I have a whole bunch of seeds that I want to start planting. From tropicals to produce.

I'm on the lookout for a good digital thermometer that I can take the readings of the soil temperature.
I have a heat mat and some small seedling greenhouses but want to make sure I'm not over heating (cooking) my seedlings.
I've looked all around and can't seem to find one just for what I want it for.
Any ideas of where I could get one?
Thank you

I only use natural lights from my south facing window when growing plants from seeds. I didn't plant any seeds this winter.

Lucky, I have never bothered with soil thermometers. I can feel my heating pads and tell how hot they get. Anyway, have you considered using a meat thermometer and just sticking that metal end into the soil for a few minutes? I have no clue whether than would work or not.

I've see a few on you tube that people are using. I was just curious cause I have some tropical seeds that say keep the soil at 70 - 80 degrees during germination.