Hach Advanced digital HQd portable meters is highly accurate measurements and exceptional reporting capabilities in a rugged IP67-rated waterproof housing. The intuitive user interface with guided calibration and measurement routines simplifies operation. These multiparameter meters measure pH, ORP, ISE, conductivity, salinity, TDS, temperature, and dissolved oxygen or BOD using LDO technology. Your water analysis test will be more easier with this tool. The HQDBOD system combines the HQ40d Digital Multi-Parameter Meter, the new LBOD101 IntelliCAL Probe, a meter stand, and power and USB cables for laboratory use. The HQ40d Digital Multi-Parameter Meter offers true Plug and Play operation with IntelliCAL pH, conductivity, and dissolved oxygen (LDO) probes. Plug in any two IntelliCAL probes and get simultaneous measurement, simultaneous readout! HACH HQ40D is Designed for your water applications, the Hach HQ40d portable meter with pH probe is an advanced meter that takes the guesswork out of measurements. HQd™ meters connect with IntelliCAL™ probes that automatically recognize the testing parameter, calibration history, and method settings to minimize errors and setup time.