Dwyer Instruments BPI-101:

Compact, portable, and easy-to-use digital pressure indicator
Measures pressure, vacuum, and differential pressure
Wide measurement range (-14.5 to 30 psi)
High accuracy (±0.25% of full scale)
Large, backlit LCD display for clear readings
Multiple engineering units for versatility
Min/max/average recording function for data analysis
Rugged construction for durability in harsh environments