Testing Supplies
Product Categories
« Back to Store
Air Blowers
Chemical Feeders
Chemicals
Filtration
Maintenance Supplies
Automatic Pool Vacuums
Mechanical & Plumbing
Pool & Spa Lighting
Pumps & Motors
Heaters
Safety Equipment & Supplies
Chemical Controllers & Automation
Testing Supplies
Spa & Sauna Accessories
Covers & Reels
Pool Winterizing
Lifeguard Chairs
Diving Stands & Boards
Starting Platforms
Racing Lanes & Pace Clocks
Basketball, Volleyball & Play Features
Ultraviolet (UV) Light Systems
Pool Fencing
Hanna pH/ORP/Temperature Combo Tester
The HI98121 is a reliable, waterproof tester that ensures quick and easy measurements of both pH and ORP. This accurate pH and ORP tester features 0.01 pH resolution with automatic two-point calibration and temperature compensation in a single, portable, pocket device. No more switching between meters for your routine measurements.
- ±0.05 pH/ ±2 mV Accuracy
- Replaceable pH Electrode
- Great for pools, sanitizers, wastewater, & industrial
