Thermal Drones for Bridges and Hard Infrastructure
Concrete that has delaminated no longer conducts heat the way sound concrete does. After a sunny day, a bridge deck sheds heat unevenly, and a thermal pass shows the unsound areas as a pattern — the same information a chain-drag survey produces, without closing a lane. The mission puts unusual demands on the aircraft. Much of the work happens from below or beside a span, where GPS is unreliable, prop wash is tight against a surface, and the operator needs a stable close-range image. A payload that is compact and a flight controller that holds position without satellites matter as much as sensor resolution, and a radiometric record is what lets an engineer defend the finding in a report.
Get a free infrastructure payload recommendationRecommended drone & thermal payload
3 picks
DJI Matrice 4TD
$7,499
Compact enough to fly close around a pier or under a deck, with integrated radiometric thermal and obstacle sensing for tight work.
Sentera 6X Thermal Pro Sensor Kit for Matrice 300 / Matrice 350 / Matrice 400
$21,350
A radiometric thermal sensor packaged for Matrice 300 / 350 / 400-class aircraft, for teams that need higher-resolution capture on a heavy-lift airframe.
Autel Alpha with L35T Gimbal Utility Inspection Package
$21,603
Airframe and radiometric gimbal in one inspection package, for crews surveying structures alongside utility assets.
What this mission demands
Stable flight without satellites
Under a deck, GPS drops out. Vision and obstacle sensing that hold position close to a surface matter more here than in open-air missions.
Close-range image detail
Delamination reads as a pattern at a metre or two of standoff, so a sharp close-range thermal image with no motion blur is the whole job.
Radiometric records
An engineering report needs a recorded temperature and a timestamp per image, not a screenshot from a live feed.
Repeatable comparison
Infrastructure inspections are cyclical. The same route flown the same way each cycle is what shows whether a defect has grown.
Bridge & infrastructure aircraft & thermal payloads
24 products
China640×512, 8mm lens, 25 mK NETD, LRF, 50MP RGB, 16x hybrid zoom, IP44 rated, 1.18kg, 42 min flight time · 25mK NETD · 437yd detection · 31oz · 24-month warranty
437 yd detection
or $1,292/mo · 0% APR
China384 resolution · 12-month warranty
or $817/mo · 0% APR
China384 resolution
or $812/mo · 0% APR
China384 resolution · 12-month warranty
≈490 yd detection (modeled)
or $2,445/mo · 0% APR
384 resolution · 12-month warranty
Detection range not published
China384x288 · 19mm lens · 45mK NETD · Dual Sensor · DJI M300 · 480g · 200yd detection · 16oz · 36-month warranty
200 yd detection
or $625/mo · 0% APR
China384 resolution · 12-month warranty
or $2,186/mo · 0% APR
China384 resolution · 43oz · 12-month warranty
≈490 yd detection (modeled)
or $665/mo · 0% APR
China384 resolution · 12-month warranty
≈490 yd detection (modeled)
or $912/mo · 0% APR
China384 resolution · 12-month warranty
or $75/mo · 0% APR
China384 resolution · 12-month warranty
or $142/mo · 0% APR
China384 resolution · 12-month warranty
or $67/mo · 0% APR
USA384 resolution · 12-month warranty
or $50/mo · 0% APR
640 resolution
or $4,526/mo · 0% APR
Japan384 resolution · 12-month warranty
USA384 resolution · 12-month warranty
or $35/mo · 0% APR
China384 resolution · 40.1oz · 24-month warranty
≈530 yd detection (modeled)
or $400/mo · 0% APR
Japan384 resolution · 12-month warranty
China384 resolution · 12-month warranty
or $157/mo · 0% APR
384 resolution · 28oz · 60-month warranty
or $50/mo · 0% APR
China384 resolution · 12-month warranty
or $29/mo · 0% APR
USA384 resolution · 12-month warranty
Detection range not published
China384 resolution · 24-month warranty
≈370 yd detection (modeled)
or $952/mo · 0% APR
USA384 resolution · 24-month warranty
Detection range not published
or $3/mo · 0% APR
Questions buyers ask
Yes, when the deck is heated and cooling. Delaminated concrete loses its thermal bond, so the area cools differently from sound concrete and shows as a pattern in the thermal image. It is a screening method; findings are still verified by sounding or coring.