CPS VG200: Vacuum Gauge with Digital LCD Display ACCURATE - Calibrated to strict NIST standards for best-in-class accuracy and reliability. SMART DESIGN - Advanced sensor design with self-heated thermistor bridge and automatic temperature compensation. SIMPLE TO CLEAN - Field cleanable sensor designed to withstand 400 Psi of positive pressure. EASY TO READ - Continual digital readout of evacuation process on large, easy to read 5-digit LCD display. USER SELECTABLE UNITS - Choose between microns, torr, in/hg or mBar.