The MKS HPS® Series 999 Quattro™ is the ultimate transducer solution, providing pressure measurement from 10^-10 Torr to atmosphere, combined with atmospheric switching capabilities. The Quattro combines three of HPS' key technologies into an integrated gauge solution, and has the functionality of four sensors in one compact package. The Quattro includes the miniaturized hot cathode ionization sensor, the MEMS-based MicroPirani™ sensor and a unique piezo sensor, offering both differential and absolute sensor functions. Customers requiring both a power supply and display can use the 999 with the PDR900 Series Controller sold on this website. For Complete Specs and Operation Information see the DOWNLOADS section.