HVAC Field ToolProduct Concept
Duct Sizer.
A pocketable frame gauge that springs open to capture any rectangular duct opening up to 48″ × 48″, reads it digitally, then collapses back into your tool pouch.
Up to48″Digital LCDFits the box
Open it up
drag to size the openingOpeningMeasuring
Width
24″
Height
14″
Diagonal · square chk27 13/16″
24″
14″
Common duct sizes
Front view · on the opening
24″
14″
24×14
CORNERS 1 & 3
Retractable tapes
Spring-loaded steel tapes pay out to close the frame and feed the encoders.
CORNERS 2 & 4
Rigid lock arms
Telescoping square tubes ratchet out and cam-lock to hold the frame square.
BODY
Digital LCD readout
Reads W × H to 1/16″ with a diagonal squareness check.
LEVERS
One-hand release
Squeeze both amber levers and the arms retract back into the body.
How it works
two systems, four corners24×14
1
3
2
4
- Hook the tape cornersSet the two tape-reel corners into opposite corners of the duct opening.
- Ratchet the rigid arms outPush the telescoping arms until the frame seats flush, then they cam-lock.
- Read the LCDEncoders in every corner report W × H instantly, accurate to 1/16″.
- Squeeze & collapseBoth amber levers release the arms; everything springs back into the body.
Folds to fit
spec sheetStates · to scale
0×0
~7 × 4 × 2″
→
Expanded
up to 48 × 48″
- MEASURING RANGE
- 6″ – 48″ per side
- RESOLUTION
- 1/16″ (0.1″ digital)
- READOUT
- Backlit LCD · W × H × diag
- STOWED SIZE
- ~7 × 4 × 2″
- WEIGHT
- ~1.9 lb (0.86 kg)
- HOUSING
- Glass-filled nylon + TPR
- POWER
- 2× AAA · auto-off
Duct Sizer · concept prototype · not to manufacturing specRev A