FLIR C5 Compact Thermal Camera
True 160×120 thermal with Wi-Fi reporting.
- 160 × 120 true thermal detector (19,200 pixels)
- MSX overlays visual edges on the thermal image
- -20 to 400 °C measurement range
- Wi-Fi upload to FLIR Ignite for reports
Best Thermal Cameras for Home Inspection
Compare the top thermal imagers for real-world home inspection: insulation gaps, air leaks, moisture and electrical hot spots.
- Independent Research
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See the Heat
Find the Leak
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Our Top Picks
A thermal camera shows heat you cannot see: missing insulation, air leaks, wet drywall and warm breakers. These picks were selected from manufacturer specifications and owner feedback for home inspection work; we do not claim laboratory testing.
FLIR One Pro (USB-C)
Plugs into an iPhone; guided inspections in the app.
- 160 × 120 detector, upscaled to 480 × 360 with VividIR
- Stated accuracy ±3 °C or ±5% (15 to 35 °C ambient)
- Step-by-step home inspection guides in the app
- Drop-rated to 1.5 m
TOPDON TC004 Mini
Standalone camera with 15 hours of battery.
- 128 × 128 detector enhanced to 240 × 240 (TISR)
- -20 to 450 °C, stated accuracy ±2 °C or ±2%
- 40° × 30° field of view, 25 Hz refresh
- Up to 15 hours per charge
No pick matches that combination yet. Try a wider budget or a different measurement.
Comparison Table
View Full Comparison→| Product | Detector | Temp Range | Stated Accuracy | Form / Connection | Battery | |
|---|---|---|---|---|---|---|
| FLIR C5 | 160 × 120 true thermal, MSX | -20 to 400 °C | ±3 °C or ±3% (FLIR class spec) | Handheld, Wi-Fi to Ignite | Rechargeable | View |
| FLIR One Pro | 160 × 120, 480 × 360 display | -20 to 400 °C | ±3 °C or ±5% | iPhone USB-C attachment | About 1 hour | View |
| TOPDON TC004 Mini | 128 × 128, 240 × 240 TISR | -20 to 450 °C | ±2 °C or ±2% | Handheld, no Wi-Fi | Up to 15 hours | View |
| FLIR TG165-X | 80 × 60 (4,800 px), MSX | -25 to 300 °C | See manufacturer sheet | Spot thermometer with laser, IP54 | Rechargeable | View |
| HSFTOOLS HP96 | 96 × 96, 240 × 240 super-res | See listing | Manufacturer states within class spec | 3.5-inch touchscreen, 50° FOV | Up to 4 hours | View |
Detector figures are the native sensor resolution followed by the manufacturer's upscaled display resolution where they differ. Accuracy figures are manufacturer-published; a blank means the listing does not state one.
How to Choose a Thermal Camera
Four specifications decide whether a camera will show you the problem:
Native Resolution
Count the real detector pixels (160 × 120, 128 × 128), not the upscaled number. More pixels mean smaller defects from further away.
Thermal Sensitivity
NETD tells you the smallest temperature difference the camera can show. Under 70 mK is good for building work.
Range and Accuracy
Houses need -20 to 150 °C. Electrical work needs more, plus a tighter accuracy figure.
Workflow
Visual overlay, Wi-Fi reporting and battery life decide whether you use the camera or leave it in the drawer.
Frequently Asked Questions
View All FAQs→What resolution do I need for home inspection?
A native 160 × 120 detector shows studs, insulation gaps and moisture patterns clearly from a few meters. 128 × 128 and 96 × 96 cameras work at closer range. Upscaled figures such as 240 × 240 or 480 × 360 are display enhancements, not extra detector pixels.
Can a thermal camera see moisture?
Indirectly. Wet materials evaporate and cool, so a damp patch shows as a cooler area on the thermal image. Confirm with a moisture meter before opening a wall, because a cold spot can also be a draft or a pipe.
When is the best time to scan a house?
When there is at least a 10 °C difference between inside and outside, typically early morning in winter or after the heating has run for a few hours. Small temperature differences hide insulation defects.
Smartphone camera or standalone?
Smartphone cameras are cheaper for the same detector and use the phone screen. Standalone cameras have longer batteries, survive job sites better and do not tie up your phone. For occasional home use the phone attachment is usually enough.
Are thermal cameras accurate enough for electrical work?
For finding a hot breaker or connection, yes. For quantifying a temperature rise against a standard, you need a camera with a stated accuracy of ±2 °C or better and correct emissivity settings. Live electrical work also requires the appropriate PPE and qualifications.
Reviews
FLIR C5 Compact Thermal Camera Best Overall
The C5 is a pocket-sized camera with a real 160 × 120 microbolometer, which is the difference between seeing a stud pattern behind drywall and guessing at a blur. FLIR's MSX feature traces visible edges from the built-in visual camera onto the thermal image so that a cold patch is obviously the corner of a window rather than a shape floating in space.
The measurement range is -20 to 400 °C, wide enough for both a chilly attic and a hot breaker, and the touchscreen makes changing palettes and span quick. Wi-Fi uploads images to FLIR Ignite, where a report can be built and emailed without a card reader.
The cost is the trade-off: it is the most expensive camera here. FLIR states a typical accuracy of ±3 °C or ±3% for this class, and the 2-10 warranty (two years on the camera, ten on the detector) is the longest in the group.
