WP303D - Sensor Scientific

Sensor Scientific interchangeable wafer thermistors

are ideally suited for applications requiring a high-

precision temperature sensor, without a high cost.

Interchangeability eliminates the burden of individual

calibration. Units are available in resistance values from

2k ohms to 100k ohms @ 25°C. The available resistance

vs. temperature curves (SSi curves C, D, E & Y)

are industry-standard. Interchangeable wafer thermistors

are widely used in the medical, automotive, aerospace,

HVAC, marine electronic, and instrumentation industries

in a variety of temperature measurement, control, and

compensation applications. If a standard unit does not

meet your needs, customized tolerances, resistance

values, temperature ranges, and termination options are

available. Design assistance is also available.

FEATURES:

• HIGH ACCURACY

• HIGH STABILITY

• INTERCHANGEABLE FROM 0°C TO 70°C

OPTIONS:

• CUSTOMIZED LEAD AND TERMINATION CONFIGURATIONS

• NON-STANDARD RESISTANCE VALUES

• NON-STANDARD TOLERANCES

• NON-STANDARD OPERATING RANGES

• NON-STANDARD RESISTANCE VS TEMPERATURE CURVES

Part Number

Resistance ±0.2 Deg ±0.5 Deg ±1.0 Deg C R. vs. Temp. Lead Lead

@ 25 Deg C tolerance tolerance tolerance Curve Diameter Length

ohms inches inches

2000 WM202C WN202C WP202C C 0.0126 1.5 min

2252 WM222C WN222C WP222C C 0.0126 1.5 min

3000 WM302C WN302C WP302C C 0.0126 1.5 min

4000 WM402C WN402C WP402C C 0.0126 1.5 min

5000 WM502C WN502C WP502C C 0.0126 1.5 min

10000 WM103C WN103C WP103C C 0.0126 1.5 min

10000 WM103Y WN103Y WP103Y Y 0.0126 1.5 min

30000 WM303D WN303D WP303D D 0.008 2.0 min

30000 WM303E WN303E WP303E E 0.0126 1.5 min

50000 WM503D WN503D WP503D D 0.008 2.0 min

100000 WM104D WN104D WP104D D 0.008 2.0 min.

INTERCHANGEABLE WAFER THERMISTORS

— Dissipation Constant: 1.5 mW/°C Typ. in still air —

— Time Constant: 10 sec. Typ. in still air —

Call us toll-free at 800-524-1610 (in the US) — or check us out on the web at www.sensorsci.com

Sensor Scientific, Inc. • 6 Kings Bridge Road - Fairfield, New Jersey 07004 • Phone: (973) 227-7790 • Fax: (973) 227-8063

eMail: sales@sensorsci.com • web: www.sensorsci.com

Resistance Multiplier and Alpha Values for Standard and Interchangeable Wafers

Sensor Scientific, Inc.

Temp ºF Temp ºC Multiplier Alpha Multiplier Alpha Multiplier Alpha Multiplier Alpha Multiplier Alpha

