... Windbell Automatic tank gauges SP300 RS485, DC12V, 0.5mm accuracy, measuring height 4.5m, 2'' oil floater kits, IP67 protect Windbell Automatic Tank Gauges ATGs SP300 ... the high quality in application for underground tank measurement.Features:Use for gasoline, diesel and ... Tank diameterH1- height of manholeH2- height of riser pipePCR (PC Remote management software) is specially designed by Windbell ...