The 900DP is the ultimate in convenience. This meter includes all of the 900DB features plus it comes with a pulser and intrinsically safe barrier. It also has a backlit display for easier viewing in poor lighting and an AC power with battery backup. The 900DP meter is approved for gasoline, diesel, kerosene, mineral spirits, Stoddard solvents, and heptanes. Nutating disc technology for accurate metering and dependability with fewer moving parts. Wide power input range: 12 to 40 VDC; .2A and 90 to 240 VAC, and 50 to 60 Hz. 10:1 pulse output for gallons, liters and quarts. 1" inlet and outlet.