Have you thought about looking at a different type of inlet duct. Donaldson makes a duct that that has external filters that can be changed on the fly.
IF you use a thermostat with a dry set of conatacts you can get a way with a Digital input. If you use a thermocouple or an RTD you will need an analog input.
All the gas turbine manufactures have this data. Check the GE, ABB, Westinghouse, Solar, and Rolls Royce. If you can't find it on the web site I'm sure they can fax\email\snailmail what you are looking for. This technology is constantly changing fo reach manufacturer.
mike
The marine gas turbine is the exact same turbine as the land base. I have seen idustrial gas turbines on Chevron takers and areo's on fast attack ships and crusers. So if you find gas turbine information on the make and model you are intrested in it will be valid.