Strengths
- True 160 × 120 detector
- MSX edge overlay
- Wide -20 to 400 °C range
- Wi-Fi cloud reporting and 2-10 warranty
Limitations
- Premium price
- Small 3.5-inch screen for detailed work
- Cloud account needed for Ignite
FLIR One Pro (USB-C) Best for Smartphones
The FLIR One Pro turns a phone into a thermal camera with the same 160 × 120 detector class as the C5, at a lower price, because the phone supplies the screen, storage and processing. This USB-C version fits iPhone 15 and newer; an Android USB-C model exists separately.
The FLIR One app includes guided inspections for air leaks, moisture and insulation, which is genuinely useful the first few times you point a thermal camera at a wall and wonder what the colors mean. VividIR upscales the image to 480 × 360 for display, and MSX adds visual edges.
FLIR states ±3 °C or ±5% accuracy when the camera is between 15 and 35 °C and the scene is between 5 and 120 °C, which rules out serious electrical work but covers everything in a house. The battery is separate from the phone's and runs for about an hour, and the dongle is drop-rated to 1.5 m.
Strengths
- True 160 × 120 detector at a mid-range price
- Guided inspection workflow
- Uses the phone screen and storage
- Drop-rated
Limitations
- Separate battery to charge, about an hour of use
- Model is phone-connector specific
- Narrower accuracy envelope than the C5
TOPDON TC004 Mini Best Value
The TC004 Mini is the least expensive standalone camera we would recommend for house work. Its native detector is 128 × 128, which TOPDON's TISR processing upscales to 240 × 240 for display; that is enough to see stud lines, a missing bat of insulation or a warm circuit breaker, though fine detail is softer than on the FLIR C5.
The specification sheet is otherwise strong: -20 to 450 °C, a stated accuracy of ±2 °C or ±2%, a 25 Hz refresh rate that does not smear when you pan, and automatic hot, cold and center-spot markers with a high-temperature alarm. A 15-hour battery means it can do a whole house and the attic without a charger.
It has no Wi-Fi and no visual-edge overlay, so images are pure thermal, and there is no cloud reporting. The manual is a QR-code download. For a first thermal camera it is a sensible buy.
Strengths
- Lowest cost standalone camera here
- 15-hour battery
- Fast 25 Hz refresh and auto hot/cold markers
- Wide temperature range
Limitations
- 128 × 128 native resolution
- No visual overlay or Wi-Fi
- Electronic manual only
Buying Guide
Short answer: buy the FLIR C5 if you inspect regularly and want reports, the FLIR One Pro if you want the same detector class on your phone for occasional use, and the TOPDON TC004 Mini if you want a standalone camera for the least money.
What a thermal camera actually shows
Every object above absolute zero emits infrared radiation, and a thermal camera’s detector maps that radiation to a temperature and a color. It does not see through walls; it sees the surface temperature of the wall, which is affected by what is behind it. A missing bat of insulation lets heat through, so the drywall in front of it is warmer in winter. Wet drywall evaporates and reads cooler. A loose electrical connection heats up.
Resolution: count the real pixels
Marketing loves upscaled numbers. The number that matters is the native detector array. 160 × 120 (19,200 pixels) is the practical minimum for whole-room work at a few meters; 128 × 128 and 96 × 96 cameras are usable at closer range. Super-resolution processing (TISR, VividIR and similar) sharpens the display and can help, but it cannot invent detail the detector did not capture.
Sensitivity, range and accuracy
Thermal sensitivity (NETD) is the smallest temperature difference the camera can distinguish; lower is better, and under about 70 mK is good for building surveys. Temperature range matters less for houses than for electrical and mechanical work. Accuracy is typically quoted as ±2 to ±3 °C or a percentage, and the manufacturer usually states the ambient and scene conditions under which that figure holds; read the small print.
Emissivity
Shiny surfaces reflect infrared rather than emitting it, so a bare copper bus bar or a stainless kettle reads far too cold. Cameras have an emissivity setting; leave it near 0.95 for painted walls, wood and skin, and be sceptical of readings from metal, glass and glossy surfaces unless you have adjusted it.
Standalone or smartphone
Phone attachments cost less for the same detector because the phone supplies the screen and storage. Standalone cameras have bigger batteries, survive drops and dust, and do not stop when you get a phone call. For a home you inspect once a year, the attachment is the sensible buy; for anything approaching regular work, a standalone.
How to scan a house
- Wait for a 10 °C or greater indoor-outdoor difference.
- Set the palette to one with an obvious hot-cold contrast (ironbow or rainbow) and lock the span so colors mean the same thing from room to room.
- Scan walls, ceilings and around windows and doors from about 2 m.
- Photograph anything unusual with both thermal and visual images.
- Confirm suspected moisture with a moisture meter before cutting anything.
What to avoid
- Buying on the upscaled resolution figure.
- Cameras with no stated accuracy or NETD.
- Assuming a cold spot is moisture without a second measurement.
- Pointing a low-cost camera at live electrical gear and treating the number as exact.
How We Research
Cameras were compared on manufacturer specifications: native detector resolution, stated accuracy and ambient conditions for that accuracy, temperature range, field of view, refresh rate, battery and reporting workflow. Owner feedback was read for recurring faults such as app connection problems and battery failures. We did not perform imaging tests and publish no measurements of our own.
Affiliate disclosure: Akermin earns a commission from qualifying Amazon purchases made through links on this page. This does not affect our picks, which are based on documented specifications and owner feedback. Learn more.