Best EMF meters under £150 - what's actually worth buying?

Been doing some basic investigation work around an old coaching inn in Yorkshire and I'm finding that my old £20 Amazon EMF meter is basically useless - goes off when I'm standing next to a laptop, doesn't register anything substantial otherwise. I know EMF readings aren't proof of anything on their own, but I'd like something more reliable for ruling out electrical interference.

I've seen people recommending the K2 and the Trifield meter, but they're both pushing £200+. Is there anything decent in the £80-150 range that won't embarrass me in front of proper investigators? Bonus points if it's something you've actually used and can vouch for.

Also, does anyone use thermal imaging cameras instead? I've got an old FLIR unit from work I could potentially borrow...

Honestly, save up for the proper kit. The difference between a cheap EMF meter and a Trifield is night and day - the Trifield actually filters out mains frequency interference, so you're not getting false positives from every light switch in the building. I've done about 40 investigations and I can tell you the cheap meters are worse than useless because they give you bad data that looks scientific.

The Ghost Meter Pro is about £120 and it's decent for the money. Not in the same league as a Trifield, but it's got better filtering than the K2. I've used one for two years and it's been reliable. Fair warning though - most of the time you'll record nothing and that's actually the most honest thing a meter can tell you.

Thermal imaging is brilliant but it's a completely different tool. You're looking for temperature anomalies rather than electromagnetic activity. Both are worth doing, but they measure different things. If you can borrow a FLIR unit, absolutely use it - but don't rely on it to 'prove' anything on its own.

Might be worth asking if your local paranormal group has any kit you could borrow or use with them? A lot of active groups have equipment libraries and honestly it's safer to learn with experienced people rather than just going into an old building with a meter and hoping for the best.

Skip the EMF meter entirely and get a good digital thermometer with a probe. Temperature drops are far more reliable indicators than electromagnetic readings, and they're way cheaper. EMF just picks up every bit of wiring in the building - almost pointless indoors.