HT10

Comparative pumping speed 4650 ls-1 ISO pumping speed† Nitrogen 3000 ls-1 Helium 4650 ls-1 AVS pumping Nitrogen 3330 ls-1 Helium

HT20B

Comparative pumping speed 18000 ls-1 ISO pumping speed† Nitrogen 8000 ls-1 Helium 16000 ls-1 Maximum throughput (nitrogen) 24 mbar ls-1 18 Torr ls-1