The HHP91 single or differential-input manometer — for automotive, HVAC, laboratories, or general industrial applications — is compatible with air or noncorrosive and nonionized gases and liquids. The device has eight selectable pressure ranges and displays data on 15-mm-high digits. Functions include auto off, reading hold/min/max, pushbutton recall, and a built-in tilt stand. The unit comes with a built-in sensor with dual inputs for gage or differential measurements.

Omega Engineering Inc., One Omega Dr., Stamford, CT 06907, (203) 359-1660,