The XP-703D-III Sample draw portable detector has been considered by many as the standard in the Semiconductor industry to locate leaking gas cylinders right off the delivery truck.  An upgraded version of the XP-703D, the XP-703D-III provides auto-zeroing, longer battery life and a more compact system that detects most of the main dopant gases used in the Semiconductor industry. Very low level detection limits (down to PPB) and quick response (as little as 10 seconds). This is also a great emergency response unit. For the measurement of very low level detection of Arsine (AsH3), Phosphine (PH3), Diborane (B2H6), Silane (SiH4) and Hydrogen (H2).