Table 3.

${}^{222}$Rn emanation rates of four noble gas purifiers from the company SAES. PS4-MT50-R535 is identical to PS4-MT50-R2, but received a new commercial label

ID	Model	Mass of active material	Cold state activity [mBq]	Hot state activity [mBq]	Used in XENON1T
#16	MonoTorr PS4-MT50-R2	$\sim 4$ kg	$0.61\pm 0.04$	$1.17\pm 0.15$	Yes
#17	MonoTorr PS4-MT50-R535	$\sim 4$ kg	–	$0.24\pm 0.03$	Yes
#18	MonoTorr PS4-MT3-R2	$\sim 0.5$ kg	$0.09\pm 0.03$	$0.09\pm 0.03$	No
#19	MonoTorr PS3-MT3-R2	$\sim 0.5$ kg	–	$\le$0.015	No