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Document overview
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Technical content
Sub-assembly encapsulated into closed end stainless steel sheath with threaded hub. For use in various com- mercial applications or severe environments. The NTC Type A990 Interchangeable sub-assemblies consist of matched pairs of small, glass encapsulated thermistor beads which are connected in either series or parallel circuit configurations. These sub-assemblies are available in a variety of styles which enable them to be used in measuring the temperature of liquids or solids or to be encapsulated into larger housings such as hypodermic needles or closed end sheaths. The sub-assemblies provide interchangeable resis- tance-temperature characteristics in extremely small, fast response packages which are easy to handle. The units shown are available from stock and/or with fast delivery. Resistance, tolerances and temperature ranges, other than those which are indicated, may be available upon special order. Other assembly configu- rations may be available upon special order. Please consult the factory for any special requests or modifi- cations. Maximum Operating or Storage Temperature for Optimum Stability is 221°F (105°C).
Applications
For insertion into metal housing or close tolerance openings Type A990C Fully immersible sub-assembly for use in conductive fluids. Type A990D Limited depth immersion or surface contact , for use in measuring the temperature of liquids or solids. Type A990E Fully immersible sub-assembly with additional me- chanical strain relief, for use in metal housings for liquid immersion or close tolerance openings. Type A990M Sub-assembly encapsulated into sharpened hypoder- mic needle with 3 ft (1 m) extension leads of #28 GA PVC wire. For use in various laboratory temperature measurements. Type A990P Standard sub-assembly encapsulated into vinyl cath- eter tubing with #28 GA PVC wire extension leads, for use in various commercial applications. Amphenol Advanced Sensors
NTC Type A990 Specifications Temperature Tolerance in °C Tolerance Code 0°C to 25°C 25°C to 50°C 50°C to 70°C 70°C to 105°C Curve Tolerances Resistance vs. Temperature Characteristics Temperature (°C) Resistance Code (Data in Ω) UN 103 UT 103 UN 223 UT 223 UN 443 UT 443 NTC Type A990 dimensions AAS-920-278A - 05/2014 www.amphenol-sensors.com © 2014 Amphenol Corporation. All Rights Reserved. Specifications are subject to change without notice. Other company names and product names used in this document are the registered trademarks or trademarks of their respective owners. Amphenol Advanced Sensors
Ordering Information
The code number to be ordered may be specified as follows: A990x (x = B, C, D, E, M, P or T) Code Resistance Code X See resistance code table Code Curve Tolerance X See curve tolerance table A990 - ___ - ___ - ___ - Typical model number