Designed for your water quality applications measuring simultaneously Dissolved Oxygen (DO) and Conductivity/TDS, the Hach HQ40D portable multi meter is a two channels advanced handheld digital meter that takes the guesswork out of measurements. The Hach HQD digital multimeter combines reliability, flexibility and ease of use. The HQD portable meters connect with a wide range of Intellical smart electrodes addressing different parameters, sample types and operating environment for water quality, environmental and treatment process purposes. The Intellical probe automatically recognize the testing parameter, store the calibration history, and method settings to minimize errors and setup time.

Intellical™ LDO101 and CDC401 are digital luminescent/optical dissolved oxygen (LDO) probe and Conductivity/TDS cell. The LDO101 is fitted with an automatic pressure sensor module and a temperature sensor. The DO sensing cap comes with an iButton to track days in use and remind remaining life of the sensing cap element.The LDO101 and CDC401 are ideal for measuring dissolved oxygen and Conductivity/TDS/Salinity/Resistivity in wastewater, drinking water and general water quality applications