Procam Controls, of Plano, Texas, introduces simpleSDI—the portable, automated SDI (silt density index) measurement tool. Compact, lightweight and battery-powered, the meter makes it easy to perform what many believe is the most important test relative to RO system design and operation. Based on the ASTM D4189-95 standard, it’s more accurate and convenient than manual SDI testing. Microprocessor controlled and factory calibrated, the meter automatically performs five, 10 and 15 minute SDI tests with both 100 mL and 500 mL sample volumes.