These are fine for what it seems like you’re wanting to measure UNI-T UT383 https://smile.amazon.com/dp/B098SXQB2T/ anything with that little white ball looking sensor area is probably decent. The Extech ones are probably the cheapest that you can get that are able to be fully calibrated. I’ve used a couple of the cheap ones and compared to calibrated ones for work and they were very close.