We want to handle the materials such as PCB & MSD components as per IPC 1601 & J-STD-033. As such, we need a baking oven to perform this and to monitor (temperature – we have to maintain up to 200’C & humidity – below 5%)the control environment & maintain with data logger. We face more and more issues on this subject. I hope, you will be able to provide with us support. also I want to know this below 5% Humidity needs to maintain in the oven?

A baking oven over 100 C will be at zero humidity. Do you really need to store pcbs/devices at 200 C...this will surely harm some products ? IPC 33B01 allows storage of MSDs in a dry cabinet at less then 5%.....these can operate at room temp or 40 / 60 C. A company called TOTECH has lots of info about dry cabinets and storing devices in line with the IPC spec. You should speak to them.

In an oven over 100 C any moisture will escape through vents. There will not be huge volumes of moisture in the oven when you are baking components so it should easily escape through vents / holes in the system leaving you with a humidity of near zero %. At below 100 C, there will be some humidity in the oven, but I do not know how you can control it to a set level. Totech dry cabinets will control the humidity down as low as 0.5% RH at room temperature.