VAP^3® | Electronics

VAP^3®

Eastern Instruments' VAP^3® Pitots have a unique Velocity Averaging and Parallel Plate proprietary design. When inserted in air flow ducts, the VAP^3® Pitots provide an accurate, differential pressure output allowing for precise air flow measurement or control of your process. VAP^3® Pitots are designed for Superior Accuracy (SA) for clean air applications or plug resistant (PA) for heavy particulate-laden applications. The VAP^3® Pitots can be installed in existing or new ducts or incorporated into flow-conditioning devices, such as the High Beta®, designed for short duct run applications with turbulent air flow or to obtain optimal accuracy. Each VAP^3® Pitot has multiple total and static sensing ports, specifically located to provide a full traverse of the duct, thus eliminating the concern of highly random distribution of air flow. For larger ducts, an array of pitots, with total and static pressure lines manifolded, can be installed to ensure an equal area traversing and fully averaged air flow sampling. The VAP^3® Pitots are erosion resistant and can handle typical process temperatures from -40° to 700°F. Other engineered options are available for temperatures outside this range. The VAP^3® Pitots are constructed from a single-piece series 6063 aluminum extrusion that has a Teflon^® (DuPont) impregnated hard-anodizing metallurgical surface treatment applied, yielding a surface hardness of Rockwell 65C.

VAP^3®/SA - Industrial Velocity Averaging Parallel Plate Pitot For Standard Applications

A proprietary design for relatively clean air applications and for Superior Accuracy (SA), the VAP^3®/SA air flow measurement pitots are ideal for either new or retrofit process applications. When inserted in air flow ducts, the VAP^3®/SA provides an accurate, differential pressure output allowing for precise air flow measurement and control of your process to as low as ±0.50% when calibrated. The VAP^3®/SA pitots can also be incorporated within flow-conditioning devices, such as the High Beta^®, designed for short duct run applications with turbulent air flow, or to obtain the maximum accuracy.

VAP^3®/PA Industrial Velocity Averaging Parallel Plate Pitot For Heavy Particulate Applications

A proprietary design for Particulate-laden applications (PA), the VAP^3®/PA air flow measurement pitots are ideal for either new or retrofit processes, and power generation applications. When inserted in air flow ducts, the VAP^3®/PA provides an accurate, differential pressure output allowing for precise air flow measurement and control of your process to as low as ±2% when calibrated, utilizing a plug-resistant design. The VAP^3®/PA pitots can also be incorporated within flow-conditioning devices, such as the High Beta^®, designed for short duct run applications with turbulent air flow, or to obtain the maximum accuracy.

Duct Section VAP^3®

• Either VAP^3®/PA or VAP^3®/SA
• Duct mounted measurement with VAP^3® Pitots installed in place, utilizing straightening vanes
• There is no converging section of the High Beta^®
• Available in sizes from 4 to 36“ in 2-inch increments (custom sizes are available)
• Available in a number of material, flange, and pressure configurations


For more information on these products, go to their Technical Information and Specifications pages.

Differential Pressure System - DPS

The DPS, when coupled to the VAP^3® pitot, is used to deliver flow measurement for process and power applications. The microprocessor-based flow transmitter consists of a differential pressure transmitter and flow processor. The system transmits an analog output signal that is proportional to flow. The processor enables the DPS to take a temperature and/or a duct static pressure input signal, providing a density-compensated output signal in wide range of flow units. With the fast scan time of the DPS and a selectable moving average of the display and output variables, the DPS can deliver a reliable, accurate signal, converting the fast response of the VAP^3® pitot to the digital control systems of today.

The DPS can be used in conjunction with the Line Mounted Purge (listed below).

Differential Pressure Unit - DPU

The DPU, when coupled to the VAP^3® pitot is used to deliver accurate, dependable flow measurement in process and power applications. The Pressure and Flow Transmitter and Display Unit consists of a differential pressure transmitter and an optional display. The DPU can be configured to display differential pressure or flow rate and will transmit a 4-20mA analog output signal that is proportional to the displayed value. The DPU can also be configured to simply be an enclosed pressure unit with or without a display and transmit the actual differential pressure in a 4-20mA signal.

The DPU can be used in conjunction with the Line Mounted Purge Block (listed below).

Differential Pressure Gauge - DPG

The DPG, when coupled to the VAP^3® pitot, is used to deliver a reliable flow measurement for process and power applications. The Pressure and Flow Display consists of a differential pressure gauge manifolded within an industrial enclosure. It can be configured to display differential pressure in inches of H₂O, as well as flow rate in customer defined units.

The unit is accurate to within +/- 2% and is suited for clean, dry, non-corrosive air. It is rated for internal pressures from -10 to 10 psig (-68.6 to 68.9 kPa) and temperatures from 20° to 140° F (-6.67° to 60° C). When just a differential pressure display is needed, the DPG is the ideal solution.


For more information on these products, go to their Technical Information and Specifications pages.

Integrated Heated Pitot - IHP

The IHP is Eastern Instruments' newest product!! Our Integral Heated Pitot utilizes the original VAP^3® Pitot technology by providing an accurate differential pressure output, that allows for precise air flow measurement and control of your process. Our Integral Heated Pitot can be installed in clear-air or particulate-laden applications, and it retains the accuracy of our original VAP^3® (±2%). However, by incorporating integral controlled heaters our pitots can now function in conditions where ice build-up is present. With a heating system, that involves a heat tracing element integrated into the pitot itself, the problems with ice build-up are solved. The pitots no longer frost over, the surface area of the pitot itself is not effected due to the ice-build up, and therefore, the accuracy of our pitot is unaffected by the onslaught of conditions like freezing rain, or even the extreme temperatures surrounding cooling towers.

For more information please click here.

Line Mounted Purge - LMP

The LMP is a continuous purge system intended to be used with VAP^3® Pitots by Eastern Instruments. The LMP is designed to supply a continuous balanced flow of air through the impulse lines and out of the probes sensing ports during flow measurement. The unit consists of an anodized aluminum purge block and capillary/internal filter set with ports tapped to receive NPT fittings, an optional mounting bracket (ordered separately), and a filter assembly.

Remote Temperature Sensor (RTS)

The Remote Temperature Sensor (RTS) is a temperature-measuring device that can be remotely mounted to a duct or pipe via a half coupling. It is the perfect alternative when an integrated temperature option cannot be used with a VAP^3® Pitot or when a High Beta^® Flow-conditioning device is installed. When used with a DPS flow transmitter, the RTS can provide the temperature input when temperature and pressure correction are required.

VAP^3®Insertion Port w/ Blank-off Plate - VIP

The VAP^3® Insertion Ports (VIP) are used to mount the VAP^3® Pitots to the duct. They come in a variety of materials of construction and will be configured to match the contour of the duct. Standard port lengths are 2 inches and 6 inches long, with the mounting plate size matching that of the pitot. They are supplied with a blank off plate to allow the user to have the ports welded to the duct prior to the installation of the VAP^3® Pitots.