Microcontroller Based Automated Head Space Auto Sampler has built in memory to store 50 different methods. The Auto Sampler is fitted with circular sample holder for 20mL crimped vials. The Head Space Auto Sampler is a microcontroller based unit that starts data station automatically. Microcontroller Based Automated Head Space Auto Sampler can be programmed for a single cycle operation of 10 samples or replaceable 99 samples.