A variant of these devices can approximate measurements using the Sakuma-Hattori equations with the measured signal ratio of emissivity. Regnault (-5[1])(“rain-YO”) is often cited as creating the “constant-volume” variant of these devices which can (15[1])be constructed with (-5[1])a u-tube. The measurements of the empirical type of these devices must have a strictly monotonic relationship with the absolute types (-5[1])of these devices. Remote sensing variants (15[1]-5[1])of these devices that use an (15[1])object's (*) emitted radiation (10[1])are known (10[1])as (-5[1])pyrometers. (10[1])One interpretation of the zeroth (-5[1])law of (10[1])thermodynamics (10[2]-5[1])is that (10[1])if two of (10[1])these devices (10[1])have the same (10[1])reading (10[1]-5[1])as a third (10[1])when touching, (10[4])they (10[1])will have the same reading (10[1])when touching each (-5[1])other. (10[2])For 10 points, (10[1])name these (10[1])devices (10[1])which (10[1])measure temperature. (10[4])■END■ (10[12])