The improved electronics within the VisiFerm RS485 allows users to see up to 50% more sensor lifespan. Due to the flexibility in choice of ODO cap, users may also be able to see up to three times longer cap life when using the H3 or H4 ODO caps due to an enhanced luminophore. When both the VisiFerm RS485 and either the H3 or H4 caps are used together, users experience the dual benefit of the more robust electronics and enhanced luminophore creating a higher performing sensor.