We have some tanks of butyl acrylate and methyl methacrylate monomers, and the level indicators are giving incorrect readings. The control systems engineer who set up that system suspects that the density values used in programming the level indicators were wrong, so I measured the density of the monomers by hand today. However, the monomer samples I had were at around 70-72 Fahrenheit, whereas the tanks are usually closer to 52 Fahrenheit. I'm trying to find the volumetric thermal expansion coefficients for these liquids so I can correct my measurements, but I'm unable to find them. I've checked online and in the CRC Handbook of Chemistry and Physics (which lists coefficients for some organics, but not these).
I know that the expansion coefficients are temperature dependent, but if I can get even a single value (at, say, 20 Celsius, which seems to be a fairly standard place to measure this for organics) I should be able to get my estimate close enough to be able to judge if this is the source of error in the level indicators or not.