Apex Instruments offers Button-Hook Nozzles in multiple materials. The size needed for isokinetic sampling depends on the stack gas velocity; the material depends on the stack temperature and the sampling method. The most popular nozzles are constructed from seamless 316 stainless steel and can be coated with FEP or SilcoSteelCR®. Other nozzle materials include Borosilicate Glass, Alloy 600 and Quartz. 

Standard sampling nozzles are 4” long and have a 5/8” o.d. shank for attaching to the probe union. Stainless steel nozzles are configured with an O-Ring to aid in positive leak checks. A bored out union is needed with Apex O-Ring nozzles, although a standard union can be used if the O-Ring is removed. Other sizes and configurations are available. Nozzles must be measured before initial use. Glass and Quartz Nozzles are available with a female 14/35 ground glass taper joint eliminating the need for the 5/8” union. For use with male taper joint probe liners.

Unique to Apex Instruments, the Nozzle Shank has integrated Ferrule with O-Ring Groove. Note: When using O-Ring, a Bored Union, (P/N: N-10UB) is required.

Isokinetic Nozzle Sets

Nozzle Sets include a selection of the most commonly used sizes and come packaged in a foam-lined carrying case for protection.  Each set contains 7 nozzles: sizes 4, 6, 8, 10, 12, 14, and 16.  The case (SH-NZ) can also be ordered separately.  Custom sets are also available.

NS-SET - Set of 7 Stainless Steel Nozzles

NG-SET - Set of 7 Glass Nozzles

NI-SET - Set of 7 Inconel Nozzles

NQ-SET - Set of 7 Quartz Nozzles

NST-SET - Set of 7 FEP Lined Nozzles

NZ-CAL - Nozzle Calibration