NEW! The luminescent dissolved oxygen method utilizing the technology Hach pioneered in 2003 is now fully EPA approved. Hach's LDO process and lab probes, as well as BOD tests conducted with Hach's HQd meter platform can now be used for reporting purposes when following this newly approved method.
Download Method 10360 (PDF) 
Final 2012 EPA Methods Update Rule (MUR)
Hach now has the option of creating your own HQd system to suit your specific testing needs. Choose from options including benchtop or portable, power supply, testing parameter and more!
Build your own HQd System
The breakthrough Hach Luminescent Dissolved Oxygen (LDO) technology, now the standard for measuring Dissolved Oxygen, eliminates the numerous reliability and maintenance concerns inherent in older DO membrane instruments.
See below for individual meters and probes or see our kits that include everything you need to start testing!
Designed for harsh environments. Features a super-tough, stainless steel body and polymer shroud that protects the sensor from impact. Reinforced, steel-sheathed cables are durable, yet manageable. Waterproof for 24 hours at a depth of 30 meters.
lso measures temperature. Waterproof for up to 24 hours at a depth of three meters.
