Thermal cameras come in two common forms: a standalone handheld, or a small module that plugs into your phone. Both can find the same problems. The right choice depends on how often you will use it and where.
Phone-attachment cameras
Strengths
- Lower cost, because you borrow your phone's screen, battery and storage.
- Pocket-sized and easy to keep in a toolbag or glovebox.
- Photos and video land straight on your phone, ready to share.
Trade-offs
- You need your phone free, charged and running the app.
- The camera draws power from the phone.
- Some are more exposed to knocks than a purpose-built body.
- Connector matters. Check whether your phone uses USB-C or Lightning before you buy. iPhones before the iPhone 15 use Lightning.
Examples: TOPDON TC001 Max, Thermal Master P2 for USB-C, and MILESEEY TR256i for iPhone and iPad.
Handheld cameras
Strengths
- Always ready: pick it up, power on, scan.
- Own screen, battery and storage, so your phone stays free.
- Built for jobsite use, with some models carrying dust and water protection ratings.
Trade-offs
- Higher price for the same sensor resolution.
- Bulkier to carry.
- Sharing images usually means transferring files or using a companion app.
Examples: MILESEEY TR20 and UNI-T UTi260B.
A simple way to decide
- A few times a year, around the house: phone attachment.
- Weekly use or paid work: handheld.
- Not sure: start with the resolution you need (see resolution explained), then choose the form that fits your routine.
Browse handheld and phone models, or read the full buyer's guide.