Features: Easy to read 6 digit LCD, up to 4 decimal positions Battery operated (2 AAA batteries included) 3 model variations RB - Rate Only TB - Total Only RT Rate & Totalizer Total reset function can be disabled Display update time: Rate 1.5 sec., Total 0.5 sec Factory calibrated - nothing to program Weather resistant ABS enclosure. NEMA 4X LCD is not recommend for direct sunlight applications Select Size and Pipe Type Above SCH 40 Models RB-150S4-GPM1 - 1-1/2” 15 to 150, Sch. 40 RB-200S4-GPM1 - 2” 30 to 300, Sch. 40 RB-300S4-GPM1 - 3” 60 to 600, Sch. 40 RB-400S4-GPM1 - 4” 100 to 1000, Sch. 40 RB-600S4-GPM1 - 6” 250 to 2500, Sch. 40 SCH 80 Models RB-150S8-GPM1 - 1-1/2” 15 to 150, Sch. 80 RB-200S8-GPM1 - 2” 30 to 300, Sch. 80 RB-300S8-GPM1 - 3” 60 to 600, Sch. 80 RB-400S8-GPM1 - 4” 100 to 1000, Sch. 80 RB-600S8-GPM1 - 6” 250 to 2500, Sch. 80