Mini-Sensor and Special Applications

Special Applications

Hermetically Sealed,
Glass Encapsulated Style
Thermistors

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
Specified Temp.	Resistance Factor
-60	75.000
-50	39.700
-40	21.700
-30	12.500
-20	7.420
-10	4.500
0	2.820
10	1.830
20	1.220
25	1.000
30	0.828
40	0.576
50	0.406
60	0.292
70	0.212
75	0.182
80	0.157
90	0.120
100	0.092
110	0.072
120	0.057
125	0.051
130	0.046
140	0.037
150	0.030
160	0.030
170	0.021
180	0.017
190	0.015
200	0.013

Table C
Specified Temp.	Resistance Factor
-60	140.500
-50	67.000
-40	33.700
-30	17.700
-20	9.710
-10	5.530
0	3.270
10	1.990
20	1.250
25	1.000
30	0.806
40	0.533
50	0.360
60	0.249
70	0.175
75	0.148
80	0.126
90	0.092
100	0.068
110	0.051
120	0.039
125	0.034
130	0.030
140	0.024
150	0.019
160	0.015
170	0.012
180	0.010
190	0.008
200	0.007

Resistance Ratios
Composition B: (R@ 25°C)/(R @ 125°C) = 19.7 ± 10%
Composition C: (R@ 25°C)/(R @ 125°C) = 29.25 ± 10%

Free Samples

RTI Electronics, Inc. 1800 E. Via Burton St. Anaheim, CA 92806-1213
Telephone: (714) 765-8200 • Fax: (714) 765-8201