Thermal Drones for Inspection
A thermal drone carries a camera that sees heat instead of light, so it can spot hot solar panels, overheating power line joints, roof leaks and people at night from the air. For inspection work in Pakistan, the main choices in our range are the DJI Mavic 3 Thermal, DJI Matrice 30T, DJI Matrice 350 RTK with a thermal payload, and Autel EVO II Dual 640T V3. All are Category II drones, so they need PCAA registration, a Remote Pilot Licence and, often, written permission.
Updated 8 November 2026
How a thermal camera works
Every object gives off infrared energy depending on its temperature. A thermal sensor, called a microbolometer, measures this energy and turns it into an image where warmer areas look brighter or are shown in colour palettes like "ironbow" or "white hot". It does not need light, so it works at night, but it cannot see through walls or glass: glass reflects infrared, which is why window readings are often wrong.
Resolution matters. The drones in our range use 640x512 thermal sensors, which is the common professional standard. Lower-resolution sensors (such as 160x120 or 320x256) show less detail from the same height.
Radiometric vs non-radiometric
A radiometric thermal camera records a temperature value for each pixel, so you can measure the exact temperature of a hot spot later in software. A non-radiometric camera only shows relative hot and cold. For solar, electrical and building reports that clients will read, radiometric images are the standard. Check the spec sheet on each product page. DJI's thermal drones save R-JPEG radiometric images that open in DJI Thermal Analysis Tool.
Readings depend on emissivity (how well a surface gives off heat), distance, humidity and sun reflection. Shiny metal can give false readings, so inspectors set emissivity and fly at consistent angles.
Solar farm inspection
Pakistan's solar growth, from rooftop systems to large plants, has made solar inspection a major use. A faulty cell, cracked panel, failed bypass diode or dirty string shows up as a hot spot on a thermal image. A drone can cover a plant in a fraction of the time a walking crew needs, and the images help prioritise repairs.
Tips: fly on clear days with strong sunlight (inspection guidelines usually ask for high irradiance), fly at a consistent height and angle, avoid reflections of the sun, and pair thermal with visual images to confirm dirt versus real faults.
Power lines, substations and buildings
- Power lines and substations: loose or corroded joints heat up under load, and a thermal camera picks them up from a safe distance. Zoom cameras help read tags and inspect insulators without flying close.
- Buildings: thermal images show missing insulation, roof leaks (wet areas cool differently) and water pipes in walls. Flights in the early morning or evening give the best contrast.
- Industry: tanks, pipelines, boilers and kilns can be checked for leaks and hot spots.
Electrical and industrial sites are usually sensitive areas, so written permission from the site owner and the authorities comes first.
Search, rescue and security
Thermal drones help find people at night, in crops or after floods, and fire teams use them to see hot spots through smoke. Pakistan's monsoon floods have shown the value of aerial search. These are usually government or rescue operations; private operators should work only with the authorities and written permission, especially given the security situation and 2026 drone restrictions.
Choosing the right thermal drone
- DJI Mavic 3 Thermal (DJI Mavic 3 Thermal (M3T)): foldable, about 920 g, 640x512 thermal, 48MP wide camera and 56x hybrid zoom, about 45 minutes. Best for solar, roofs and quick jobs carried by one person.
- DJI Matrice 30T (DJI Matrice 30T (M30T)): about 3.78 kg, 640x512 thermal, 48MP zoom with 16x optical, wide camera and laser rangefinder, weather resistant, about 41 minutes. Best for utilities and industrial teams.
- DJI Matrice 350 RTK (DJI Matrice 350 RTK): a heavy platform that takes Zenmuse payloads such as the H20T thermal-zoom camera, with RTK positioning. Best for large contracts and mapping.
- Autel EVO II Dual 640T V3 (Autel EVO II Dual 640T V3): 640x512 thermal plus a high-resolution visual camera, about 38 minutes. A strong alternative to DJI.
Compare them in Matrice 30T vs Mavic 3 Thermal (DJI Matrice 30T vs DJI Mavic 3 Thermal) and Mavic 3 Thermal vs Autel 640T (DJI Mavic 3 Thermal vs Autel EVO II Dual 640T V3).
Software and reporting
The drone is half the job. Inspectors need software to analyse radiometric images, mark faults, and build reports with GPS locations. DJI Thermal Analysis Tool is free for DJI R-JPEG files, and mapping software, such as DJI Terra for supported drones, can build thermal maps. Clients usually want a report listing each fault, its temperature difference, location and a visual photo, so plan the workflow before you buy.
Starting a thermal inspection service
Many Pakistani operators start with solar and rooftop inspections, then move to industrial clients. A sensible path:
- get the legal basics first: PCAA registration, a Remote Pilot Licence and an understanding of permissions
- learn thermography basics; formal thermography training (for example Level 1 courses offered internationally) helps you read images correctly
- start with one versatile drone such as the Mavic 3 Thermal, and add a Matrice when contracts need zoom, rangefinding or weather resistance
- build a standard report template and keep sample reports to show clients
Clients such as solar EPC firms, factories and housing societies often ask for proof of registration and licence, so keep copies ready. See enterprise drones (Enterprise Drones) for the full range.
Rules for thermal inspection in Pakistan
All thermal drones in our range weigh over 250 g, so under the Civil Unmanned Aircraft Rules 2024 they are Category II: you must register them with the PCAA within 15 days of purchase and hold a Remote Pilot Licence (Geo News, 16 June 2024). Operators of Category II drones must also log flights in the CAA's electronic system (Dawn, 24 June 2024). Night flights and flights over towns need permission from the PCAA.
In 2026, outdoor drone flying has been restricted by the Interior Ministry's nationwide order of 27 February 2026 and provincial Section 144 bans. In Punjab, district Safe Drone Usage Committees give written permission for approved operations (The Nation, 29 September 2026). Check the drone ban status (Drone Ban Status in Pakistan: Federal and Provincial Tracker) page and apply for permission before any job. Last checked: October 2026.
