Been doing a lot of investigation work across the Pennines this year, and I've invested in a couple of different thermal imaging devices. Thought I'd do a proper breakdown for anyone considering getting into this side of things.
Flir One Pro (£300): Brilliant image quality, connects to your mobile, shows temperature readings down to the decimal place. Battery lasts about 45 minutes. I've used it at Pendle Hill and it's picked up temperature anomalies in old stone buildings that were genuinely interesting. The software is a bit fiddly though, and you need a decent smartphone.
Etekcity Lasergrip (£45): Cheap as chips, handheld, no frills. Won't give you fancy imagery, but the temperature readings are reliable. I've used this for basic spot-checks and it's never let me down. Great if you're on a budget and just want confirmation of cold spots.
Honestly? For casual ghost hunting with a mate, the Etekcity is probably enough. For serious work, the Flir is worth the investment. But neither will help you if you don't know what you're actually looking for.
