Product - ORP HQd Meters and IntelliCAL™ Probes
HQd Configurator

HQd Configurator
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
ORP Meters & Probes
Oxidation Reduction Potential
Only Hach offers a digital rugged ORP probe with a flat disk design to make sensor cleaning a breeze and to ensure optimal performance. Use IntelliCAL™ ORP for general treatment, process control, nitrification/denitrification process (with the LDO probe), and disinfection control.
See below for individual meters and probes or see our Kits which include everything you need to start testing!
HQd Meters for ORP
Laboratory
- HQ440d Benchtop
- - Dual Input
- - Multi-Parameter - pH, Conductivity, Dissolved Oxygen, ORP, and ISE
- HQ430d Benchtop
- - Single Input
- - Multi-Parameter - pH, Conductivity, Dissolved Oxygen, ORP, and ISE
Portable
- HQ40d Portable
- - Dual Input
- - Multi-Parameter - pH, Conductivity, Dissolved Oxygen, ORP, and ISE
- HQ30d Portable
- - Single Input
- - Multi-Parameter - pH, Conductivity, Dissolved Oxygen, ORP, and ISE
IntelliCAL ORP Probes
Rugged ORP Probes
Designed for harsh environments. Features a super-tough, stainless steel body and polymer shroud that protects the sensor from impact. Flat disc sensor design is easy to clean. Reinforced, steel-sheathed cables are durable, yet manageable. Waterproof for 24 hours at a depth of 30 meters.
Refillable ORP Probes
Liquid-filled ORP probe also measures temperature. Non-submersible.
Standard ORP Probes
Liquid-filled pH probe also measures temperature. Non-submersible.

