automatic level measuring instrument 1.Scale:0~20Meter 2.Medium density>0. ... measurement without blind spots, display eye-catching, intuitive readings, measuring range.Products matching upper and lower limit switch output, remote ... ,ABS,UPVC,PVCOptional itemsUP & DOWN Level switches,4~20mA transmissionDrain valve, Top vent valve, drain / exhaust bolts. UHZ (automatic level measuring instrument)