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 of these devices. Remote sensing variants of these devices that use an object's (*) emitted radiation are known (10[1])as pyrometers. (10[1])One interpretation of the zeroth law of thermodynamics is that if two of these devices have the same reading as a third when touching, they will have the same reading (10[1])when touching each other. For 10 points, name these devices which measure temperature. ■END■