HQd meters and probes
are made for water
pH • BOD • Conductivity • DO • ORP • Sodium
Ammonia • Ammonium • Fluoride • Chloride
It's Your Job to Be Accurate.
It's Ours to Make It Easier.
The DR 3900™ Spectrophotometer. An even simpler way to prevent measurement errors.
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Process pH/ORP Sensors
Unsurpassed accuracy and reliability for less downtime and maintenance. See all our ph/ORP Sensors!
Spend $500,
get 5,000 P3 Points!
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pH Buffers
See our selection of pH Buffers
including single-use, bottled solution, and powder pillows.










