Alternative lid assembly for 24 hour recording

Two versions of this head assembly are available: one for the Seven-day recording volumetric spore trap and the other for the Recording air sampler. Both versions enable the equipment to record onto a standard glass slide over a 24-hour period if additional detail is required, instead of the normal 7-day period. The performance of the heads and their throughput, is otherwise identical.
Seven-day recording volumetric spore trap >>		Recording air sampler >>