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Special Applications

Hermetically Sealed, Glass Encapsulated Style Thermistors
MINI-SENSOR


RTI MINI-SENSOR™ thermistors are small, rugged, hermetically sealed, glass encapsulated (DO-35) devices which are especially useful in applications where extreme temperatures and severe environmental conditions are encountered. They are supplied with Negative Temperature Coefficient characteristics and are available in a broad range of resistance values.

Their high sensitivity makes them especially useful in applications such as temperature measurement, temperature control, liquid level indication, flow measurement and temperature compensation. These low cost devices exhibit excellent long term stability and repeatability.

 Dimensions Resistance/Temperature Chart

MINI-SENSOR™ Specifications

part
Number

Resistance* @ 25°C ohms ±10%

Temp.Coeff. %/°C @ 25°C

Resist. Ratio R@25°C
R@125°C

Resistance Temp Characteristics
(See Table)

  D.C.** MW/°C

  T.C.***
SEC.

Max Temp. °C
MSB202K 2,000 -3.9 19.7 B 2 8 204
MSB502K 5,000 -3.9 19.7 B 2 8 204
MSB103K 10,000 -3.9 19.7 B 2 8 204
MSC103K 10,000 -4.4 29.25 C 2 8 204
MSB153K 15,000 -3.9 19.7 B 2 8 204
MSC203K 20,000 -4.4 29.25 C 2 8 204
MSC253K 25,000 -4.4 29.25 C 2 8 204
MSC503K 50,000 -4.4 29.25 C 2 8 204
MSC753K 75,000 -4.4 29.25 C 2 8 204
MSC104K 100,000 -4.4 29.25 C 2 8 204
MSC154K 150,000 -4.4 29.25 C 2 8 204
* Other resistance tolerances available.
** Dissipation Constant.
*** Time Constant.

Resistance/Temperature Tables
To determine resistance at any specified temperature, multiply resistance factor by thermistor resistance at 25°C

Table B Table C

Specified
Temp.

Resistance
Factor

  

Specified
Temp.

Resistance
Factor
-60 75.0   -60 140.5
-50 39.7   -50 67.0
-40 21.7   -40 33.7
-30 12.5   -30 17.7
-20 7.42   -20 9.71
-10 4.50   -10 5.53
0 2.82   0 3.27
+10 1.83   +10 1.99
+20 1.22   +20 1.25
+25 1.00   +25 1.00
+30 0.828   +30 0.806
+40 0.576   +40 0.533
+50 0.406   +50 0.360
+60 0.292   +60 0.249
+70 0.212   +70 0.175
+75 0.182   +75 0.148
+80 0.157   +80 0.126
+90 0.120   +90 0.0916
+100 0.0920   +100 0.0679
+110 0.0723   +110 0.0511
+120 0.0569   +120 0.0389
+125 0.0508   +125 0.0342
+130 0.0455   +130 0.0301
+140 0.0368   +140 0.0236
+150 0.0300   +150 0.0185
+160 0.0297   +160 0.0147
+170 0.0206   +170 0.0120
+180 0.0174   +180 0.0098
+190 0.0148   +190 0.0081
+200 0.0128   +200 0.0066

Resistance Ratios

Composition B: (R@ 25°C)/(R @ 125°C) = 19.7 ± 10%

Composition C: (R@ 25°C)/(R @ 125°C) = 29.25 ± 10%

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