General Tools DM8215 Deluxe Digital Manometer， 0-15 psi<div style="text-align: left;"><strong>[Product Information]</strong><br><ul><li>Digital display of gauge or differential pressure</li><li>Display unit options are psi， inH₂O， bar， mmHg， ozin， kgcm， kPa， ftH₂O， inHg， cmH₂O and mbar</li><li>Minimum/Maximum memory and data hold</li><li>RS-232 output jack; optional PC data logging kit includes RS-232 to USB adaptor</li><li>Auto Power Off; can be disabled for data logging</li></ul></div><img src="http://ecx.images-amazon.com/images/I/41BE6J4NNZL.jpg" noproxy>