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Series-VPT
Velocity Pitot Tubes
- Reliable airflow sampling: The VPT Series aluminum velocity pitot tubes are designed to sample airflow in HVAC ducts and equipment applications.
- Ideal for fan and airflow monitoring: Used to monitor fan operation and true airflow in systems with varying amounts of static pressure.
- Flexible installation options: Available in 4" and 8" single-point probe lengths, with kit options that include two VPT probes and flexible tubing.
- Durable aluminum construction: Built for long-term use in duct applications with an operating temperature range of -40 to 185°F.
- Simple tubing connection: 45° barbed fittings accept 1/8" through 1/4" ID flexible plastic tubing for easy connection to pressure switches or transmitters.
- Designed for accurate placement: Mounts parallel to the airstream with the probe tip facing directly into airflow to support dependable velocity pressure readings.
- HVAC service friendly: Compact flange-mounted design installs through a 1/4" duct hole and is suitable for common duct pressure and airflow monitoring setups.
- Compliance-ready product: Listed with RoHS2, WEEE, and REACH agency approvals for use in modern building automation applications.
Product Overview
- Flange Diameter 1.5 in
- Hole Diameter 0.25 in
- Kit Description 4” VPT (2) with Tubing (0.17” ID X 0.25” OD, 10’ (2))
- Materials Aluminum
- Media Compatibility Clean dry air / inert gas, Inert / non-reactive gases, Non-Corrosive Dry Gases
- Mounting Parallel to air stream (+/- 7 Degrees)
- Mounting Hole Diameter 3/16 in
- Operating Temperature, Max 185 °F
- Operating Temperature, Min -40 °F
- Pipe Connection Note 45º Barbed Type (6 Places), accepts 1/8” through 1/4” ID flexible plastic tubing
- Relative Humidity 0 to 90% RH (non-condensing)
- Series ID Series-VPT
- Storage Temperature, Max 185 °F
- Storage Temperature, Min -40 °F
Supported Applications
The ACI Series VPT Velocity Pitot Tubes are Aluminum velocity pressure (impact) probes designed to sample air flow in HVAC duct or equipment applications. The series is used to monitor fan operation and true air flow with varying amounts of static pressure in non-critical applications.
Operating Conditions & Performance
The VPT Series operates within an ambient temperature range of -40 to 185°F (-40°C to 85°C) and a humidity range of 0 to 90% RH (non-condensing). For accurate readings, the probe should be mounted approximately 5 to 8 duct diameters downstream from elbows, obstructions, or large changes in duct area. The impact tube mounting angle must be parallel to the air stream (+/- 7 Degrees), with the tip opening directly into the air stream as indicated by the mounting arrow on the probe.
Configuration Options
The series is constructed from Aluminum and features a 1.50" (38.1 mm) diameter mounting flange with three 3/16" (4.76 mm) mounting holes spaced at 0.50" (12.70mm). The probe includes six 45° barbed tubing connections that accept 1/8" through 1/4" ID flexible plastic tubing.
Available configurations include:
- VPT: Single-point sensing with a 4" (101.6 mm) insertion length and overall length of 4.00" (101.60mm).
- VPT-8": Single-point sensing with an 8" (203.2 mm) insertion length and overall length of 8.00" (203.20mm).
- VPT KIT 4": Includes two VPT probes (4") paired with tubing (0.17" ID X 0.25" OD, 10' each), providing dual sensing points.
- VPT KIT 8": Includes two VPT-8" probes (8") paired with tubing (0.17" ID X 0.25" OD, 10' each), providing dual sensing points.
The series holds RoHS2, WEEE, and Reach agency approvals.
Key Product Differences
Variants differ primarily by insertion length (4" or 8") and packaging configuration. The standard VPT and VPT-8" models are single probes with one sensing point each. The KIT variants bundle two matching-length probes with flexible plastic tubing to enable dual-point measurement setups.
