5pcs 3M K Type Mini-Connector Thermocouple Temperature Probe Sensor Measure Range -40~350°C

Longer than my factory one, so far no issues and I don’t see any in the near future.

Maybe I am just lucky, but all 5 of my probed work great. 0 degC in ice water thermos and 100 degC in boiling water. It should be noted that temp reading accuracy is only as good as the cold junction temperature compensating system of the meter. Temp meters typically use an internal thermistor to accomplish this, so temp error is the error of this internal thermistor temp reading plus any error of the thermocouple itself. Low cost meters do not read the internal thermistor very accurately, leading to temp reading errors of 6 deg F or more. Also it is very important to let the temp meter sit at a fixed room temp for at least 20 min before using it to allow the internal temp of the meter to stabilize. If you suddenly take the meter outside where it is hot or cold you will initially see huge errors in temperature readings with the thermocouple held at a fixed temp (such as in ice water).

Nice, low cost, work well. Tips are bare wires which is good and bad, good for fast response, bad for damage and contamination. But you could buy others that have metal sheaths. I put them on my heat pump furnace refrigerant lines, cold air return, and outside to monitor performance so I know if refrigerant is getting low. Hooked up to a 4 point meter.

I recieved these probes and when I went to use them, the first one fell apart. Wires in plug where not tightened under the screws and pulled out of plug. Had to do a jobsite fix (simple) and fasten the probe wires under the screw. The sheath cover over the 2 wires is poor in one spot. This was on 1 of the 5 probes I recieved. Otherwise they seem to be accurated and equal temperature readings between them. Not sorry I bought them.

Priced right when compared to purchasing similar items from HVAC supply house. Normally I pay the same amount for 1 item.