Duct traverse is a method for measuring airflow in ducts. It is a two step process; drilling holes on the duct at specific locations and reading the air velocity at specific locations in the duct. It involves a combination of using mathematical formulas, marking the ducts and airflow probes and the steady hands and judgement of a Technician to stick the probe in the opaque duct to read the air velocity. Some refer to duct traversing as an art, some call it skill and others think it is science. The plain truth is that a pro can perform a duct traverse at the same location under the same condition and end up with different results. The reason is obvious; duct traversing has not kept up with modern technological advancement until now. After over 30 years in Mechanical Engineering, Energy Management, Testing and Balancing and Building Commissioning, we present to the industry Auto Duct Traverse. We put all the Engineering formulation into instrument that gets laboratory results. With the Auto Duct Traverse, no special skills and training is required, it produces the same result every time, it is faster, safer and reading can be performed remotely. Step one, Duct Prep – The Bridge

• It attaches itself to the duct for handsfree operation.

• It read the width of the duct

• It pinpoints the locations of the holes for each duct size

• The bore keeps the drill bit from walking

• It is safer – you do not have to reach over ceiling grids to measure the duct size or mark it.

• Save time upward of 50% in this Step two, Reading Airflow – The ladder

• Holds and keeps the probe (pitot tube) parallel to the walls of the duct (typical of lab condition)

• It read the depth of the duct

• It pinpoints the location to read air velocity based on the duct depth

• Stop reading at any coordinate and continue without starting over

• Save time, upward of 25% in this step Round Ducts

• The round duct bridge also attached duct for hands free operation.

• The ladder attaches to the bridge, holds the pitot tube or probe tangent to the duct and keeps the probe sensor is parallel to the walls of the duct. Likewise, the probe travels through the true diameter of the duct for optimum accuracy.

• It measures the diameter of the duct

• It pinpoints the coordinates on both sides of the center of the duct and read the airflow on both sides through one hole.

• You can save upward of 40% of the time it takes to do it the old way not worthy Auto duct traverse measures airflow correctly irrespective of the angle or inclination of the duct either by design or by installation error. The traverse can be performed from the side of the duct or from the top like the duct on the roof. The auto duct traverse would give the same consistent accurate reading. Additional Benefits

• It is consistent; you get the same result each time

• You can read the velocity remotely with our Robbie Eye

• No special skills required

• It is safer – you read coordinate at eye level and on lower step of a step ladder

• No Ruler

•No need to markup pitot tube Traverse KitThe kit comes in a hard-shell protective case containing

• 1 each – 12″, 24”, 36” bridge for Rectangular Duct

• 1 each – 24″ and 36” ladder for rectangular duct

• 1 – Round Duct Bridge

• 1 – 18″ ladder for round duct

• 2 – 36″ ladder for round duct

• 1 – small box for cap plugsThe case can also hold 18” and 36″ pitot tube and our duct traverse commissioner rule. Auto Duct traverse is your resource to consistency and doing more in less time accurately.

Our diameter gauge measures pulley diameter with unparalleled precision and provides a means to accurately predict fan airflow between pulleys in seconds.

Additional Description
Weight 8 lbs
Dimensions 9 × 8 × 1.5 in

It comes with a chart.With that chart, you can accurately determine the airflow of a fan:

• In all the operating positions within a pulley

• Size of replacement pulley if necessary

• Operating position in the replacement pulley

• Size of the belt at all operating position.The Pulley GPS is your resource to analyze fan performance and proffers solution in a minute so that you can get the work done flawlessly at minimum time.Changing Airflow is a Breeze – See chart in pictures.Desired air flow= 5000 CFMMeasurement= 4500 CFMPulley: 4.75Belt size: BYou want to increase air flow by 500 CFM, 10%Solution: Using Pulley GPS OP, is #6.From OP #6 on the chart you move left.You can increase flow by either 8% or 11%, its your call.For 8% close the pulley by 3 half turns to OP #3.For 11% close the pulley by 4 half turns to OP #2If the pulley is too small or large for desired airflow, the lower chart will guide you to the right size.Other features

• Used at both digital and analog modes• Used as a micrometer• Built in belt sizer

T Rule is used to read duct width, validate traverse hole locations and to mark traverse points (hole locations) on duct with pinpoint accuracy. It is not common to get a duplicate result of a duct traverse at the same location under the same condition. That is the nature of duct traverse, except the technician uses our auto duct traverse equipment. Irrespective, an accurate traverse begins with drilling the holes at the correct location. This is the only aspect of the traverse process that is visible and easily verifiable. If the holes are not located accurately, then what would be the integrity of the reading in the duct? The T Rule is indispensable for Engineers, TAB Supervisors, Commissioning Agents, Construction managers and administrators with oversight for the quality of the work.