The Morrison clock gauge displays the liquid level reading of product stored in an aboveground tank. Measures the liquid level up to a maximum of 12 feet in height. Gauge face displays level reading in feet and inches. The hour hand (short hand) displays the number of feet and the minute hand (long hand) accurately displays the number of inches. Standard float fits through a 2″ schedule 40 pipe nipple; drop tube float fits through schedule 40 and schedule 80 pipe nipple.