Chip Thermistor diagram
HVIM-WM302C HVIM-WM103C HVIM-WM104D
deg. C OHM deg. C OHM deg. C OHM
-10
-5
0
5
10
15
20
25
30
35
40
45
50
55
60
65
70
75
80
85
90
95
100
105
110		 16,585
12,693
9,795
7,619
5,972
4,715
3,748
3,000
2,417
1,959
1,597
1,310
1,080
895
746
624
525
444
376
321
274
236
203
176
153		 -10
-5
0
5
10
15
20
25
30
35
40
45
50
55
60
65
70
75
80
85
90
95
100
105
110		 55,304
42,316
32,650
25,394
19,903
15,713
12,493
10,000
8,056
6,531
5,325
4,367
3,601
2,986
2,488
2,083
1,752
1,480
1,256
1,071
916
787
679
587
510		 -10
-5
0
5
10
15
20
25
30
35
40
45
50
55
60
65
70
75
80
85
90
95
100
105
110		 612,342
461,661
351,000
269,026
207,798
161,700
126,727
100,000
79,430
63,491
51,059
41,302
33,598
27,479
22,592
18,668
15,500
12,930
10,835
9,119
7,707
6,540
5,571
4,764
4,089
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