The pH/CON 450 meter offers a rugged, waterproof housing, making it ideal for the manufacturing floor, field testing, and the laboratory. Large, backlit LCD lets you view the main measurement simultaneously with temperature. Calibrate pH with up to six points from USA, NIST, DIN, PWB, and custom pH buffer sets. Autocal feature for conductivity has one calibration point per range. ATC ensures measurement accuracy even in fluctuating temperatures.