The Hanna Instruments HI 9033 is a rugged meter designed to hold up under extended use in wet, humid, dusty and muddy conditions. The Hanna Instruments HI9033 Multi-range Conductivity Portable Meter with HI 76302W conductivity probe has the advantage of measuring samples from deionized water to brine without having to switch or recalibrate the probe. + The Hanna Instruments HI 9033 performs measurements with Automatic Temperature Compensation which adjusts for the effects of temperature on the probe. The Hanna Instruments HI 9033 also feature HANNAs BEPS (Battery Error Prevention System) technology that alerts the user when low batteries could affect the readings.