Lutron PM-9100HA

Dual & differential input: 2000 mbar max. range
Single lugs for pipe connection.
8 display units ( mbar, psi, Kg/cm 2 mm Hg, inch Hg, meter HF2 , inch HF2 , Atmosphere )
Auto shut-off saves battery life
Zero button on the front panel: to easily offset the zero value
Large LCD display with contrast adjustment for best viewing angle
Records maximum & and minimum readings with recall
Can hold the desired value on the display
Low battery indicator.
Sensor: Inbuilt inside the housing, piezoelectric sensor, used for dry, non-corrosive, and non-iconic air and gas only, Liquid is prohibited
Display 61 mm x 34 mm super large LCD display. 15 mm ( 0.6" ) digit size.
Sampling time Approx. 0.8 second.
Power supply 006P DC 9V battery(heavy duty