-40.0 -40.0 21.30 -5.7 16.10 -5.2 33.61 -6.7 40.64 -6.9 29.48 -6.3

-31.0 -35.0 16.07 -5.6 12.48 -5.0 24.24 -6.4 28.89 -6.7 21.63 -6.1

-22.0 -30.0 12.23 -5.4 9.746 -4.9 17.68 -6.2 20.76 -6.5 16.02 -5.9

-13.0 -25.0 9.389 -5.2 7.671 -4.7 13.03 -6.0 15.08 -6.3 11.98 -5.7

-4.0 -20.0 7.267 -5.0 6.081 -4.6 9.701 -5.8 11.06 -6.1 9.033 -5.6

5.0 -15.0 5.670 -4.9 4.855 -4.4 7.291 -5.6 8.193 -5.9 6.869 -5.4

14.0 -10.0 4.457 -4.7 3.902 -4.3 5.530 -5.4 6.123 -5.7 5.266 -5.2

23.0 -5.0 3.530 -4.6 3.157 -4.2 4.232 -5.3 4.617 -5.6 4.068 -5.1

32.0 0.0 2.815 -4.5 2.569 -4.1 3.265 -5.1 3.510 -5.4 3.166 -4.9

41.0 5.0 2.260 -4.3 2.104 -3.9 2.539 -5.0 2.690 -5.2 2.481 -4.8

50.0 10.0 1.827 -4.2 1.733 -3.8 1.990 -4.8 2.078 -5.1 1.958 -4.7

59.0 15.0 1.485 -4.1 1.435 -3.7 1.571 -4.7 1.617 -4.9 1.556 -4.5

68.0 20.0 1.215 -4.0 1.195 -3.6 1.249 -4.5 1.267 -4.8 1.243 -4.4

77.0 25.0 1.000 -3.8 1.000 -3.5 1.000 -4.4 1.000 -4.7 1.000 -4.3

86.0 30.0 0.8275 -3.7 0.8411 -3.4 0.8056 -4.3 0.7943 -4.5 0.8089 -4.2

95.0 35.0 0.6884 -3.6 0.7108 -3.3 0.6530 -4.1 0.6349 -4.4 0.6580 -4.1

104.0 40.0 0.5757 -3.5 0.6035 -3.2 0.5325 -4.0 0.5106 -4.3 0.5382 -4.0

113.0 45.0 0.4838 -3.4 0.5147 -3.1 0.4367 -3.9 0.4130 -4.2 0.4425 -3.9

122.0 50.0 0.4085 -3.3 0.4408 -3.1 0.3601 -3.8 0.3360 -4.1 0.3656 -3.8

131.0 55.0 0.3466 -3.2 0.3791 -3.0 0.2985 -3.7 0.2748 -4.0 0.3036 -3.7

140.0 60.0 0.2953 -3.2 0.3273 -2.9 0.2487 -3.6 0.2259 -3.9 0.2533 -3.6

149.0 65.0 0.2527 -3.1 0.2837 -2.8 0.2082 -3.5 0.1867 -3.8 0.2122 -3.5

158.0 70.0 0.2172 -3.0 0.2469 -2.7 0.1752 -3.4 0.1550 -3.7 0.1786 -3.4

167.0 75.0 0.1874 -2.9 0.2156 -2.7 0.1480 -3.3 0.1293 -3.6 0.1510 -3.3

176.0 80.0 0.1623 -2.8 0.1889 -2.6 0.1256 -3.2 0.1084 -3.5 0.1281 -3.2

185.0 85.0 0.1411 -2.8 0.1660 -2.5 0.1070 -3.2 0.0912 -3.4 0.1092 -3.2

194.0 90.0 0.1231 -2.7 0.1465 -2.5 0.0916 -3.1 0.0771 -3.3 0.0934 -3.1

203.0 95.0 0.1078 -2.6 0.1296 -2.4 0.0787 -3.0 0.0654 -3.2 0.0801 -3.0

212.0 100.0 0.0947 -2.6 0.1150 -2.4 0.0678 -2.9 0.0558 -3.2 0.0690 -2.9

221.0 105.0 0.0834 -2.5 0.1024 -2.3 0.0587 -2.9 0.0477 -3.1 0.0597 -2.9

230.0 110.0 0.0738 -2.4 0.0914 -2.2 0.0510 -2.8 0.0409 -3.0 0.0517 -2.8

239.0 115.0 0.0654 -2.4 0.0818 -2.2 0.0444 -2.7 0.0353 -2.9 0.0450 -2.8

248.0 120.0 0.0582 -2.3 0.0734 -2.1 0.0388 -2.7 0.0305 -2.9 0.0393 -2.7

257.0 125.0 0.0519 -2.3 0.0660 -2.1 0.0341 -2.6 0.0264 -2.8 0.0344 -2.6

266.0 130.0 0.0464 -2.2 0.0596 -2.0 0.0300 -2.5 0.0230 -2.8 0.0302 -2.6

275.0 135.0 0.0416 -2.2 0.0538 -2.0 0.0264 -2.5 0.0201 -2.7 0.0266 -2.5

284.0 140.0 0.0374 -2.1 0.0488 -1.9 0.0234 -2.4 0.0176 -2.6 0.0235 -2.5

293.0 145.0 0.0337 -2.1 0.0443 -1.9 0.0207 -2.4 0.0154 -2.6 0.0208 -2.4

302.0 150.0 0.0304 -2.0 0.0403 -1.9 0.0185 -2.3 0.0136 -2.5 0.0184 -2.4

Temp ºF Temp ºC Multiplier Alpha Multiplier Alpha Multiplier Alpha Multiplier Alpha

