A variant of these devices can approximate measurements using the Sakuma-Hattori equations with the measured signal ratio of emissivity. Regnault (“rain-YO”) is often cited as creating the “constant-volume” variant of these devices which can be constructed with 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 (-5[1])of these devices that use an (15[1])object's (*) emitted radiation are known as pyrometers. One interpretation of the zeroth law of (10[1])thermodynamics is that (10[1])if two of these devices have the same reading as a third when touching, (10[2])they (10[1])will have the same reading when touching each (-5[1])other. For 10 points, name these devices which measure temperature. ■END■ (10[3])