Yo wan - I've gone through a lot of stream thermometers over the years. I do not like any kind of liquid filled thermometers because they tend to break if I leave them in a hot car during the summer. So now I get a cheap meat type dial thermometer from Harbor Freight or the Dollar Store for $5 or less. They need to be calibrated, and have a sharp point, but very durable compared to the liquid or battery powered devices.