ultra-stable probe thermistors ntc type sp series data the temperature class represents the maximum permissible continuous operating or storage tem- perature available. the stability group represents the maximum drift rate, in percent resistance change per year, of the thermistor, when operated or stored at all temperatures up to the maximum rating. ultra- stable probe thermistors should not be exposed to temperatures higher than the maximum rating, as this will degrade their stability and void the stability classifcation. when specifed, additional precon - ditioning can be preformed to stabilize units for a particular application. applications the ntc type sp60, sp65, sp85, and sp100 ultra- stable probe thermistors may be used in all temper - ature measurement and control applications with the added assurance of long term stability and reliability. they are the ideal choice for use as secondary stan - dards in laboratories. a mphenol advanced sensors the ntc type sp60, sp65, sp85, and sp100 ultra-stable probe thermistors have similar construction and dimensions to the type p60, p65, p85, and p100 probe thermistors. ultra-stable probe thermistors receive additional processing to assure their continuous use in one of three temperature classes and are catego - rized into one of six stability groups.
2 sp60/65/85/100 speciications ntc type sp60/65/85/100 dimensions thermal and lectrical properties the ollowing table lists the thermal and electrical properties or all ultra-stable probe thermistors. all defnitions and test methods are per mil- table a thermistor type sp60 sp65 sp85 sp100 body dimensions max. diameter .060 in (1.5 mm) .065 in (1.6 mm) .085 in (2.1 mm) .100 in (2.5 mm) standard lengths code a .125 in (3.2 mm) .125 in (3.2 mm) .125 in (3.2 mm) .125 in (3.2 mm) code b .250 in (6.3 mm) .250 in (6.3 mm) .250 in (6.3 mm) .250 in (6.3 mm) code d .500 in (12.7 mm) .500 in (12.7 mm) .500 in (12.7 mm) .500 in (12.7 mm) lead-wires nominal diameter .008 in (.20 mm) .008 in (.20 mm) .012 in (.30 mm) .012 in (.30 mm) minimum lead length lead material thermal time constant still air at 77f (25c) 12 sec 13 sec 16 sec 22 sec plunge into water dissipation constant still air at 77f (25c) .60 mw/c .65 mw/c .85 mw/c 1.00 mw/c still water at 77f (25c) 3.00 mw/c 3.30 mw/c 4.00 mw/c 5.00 mw/c power rating (in air) 100% maximum power rating @ 77f (25c) .048 watts .052 watts .068 watts .080 watts derated to 0% @ maximum temperature
3 stability classes (by nominal resistance at 77f (25c) ltra-stable probe thermistors availability depends upon nominal resistance at 77f (25c). stability class is indicated by a code letter or temperature class and a code number or stability group. xample a1 .02 maximum change per year at 221f (105c) maximum temperature. table b material system (all types 60/65/85/100) code letter r-vs-t curve 25/125 ratio nominal resistance range @ 77f (25c) ohms ( w ) code class a 221f (105c) maximum class b 392f (200c) maximum class c 572f (300c) maximum 0 5.0 30 to 51 a6 c6 a 1 11.8 51 to 150 a3 a4 a5 a6 b6 c6 a 2 12.5 150 to 360 a3 a4 a5 a6 b6 c6 a 3 14.0 360 to 750 a3 a4 a5 a6 b6 c6 a 4 16.9 750 to 1.5 a1 a2 a3 a4 a5 a6 b5 b6 c6 a 5 19.8 1.5 to 3.6 a1 a2 a3 a4 a5 a6 b5 b6 c6 a 6 22.1 3.6 to 6.2 a1 a2 a3 a4 a5 a6 b5 b6 c6 a 7 22.7 6.2 to 9.1 a1 a2 a3 a4 a5 a6 b5 b6 c6 b 8 29.4 9.1 to 27 a1 a2 a3 a4 a5 a6 b5 b6 c6 b 9 30.8 27 to 43 a2 a3 a4 a5 a6 b5 b6 c6 b 10 32.3 43 to 75 a2 a3 a4 a5 a6 b5 b6 c6 b 11 35.7 75 to 160 a2 a3 a4 a5 a6 b5 b6 c6 b 12 38.1 160 to 360 a2 a3 a4 a5 a6 b5 b6 c6 b 13 45.0 360 to 750 a2 a3 a4 a5 a6 b5 b6 c6 b 14 48.1 750k to 1.5m 1.5m to 3.0m 3.0m to 8.2m 8.2m to 20m
aas-920-248b - 12/2014 www.amphenol-sensors.com ? 2014 amphenol corporation. all rights reserved. specifcations ar e subject to change without notice. a mphenol advanced sensors ordering information the code number to be ordered may be specifed as follows: code model number sp 60 sp 65 sp 85 sp 100 code probe length a 1/8 in (3.175 mm) b 1/4 in (6.35 mm) d 1/2 in (12.7 mm) code material system code x see table b for codes code zero-power resistance @ 77f (25c)** 202 see note 2 code tolerance* f 1 g 2 j 5 k 10 l 15 m 20 n 25 p 30 q 40 r 50 s non-standard (specify value) code temperature class stability a 221f (105c) maximum b 392f (200c) maximum c 572f (300c) maximum code group (resistance change) 1 .02% per year 2 .05% per year 3 .075% per year 4 .1% per year 5 .2% per year 6 .5% per year sp ____ - ____ - ____ - ____ - ____ - ____ - ____ typical model number *special tolerances are available on request. consult the factory for special resistance tolerances, non-standard resistances and/or non- standard temperatures. **the zero-power resistance at 77f (25c), expressed in ohms, is identifed by a three digit code number. the frst two digits represent signifcant fgures, and the last digit specifes the number of zeros to follow. example: 2k ohms =202. the standard resistance val - ues are from the 24-value series decade as specifed in military standard ms90178. 1.0 / 1.1 / 1.2 / 1.3 / 1.5 / 1.6 / 1.8 / 2.0 / 2.2 / 2.4 / 2.7 / 3.0 3.3 / 3.6 / 3.9 / 4.3 / 4.7 / 5.1 / 5.6 / 6.2 / 6.8 / 7.5 / 8.2 / 9.1
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