Organic Membranes for Selectivity Enhancement of Metal Oxide Gas Sensors

Table 4

Changes in the absolute humidity in the permeate when using polyolefin membranes made of LDPE, HDPE, PE + graphite, PP, and PMP. The concentrations in the feed and permeate are measured with a digital /RH sensor (HYT221).

Membran	Sensor	[g/m^3]	[g/m^3]	[g/m^3]	[g/m^3]
PE-LD	HYT221	4,8	9,4	0,7	1,4
PE-HD	HYT221	4,9	9,6	0,2	0,5
PE + C	HYT221	5,1	10	0	0,2
PP	HYT221	4,8	9,5	0,2	0,2
PMP	HYT221	4,8	9,8	0,8	1,7