Type-S Pitot Tubes are used to measure gas velocities. When the pitot is faced into the gas stream, the pressure difference between the two ports can be used to calculate the velocity pressure.

• Type-S design with large openings that resist plugging and maintain calibration in harsh environments
• Manufactured to U.S. EPA Method 2 specifications with a baseline coefficient of 0.84 and optional wind tunnel calibration
• Compact design fits easily in sampling ports and is suitable for determining cyclonic flow and yaw-angle measurement
• Available in 3/16", 1/4", 5/16" and 3/8" OD tubing in stainless steel, Alloy 600, Alloy 310 or Alloy C276
• Telescoping Type-S pitot probe for traversing larger stacks in a compact package
• 2-Dimensional (3-hole) and 3-D (5-hole) probes measure yaw and pitch of nonuniform flows, plus a Method 2C standard pitot for saturated gas streams

Type-S Pitot Tube Construction

Parameter	Specification
Tube OD options	3/16", 1/4", 5/16", 3/8"
Materials	Stainless Steel, Alloy 600 (Inconel), Alloy 310 (Stainless Steel), Alloy C276 (Hastelloy)
Baseline coefficient	0.84 (wind tunnel calibration available upon request)
Oversheath options	1/2" (3/16 only), 5/8", 3/4", 1", 2"
Thermocouple options	No TC, Stack TC 2" back flush, Stack TC 3/4" offset, Stack TC well
Termination options	Pistol grip or H back

Telescopic Type-S Pitot (U-PTX)

Parameter	Specification
Design	Pitot tube with 1" OD oversheath connected to a 2" OD extension with adjustable clamp
Sample lines	Two lines and one TC, three lines and one TC, or five lines and one TC
Tubing material	PFA heavy wall (1/4" or 3/8" OD), PTFE with stainless steel overbraid (1/4" or 3/8" ID), or 316 stainless steel (1/4" or 3/8")
Recommended tubing	1/4" ID PTFE with stainless steel overbraid
Thermocouple	PFA or glass insulated Type-K with overbraid
Quick connect size	1/4" QC or 3/8" QC

Standard Pitot Tube for Method 2C (PT2C)

Parameter	Specification
Design	Modified hemispherical-nosed pitot with shortened stem and enlarged impact and static pressure holes
Application	Saturated gas streams where back-purging is ineffective
Pitot coefficient	0.99 unless wind tunnel calibrated
Lengths	24", 36", 48", 60"
Oversheath options	1" (recommended over 6'), 2" (recommended over 12')

Multi-Dimensional Probes

Parameter	Specification
2-Dimensional Probe (2DPT2)	3-hole pitot used in Method 2G to measure velocity pressure and yaw angle of the flow velocity vector; inclinometer determines calibrated yaw offset; inserts into 2" diameter probe extension
3-D Pitot (3DPT2)	5-hole prism-shaped pitot measuring yaw and pitch of nonuniform flows; yaw determined by nulling pressure across symmetric ports, pitch calculated from probe-specific calibration curves
3-D Pitot re-calibration (PT-CAL-3D)	Required within 12 months of first field use after most recent calibration or after 10 field tests, whichever occurs later, and after any visible damage to the 3-D head

Pitot Tubes Specifications  Download