We use the FDC Barrier filter on our 206's.
http://www.fdcaerofilter.com
There is no electrical purge just a Bypass door if the filter becomes clogged.
If you fly in harsh conditions it may pay to clean your filters every 50 hours or even 25 hours in extreme conditions.
The kit is easily fitted in around one day and you should get a TOT decrease of about 20-30 degrees.
We fitted an new compressor a while back and there is no erosion evident during case half inspections, even after around 1200hrs ops with regular beach landings.
Great investment I think, much better option than the original particle seps.