Yes; I'm pretty sure they are Heater and Temperature probes.
How come? Well, they get mentioned here
... which appears to be a patent application for the RT-100
... and it's a pity that the figure illustrations mentioned are nowhere to be found.
The plot thickens!
Old equipment:- yes, as we know, it is not uncommon for successful "pioneering" companies (such as Timeter, Metron, Bio-Tek et al
... and there are many others) to be bought up by the Big Corporate Players. The support of "legacy" equipment then almost always gets forgotten about, or (at best) left to gently wither on the vine.
For instance ... are we ever likely to see a RespiCal II (T-400) - complete with USB and what-have-you fit for the modern age? Somehow I doubt it.
But the Rigel VenTest 800 (IMT PF-300) looks nice.This happens in all industries. Take, for example, Saab cars ... "Saab the Innovator" (and they were) becomes "Saab the Cavalier Clone" (or, if you like, the Cadillac BLS) ... and then binned altogether.