This pressure gauge measures two pressures at once using dual connections. It replaces two gauges, saving space—ideal for railways where you monitor both air tank and brake cylinder pressure with one unit. Two clear pointers let you compare readings quickly and easily. To maintain accuracy, use up to 75% of the scale for constant pressure, and 66% for fluctuating pressure. Choose wetted parts that match the fluid. For details, see JIS B 7505-1.