The YSI Pro1030 is a durable and dependable handheld instrument that provides comprehensive measurement capabilities for pH, ORP, temperature, conductivity, specific conductance, salinity, and total dissolved solids (TDS). Its user-friendly design includes replaceable sensors (for pH and ORP), versatile cables, and a convenient calibration routine. With its rugged construction, military-grade connectors, waterproof design, and 1-meter drop resistance, this instrument is built to withstand even the toughest environments. The Pro1030 features a super-stable 4-electrode conductivity cell that is built into the cable and requires minimal maintenance.