chemical thermometer

chemical thermometer

[′kem·i·kəl thər′mäm·əd·ər]
(engineering)
A filled-system temperature-measurement device in which gas or liquid enclosed within the device responds to heat by a volume change (rising or falling of mercury column) or by a pressure change (opening or closing of spiral coil).
References in periodicals archive ?
Because stars are much hotter, Najita's team could apply a kind of chemical thermometer to tell them apart.
Full browser ?