Ok, I am OUT of BLACK thermometers.
I still have white ones available. I noticed a feature on the white ones that I overlooked before. They measure both tank temperature and room temperature. You can switch to IN tank temperature, and OUT of tank temperature by pressing the PWR button...
Have some digital thermometers from this years group purchase.
Measure in degrees F and C
Has an in tank probe w/suction cup.
Battery is included.
3ft wire & probe
$6.00 shipped in the US.
$7.00 shipped outside US.
Or you can have 10 for $50 shipped.
I will also trade a bunch...