1. Adopting PLC control and automatically starting sampling program through time setting.
2. The 2701 has a stainless steel protective body, and is both water proof and dust proof. It is also equipped with a ﬁlter kit, allowing for operations in all but extreme weather conditions.
3. The unit’s modular design allows it to be combined with various sampling media, including cartridges, Summa canisters, and Tedlar bags.
4. Silanized paths minimize the carryover and contamination.
5. The 2701 uses capillary current limiter, which reduces the probability of blockage compared with oriﬁce plate current limiter.