The Pirani gauge measures from atmosphere (760 Torr) to 10-3 Torr, while the convection-enhanced gauge measures from 1,000 Torr to 10-3.
Both gauges are made from UHV compatible materials, and are available as transducers or sensors with controllers. The convection-enhanced Pirani is available in a CE marked model.
HPS, 5330 Sterling Drive, Boulder, CO 80301. Tel: 303-449-9861; Fax: 303-442-6880.