The Infiltec Model DM1 micro-manometer is a portable digital micro-manometer with the easy-to-use 0.001 inch water column or 0.1 Pascal digital resolution units that can solve your toughest differential pressure measurement problems. Applications include HVAC test and balance, radon mitigation, furnace draft analysis, duct leakage testing, pressure balancing, combustion safety analysis, advanced building diagnostics, laboratory safety monitoring, clean room monitoring, isolation room monitoring, process monitoring, filter condition checks, environmental assessments, and Pitot or orifice pressure measurements. Comes in padded carrying case with 9v battery, extension tubing, manual, and calibration certificate.