[hippari]

The Wet Bulb temp can use any scale they see fit, it's a derived unit. It's even better if they don't use F and C to avoid confusion.

[Leftium]

> The wet-bulb temperature (WBT) is the temperature read by a thermometer covered in water-soaked cloth (wet-bulb thermometer) over which air is passed

It seems to be a direct measurement, not derived from anything. You might be able to derive WBT given the dew point and dry bulb temperature, but it would still need units like C or F.

Perhaps you were thinking of a different measurement?

[hippari]

I believe that's a shortcut to measure WBT directly. By it's nature, WBT are affected by other variables such as humidity and atm pressure, etc... , so it's a derived unit: Twb = F(T, H, P...). As a derived function, you tweak its scale as much as you like, you can take T = C*2 and that solved your problem.