Amprobe MANO2-A Differential Pressure Manometer<div style="text-align: left;"><strong>[Product Information]</strong><br><ul><li>Measures gauge or differential pressure up to 2 pounds per square inch (psi) in heating， ventilation， and air-conditioning (HVAC) applications and in devices with valves and pneumatic controls， such as medical equipment</li><li>Choice of five units of measurement</li><li>Hold function keeps a reading on display， even after meter is disconnected or pressure measurement changes</li><li>Record function stores the maximum and minimum readings in each session to track sudden increases and decreases in pressure</li><li>Clock keeps track of the time of measurement events so that pressure measurements can be analyzed in relation to other concurrent events， and pressure fluctuation patterns can be spotted</li></ul></div><img src="http://ecx.images-amazon.com/images/I/413hvb9EwNL.jpg" noproxy><img src="http://ecx.images-amazon.com/images/I/41p%2BsDoaK4L.jpg" noproxy>