Series 1 are our bare or ceramic insulated base metal (Series 1A) and noble metal element thermocouples (Series 1P).  This series also includes a style with the element already assembled in a terminal head and mounting nipple (Series 1C.)

Base metal or noble metal thermocouples with straight metallic (Series 2M), angled metallic (Series 2A), and semi-metallic (Series 2L) protection tubes.

A variety of base and noble metal thermocouples with ceramic protection tubes are covered in Series 3.  These include units with threaded mounting fittings of various sizes (Series 3F, 3G, 3H, and 3M), mounting sleeves (Series 3Q), mounting ferrules (Series 3V), or silicon carbide double (Series 3X and 3Y) protection tubes.

Series 4 are base metal thermocouples manufactured from insulated wire.  Styles include basic (Series 4W), in tube (Series 4A), washer mounting (Series 4L), cuttable (Series 4F), melt bolt (Series 4Y and 4Z), lead assemblies (Series 4X), and three bayonet mount styles including: Series 4B, Series 4C, and Series 4D.

Series 6 are base metal and noble metal "NABA-PAK" thermocouples manufactured from metal clad MgO insulated thermocouple material. These are available with numerous construction options including: a quick connect plug or jack (Series 6Q), pigtails (Series 6P), a transition to lead wire (Series 6L), a terminal head with optional mounting fitting (Series 6C), a terminal head with nipple-union-nipple (Series 6U), or a handle and coil cord (Series 6H).