NTC Type AB6 Thermometrics Thermobeads and GCs (Chip-in-Glass) Description Applications NTC Type AB6 thermistor assemblies consist of small Thermobead and GC (chip-in-glass) assemblies are GC (chip-in-glass) or Thermobeads that are welded to used where the small thermistor must be further insulated extension leads. The Thermobeads or GC connected to longer leads, for insertion into deep (chip-in-glass) are hermetically sealed in glass and wells and cavities, or threading into long tubes. They have fine diameter 0.0007 in to 0.004 in (0.01778 mm may also be used, as is, for applications that require to 0.1016 mm) platinum alloy leads. The platinum leads fast response measure-ments in confined spaces. are cut short and welded to insulated extension leads With these assemblies, the fast response of the small and the joints are covered in one of several insulation thermistor is available without sacrificing ease of types, depending upon the application or environment. insertion. The added leads and insulation allow the The assembly is then ready for insertion into minute assemblies to be handled in further assembly hypodermic needles, catheters or other small housings operations, such as insertion into catheter lumens. that require extended leads. Any of the Thermobeads The same electrical characteristics that apply to the or GC (chip-in-glass) listed in Table I may be used in selected thermistor (resistance value, resistance ratio, a NTC Type AB6 assembly. Please consult the data stability) are unaltered in the assembly. shown for specific electrical or mechanical properties for the thermistor selected. Amphenol Advanced SensorsType C Insulation NTC Type AB6 AB6C8 Thermistor bead is welded to 38 gauge, nickel alloy 200, bifilar, heavy ISONEL insulated extension leads, 6.5 Specifications ft (1.98 m) 0.5 ft (0.15 m) long. Multiple conformal dipcoats of liquid epoxy resin are applied for complete insulation when immersed in fluids. Type A Insulation For use where fastest response times are required and assembly will be fully immersed in conductive fluids. AB6A8 Maximum continuous operating temperature is 221F Thermistor is welded to 38 gauge, nickel alloy 200, (105C). bifilar heavy ISONEL insulated extension leads, 6.5 ft (1.98 m) 0.5 ft (0.15 m) long. Liquid epoxy resin web 0.25 in (6.4 mm) reference 72 in (1830 mm) minimum over weld joints provides some strain relief. For insertion into plastic tubing or other insulators. Maximum continuous operating temperature is 221F D (105C). 0.13 in (3.2 mm) reference 72 in (1830 mm) minimum Type D Insulation D AB6D2 Thermistor is welded to 38 gauge, nickel alloy 200, bifilar, heavy ISONEL insulated extension leads, 6.5 Type B Insulation ft (1.98 m) 0.5 ft (0.15 m) long. Small web of epoxy is painted over weld joints for electrical isolation and AB6B2 strain relief, and a heat sealed mylar sheath covers the Thermistors welded to 38 gauge, nickel alloy 200, bead. bifilar, heavy ISONEL insulated extension leads, 6.5 For fast response times, limited depth of immersion, ft (1.98 m) 1/2 ft (0.15 m) long. Polyimide sleeve is and best long term immersion qualities. Maximum epoxied over weld joints and thermistor, for strain relief continuous operating temperature is 257F (125C). and insulation. For insertion into metal housings or tubings. Bead 1.5 in (38 mm) reference 72 in (1830 mm) minimum covered for maximum strain relief and protection. Maximum continuous operating temperature is 347F (175C). D 0.13 in (3.2 mm) reference 72 in (1830 mm) minimum D Type E Insulation AB6E3 AB6B4 Thermistor is welded to 38 gauge, nickel alloy 200, Thermistor is welded to 38 gauge, nickel alloy 200, bifilar, heavy ISONEL insulated extension leads 6.5 bifilar, heavy ISONEL insulated extension leads, 6.5 ft (1.98 m) 0.5 ft (0.15 m) long. Polyimide sleeve ft (1.98 m) 0.5 ft (0.15 m) long. Polyimide sleeve is is epoxied over welds for strain relief and electrical epoxied over weld joints and up to back of thermistor insulation, multiple conformal dip coatings of liquid bead, for strain relief and electrical insulation. epoxy resin are applied for complete immersibility in conductive fluids. For insertion into metal housings or tubings with close tolerances. Bead is exposed as much as possible For use in applications where fast response, good for faster response. Maximum continuous operating strain relief and full immersion are required. Maximum temperature is 221F (105C). continuous operating temperature is 221F (105C). 0.13 in (3.2 mm) reference 72 in (1830 mm) minimum 0.25 in (6.4 mm) reference 72 in (1830 mm) minimum 0.13 in (3.2 mm) reference D D