ISOKINETIC SAMPLING PROBES

ESC sampling probes are precision-made, modular assemblies that include the probe sheath, probe liner and heating mantle. Probe assemblies are available in numerous configurations and materials to accommodate any isokinetic sampling method or unusual conditions that you may encounter. All probe assemblies, sheaths, liners and heating mantles are ordered by effective length which is one foot shorter than overall length.

Made from stainless steel alloy 316 for standard applications or Inconel alloy 600 for high temperature and extremely corrosive applications. Each sheath includes a stack thermocouple, 1/4" Orsat sample line with 1/4" male quick connect, 3/8" pitot lines with modular pitot tip and 3/8" male quick connects, 1" sheath and 5/8" Teflon-coated stainless steel nozzle union. 

A 1.75" or 2" oversheath is recommended for long length probes, for medium length probes with Pyrex or Quartz liners, for rigidity or for applications where a packing gland is required, such as high positive pressure, high negative pressure or highly toxic stacks.

Probe Sheath Accessories

The M17-SR Strain Relief is a probe mounted adapter used to hold the weight of a sample transfer lines to relieve stress at the probe liner connection.

The PRS-HANDLE is useful for handling an extremely hot probe or maneuvering the probe in the absence of a sample case monorail.

Probe Liners

Available in Pyrex, Quartz, Stainless Steel, Inconel and Teflon. Standard liners are equipped with a #28 Ball with O-ring. Pyrex and Quartz liners are available with integrated nozzles either with or without the #28 Ball with O-ring. The GPA-B28-10 Ball adapter transforms a screw joint liner to a ball joint with O-ring end.

Our heating mantles are hand-made assemblies that are completely removable from the probe sheath and the probe liner. Standard heating mantles are comprised of electrical resistance wire, electrical thermal insulation, integrated type K probe thermocouple and power cord. Available on a semi-rigid mandrel if desired.

HIGH TEMPERATURE PROBES

ESC manufactures a variety of probes and liners for high temperature applications. Inconel Alloy 600 is recommended for corrosive, high temperature stacks. Inconel liners and nozzles or Quartz liners and nozzles would be appropriate for these applications. Inconel nozzle unions are provided with all high temperature probes, and graphite ferrules are recommended for all applications that do not prevent metals in the sample trail. Quartz liners with integrated nozzle are recommended for metals testing and for applications where nozzle unions may provide questionable leak-free fastening capability.

Alternative high temperature probes include water cooled and air cooled models. Water cooling is most effective in extremely high temperature applications, however extreme care must be taken to safely handle the excessive weight of a water cooled probe and orient the probe in manner that is either precisely horizontal or pitched with the nozzle end slightly downward to prevent steam buildup in the nozzle end. The water inlet deposits cool water behind the nozzle inside the oversheath jacket. As the water receives heat from the sample it rises towards the outlet end and is drained out of the water cooled probe. Safe and successful use of a water cooled probe is absolutely dependent upon a reliable source of water with substantial water pressure.

Air cooled probes can be effective in short lengths, however monitoring of effective cooling is critical to avoid sacrificing the probe and/or components further down the sample train. 

ISOKINETIC SAMPLING NOZZLES

ESC isokinetic sampling nozzles are buttonhook style nozzles available in Stainless Steel, Inconel, Pyrex, Quartz and Teflon-coated Stainless Steel. Standard nozzles have a 5/8" outlet shank and are designated by nominal ID of the tapered inlet in 1/32" increments (e.g. #4 nozzle = 4/32" = 1/8"). Taper joint outlet ends mate with taper joint inlet ends on the liner to provide leak-free joints without the use of a union.

Nozzle Sets

Standard nozzle sets are comprised of 7 nozzles sized from #4 (1/8") to #16 (1/2") packed in a foam lined case. We will include any 7 standard nozzle sizes in a set when requested.

NOZZLE UNIONS

5/8" nozzle unions are available in Stainless Steel (PRN-10U), Teflon-coated Stainless Steel (PRN-10UTC for union body only), Glass-filled Teflon (PRN-TU-B for union, nuts, and single ferrules) and Inconel (PRN-IUB for Inconel union body only). Stainless steel unions are supplied with front and rear stainless steel ferrules. Teflon and Teflon-coated unions are available with a single Teflon ferrule. Inconel unions are available with Monel front and rear ferrules or single graphite ferrules. Other useful sealing arrangements include an inverted stainless steel rear ferrule with a Viton O-ring or a single graphite ferrule for use with Pyrex or Quartz nozzles. These arrangements can also be used to avoid the permanent locking of stainless steel front and rear ferrules.