Ace instruments manufactures digital pirani gauges [model dhpg-210] for measuring high vacuum in the pirani range up to 0.001 mbar. These instruments are panel mounted with a pirani gauge head [sensor], which can be clamped onto the point of measurement using a kf clamp fitting. Models are available for vacuum measurement from 999 mbar [atmospheric] to 0.001 mbar [1 micron] and from 1 mbar to 0.001 mbar [1 micron] depending on the application. The display is an intelligent 3-digit 7-segment led display with auto decimal resolution setting. All pirani gauges are based on the principle Of measurement of thermal conductivity of gases. The digital pirani gauges come with a single gauge head or a dual gauge head enabling the use of one instrument to measure the vacuum of 2 points. The digital pirani gauge is a Direct replacement for the conventional analogue pirani gauges and are mains operated on single phase, 230 v ac supply.