Hach gives portable measurement flexibility and ease of operation with its HQd meter and full suite of interchangeable IntelliCAL™ lab and field probes, including 12 probe types in 6 different parameters. When switching between parameters on the HQd meter, the operator simply plugs the probe into the meter. The system does the rest, automatically recognizing the testing parameter and recalling the calibration history, which unlike competitor models, is stored in the probe. Operating the HQd requires little to no training due to its intuitive menu structure and guided measurement and calibration methods.