A system, comprising: (a) a sterilizing cabinet comprising a sterilizing chamber and a user interface; (b) a biological indicator analyzer comprising at least one biological indicator receiver; and characterised by (c) a variable resistance biological indicator (700, 1200) comprising: (i) a set of readable indicators (1220, 1224, 1228, 1218, 1222, 1226), the set of readable indicators comprising a first readable indicator and a second readable indicator, (ii) an indicator window (1214, 1216), and (iii) an adjustable portion operable to selectively move between selected vent positions from a set of vent positions, the set of vent positions comprising a first vent position and a second vent position, wherein each readable indicator of the set of readable indicators is associated with a corresponding vent position of the set of vent positions, wherein the adjustable portion is configured to position first readable indicator in the indicator window (1214, 1216) when the adjustable portion is in the first vent position; wherein the biological indicator analyzer is configured to detect one or more microorganisms in the biological indicator (700, 1200); wherein the sterilizing cabinet is configured to execute instructions to verify, based upon the first readable indicator, that the first vent position is compatible with a selected sterilization cycle before the selected sterilization cycle begins. (a) a sterilizing cabinet comprising a sterilizing chamber and a user interface; (b) a biological indicator analyzer comprising at least one biological indicator receiver; and characterised by (c) a variable resistance biological indicator (700, 1200) comprising: (i) a set of readable indicators (1220, 1224, 1228, 1218, 1222, 1226), the set of readable indicators comprising a first readable indicator and a second readable indicator, (ii) an indicator window (1214, 1216), and (iii) an adjustable portion operable to selectively move between selected vent positions from a set of vent positions, the set of vent positions comprising a first vent position and a second vent position, wherein each readable indicator of the set of readable indicators is associated with a corresponding vent position of the set of vent positions, (i) a set of readable indicators (1220, 1224, 1228, 1218, 1222, 1226), the set of readable indicators comprising a first readable indicator and a second readable indicator, (ii) an indicator window (1214, 1216), and (iii) an adjustable portion operable to selectively move between selected vent positions from a set of vent positions, the set of vent positions comprising a first vent position and a second vent position, wherein each readable indicator of the set of readable indicators is associated with a corresponding vent position of the set of vent positions, wherein the adjustable portion is configured to position first readable indicator in the indicator window (1214, 1216) when the adjustable portion is in the first vent position; wherein the biological indicator analyzer is configured to detect one or more microorganisms in the biological indicator (700, 1200); wherein the sterilizing cabinet is configured to execute instructions to verify, based upon the first readable indicator, that the first vent position is compatible with a selected sterilization cycle before the selected sterilization cycle begins.