5pcs Pack High Accuracy K Type Mini-Connector Thermocouple Temperature Probe Sensor, 1 Meter Long Measure Range -200°C~260°C (-328°F~500°F)

My only complaint about these is how they're packaged. All five of them are coiled up together, and separating them is a bit of a mess. I'd have really appreciated if each had been individually tied up.Otherwise, I've found they're all perfectly accurate. The build quality is also quite good, too. These were built with nicer plugs than cheaper thermocouples. The plastics are nicer, with good molding and even a small place to label them. The terminals inside are also easy to wire and re-wire. I have a piece of equipment that takes bare wires instead of having a socket, so this is important to me. Other thermocouples I've bought have had really really cheap plugs on them with self-tappers and that are a pain to work with. This is a huge bonus, and I imagine where a lot of the cost is going.The wire itself is very thin, which makes threading these into tight spaces easy. It also keeps shape when you bend it pretty well. There isn't an excess amount of exposed wire at the bead/junction end like some cheaper ones. Very good.Overall, these are expensive, but it's for a reason. While the accuracy gains aren't huge, you're getting something that's just nicer to use. The cable is thin and feels high-quality, while the plugs used are excellent. It's up to you if that extra cost is worth it, but it would be to me.

I don't have any professional testing equipment. However these probes do seem to be consistent and accurate. If placed in a container of crushed ice with a little water, I get a reading around 0C with all of them. If placed in boiling water, I get a reading around 100C with all of them.

I tested these cables over a range from -55C to +70C.Within this range, the accuracy is +/- 3 degrees Celsius