-40.0 -40.0 43.76 -7.0 22.26 -5.8 14.52 -5.1 23.98 -5.9

-31.0 -35.0 31.00 -6.8 16.70 -5.6 11.33 -4.9 17.93 -5.7

-22.0 -30.0 22.19 -6.6 12.66 -5.5 8.908 -4.7 13.52 -5.6

-13.0 -25.0 16.04 -6.4 9.675 -5.3 7.061 -4.6 10.29 -5.4

-4.0 -20.0 11.71 -6.2 7.460 -5.1 5.640 -4.4 7.893 -5.2

5.0 -15.0 8.628 -6.0 5.800 -5.0 4.538 -4.3 6.103 -5.1

14.0 -10.0 6.413 -5.9 4.545 -4.8 3.677 -4.1 4.755 -4.9

23.0 -5.0 4.807 -5.7 3.588 -4.7 2.999 -4.0 3.732 -4.8

32.0 0.0 3.632 -5.5 2.853 -4.5 2.461 -3.9 2.949 -4.6

41.0 5.0 2.766 -5.4 2.284 -4.4 2.033 -3.8 2.346 -4.5

50.0 10.0 2.122 -5.2 1.841 -4.3 1.688 -3.7 1.879 -4.4

59.0 15.0 1.640 -5.1 1.493 -4.1 1.410 -3.5 1.514 -4.3

68.0 20.0 1.276 -5.0 1.218 -4.0 1.185 -3.4 1.227 -4.1

77.0 25.0 1.000 -4.8 1.000 -3.9 1.000 -3.3 1.000 -4.0

86.0 30.0 0.7885 -4.7 0.8253 -3.8 0.8484 -3.2 0.8196 -3.9

95.0 35.0 0.6256 -4.6 0.6848 -3.7 0.7232 -3.1 0.6754 -3.8

104.0 40.0 0.4993 -4.5 0.5712 -3.6 0.6194 -3.1 0.5594 -3.7

113.0 45.0 0.4008 -4.3 0.4788 -3.5 0.5327 -3.0 0.4656 -3.6

122.0 50.0 0.3236 -4.2 0.4032 -3.4 0.4602 -2.9 0.3893 -3.5

131.0 55.0 0.2626 -4.1 0.3411 -3.3 0.3991 -2.8 0.3271 -3.4

140.0 60.0 0.2142 -4.0 0.2899 -3.2 0.3475 -2.7 0.2760 -3.4

149.0 65.0 0.1756 -3.9 0.2474 -3.1 0.3037 -2.7 0.2339 -3.3

158.0 70.0 0.1447 -3.8 0.2120 -3.0 0.2664 -2.6 0.1990 -3.2

167.0 75.0 0.1198 -3.7 0.1824 -3.0 0.2345 -2.5 0.1700 -3.1

176.0 80.0 0.0996 -3.6 0.1575 -2.9 0.2071 -2.5 0.1458 -3.0

185.0 85.0 0.0832 -3.6 0.1365 -2.8 0.1835 -2.4 0.1255 -3.0

194.0 90.0 0.0697 -3.5 0.1187 -2.8 0.1631 -2.3 0.1084 -2.9

203.0 95.0 0.0587 -3.4 0.1036 -2.7 0.1454 -2.3 0.0940 -2.8

212.0 100.0 0.0496 -3.3 0.0907 -2.6 0.1300 -2.2 0.0817 -2.8

221.0 105.0 0.0421 -3.2 0.0797 -2.6 0.1166 -2.2 0.0713 -2.7

230.0 110.0 0.0359 -3.2 0.0702 -2.5 0.1048 -2.1 0.0624 -2.6

239.0 115.0 0.0307 -3.1 0.0621 -2.4 0.0945 -2.1 0.0548 -2.6

248.0 120.0 0.0263 -3.0 0.0550 -2.4 0.0854 -2.0 0.0482 -2.5

257.0 125.0 0.0226 -3.0 0.0489 -2.3 0.0773 -2.0 0.0426 -2.5

266.0 130.0 0.0196 -2.9 0.0436 -2.3 0.0702 -1.9 0.0377 -2.4

275.0 135.0 0.0169 -2.8 0.0389 -2.2 0.0639 -1.9 0.0335 -2.4

284.0 140.0 0.0147 -2.8 0.0349 -2.2 0.0583 -1.8 0.0298 -2.3

293.0 145.0 0.0128 -2.7 0.0313 -2.1 0.0533 -1.8 0.0266 -2.3

302.0 150.0 0.0112 -2.7 0.0282 -2.1 0.0488 -1.7 0.0238 -2.2

Material Curve A B C D E

Available Resistance 100 to 2,000 30 to 500 1,000 to 25,000 10,000 to 100,000 1,000 to 50,000

Range at 25ºC in ohms

Alpha at 25ºC -3.84% -3.51% -4.39% -4.67% -4.30%

Material Curve F T X Y

Available Resistance 100,000 to 300,000 2,000 to 50,000 15 to 250 1,000 to 10,000

Range at 25ºC in ohms

Alpha at 25ºC -4.81% -3.89% -3.34% -4.03%