Velocity Traverse (Mobile)

Portal · Desktop · Testo help · Offline (all devices)

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Offline on this device

Not installed yet

Install once on any phone, tablet, or computer. Works with no signal; updates when you’re back online.

Notes & formulas

Velocity = 1096 × √(VP ÷ density). Density = (1.325 × baro) ÷ (temp °F + 459.69).
Duct size in inches. Baro: 29.92 inHg standard.

Project info

Project #

Customer

Equipment ID

Serial #

Traverse location

Traverse #

Technician

Onsite date

Report date

Duct & conditions

Circular (diameter in.) Rectangular (L × W in.)

Diameter (in.)

L (in.)

W (in.)

Baro (inHg)

Temp (°F)

Design flow (ACFM)

Testo 510i / 405i capture

Pick probe unit below. 510i = VP · 405i = FPM. Read Smart App → Capture.

510i — VP / ΔP (in. w.g.) 405i — Velocity (FPM)

Next cell: Point 1 · Position 1

510i (pitot): select VP · read inH₂O in Smart App · Capture.
405i (hot wire): select FPM · read ft/min in Smart App · Capture (app converts to VP for the report).
Optional: put 405i air temp into Temp (°F) above. Import CSV when you have a full log. Details: TESTO-METER.md

Velocity pressure (10 pts × 5)

Report

Free area

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Density factor

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Design velocity (FPM)

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Actual velocity (FPM)

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Actual flow (ACFM)

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% of design

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Graphs

Capture traverse points to see graphs.

Velocity heatmap (FPM) · 10 × 5

<70% 70–90% 90–110% 110–120% >120% of design velocity

Average velocity by point (FPM)

Design vs actual