PH and Thermometers

7 in 1 PH Meter for Water Digital Water Quality Tester EC/TDS/PH/CF/ORP/Temperature/Humidity Meter with RS485 Communication Module and Removable Electrode for Drinking Water Pool Aquarium

Atlas Scientific Industrial Dissolved Oxygen Probe

Ozone Watering Tester Meter Detector for Ozoned level in Water 110V-240V or Powered by 5 AA Batteries

Atlas Scientific Industrial ORP Oxidation Reduction Potential Probe -2000mV – 2000mV

Portable PH/TDS/EC/TEMP Four-in-one Test Pen Multi-function Water Quality Detector Conductivity With Backlight

Portable PH/TDS/EC/TEMP Four-in-one Tester Pen Multi-function Tester Pen Water Quality Detector Conductivity

ORP-619 Pen-Type ORP/TEMP Meter Water Quality AnalyserThermometer Oxidation Reduction Industry Experiment Analyzer

SG04 Stress Analyzer 4 Channels Analysis Realizes Instrument 4GB Memory SD Card 4000MAH Battery Capacity

PH Meter With Backlight PH-991 Tester Durable Acidimeter Tool Temp Monitor For Aquarium Swim Pool Water

3-in-1 High Accuracy Portable PH/mV/Temp Meter + Replaceable PH & ORP Electrodes + Temperature Probe

Recharable Digital pH Meter 5-in-1 pH/TDS/EC/Salinity/Temp with Simultaneous Data Display for Hydroponics, Aquariums, Lab

Digital PH/Chlorine/ORP/EC/TDS/Salinity/Temp/FAC Pool Water Quality Monitor PH Tester For Swimming Pool Aquarium Hydroponic Spa