NTC Type A990 Series Thermometrics Thermistors
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.
For insertion into metal housing or close tolerance openings
Fully immersible sub-assembly for use in conductive fluids.
Limited depth immersion or surface contact, for use in measuring the temperature of liquids or solids.
Fully immersible sub-assembly with additional mechanical strain relief, for use in metal housings for liquid immersion or close tolerance openings.
Sub-assembly encapsulated into sharpened hypodermic needle with 3 ft (1 m) extension leads of #28 GA PVC wire. For use in various laboratory temperature measurements.
Standard sub-assembly encapsulated into vinyl catheter tubing with #28 GA PVC wire extension leads, for use in various commercial applications.
Sub-assembly encapsulated into closed end stainless steel sheath with threaded hub. For use in various commercial applications or severe enviroments.