The heated Inletfilter model number 1035 is made for filtering the particles from a size of 5μ and bigger out of the samplegas. The Operation time of an Testa-FID without a build in filter (Model 123) can lengthened several times, because this fine filter helps to minimize the change of the sample capillary, the cleaning of the pump and minimize the maintenance. All the spikes you can see without filter are eliminated with our model 1035.