LOW STOCK ALERT: Only 1 left - order now!
In Stock: Order by 2PM EST for same-day shipping (M-F)
This item is in stock in our East Coast warehouse
Dual monitoring of pH and ORP with a large LED display and control of either pH or ORP. Highly accurate.
With the electrodes in place, it can monitor both the pH and ORP readings at all times while controlling either the pH- or ORP-related devices. If one needs only a pH controller, just buy the pH electrode with the controller, and vice versa for the ORP application.
This spec. sheet tells you clearly why the controller is considered to be highly-accurate even to a professional (industrial) standard.
For Freshwater Aquarists - Get the Duo-ORPH Controller and a pH Electrode to control your CO2 System.
For Fish-Only Marine Aquarists - Get the Duo-ORPH Controller and both pH and ORP Electrodes to control your ozonizer and monitor your pH.
For Reef Aquarists - Get the Duo-ORPH Controller and both pH and ORP Electrodes to control your CO2-Ca Reactors and monitor your ORP.
0 to 14 pH
-1999 to 1999 mV Resolution
1 mV Accuracy at 25 C
± (0.01 pH + 1 digit) after calibration
± (1 mV + 1 digit) Impedance
1012 ohms Control Range
3.5 to 10.5 pH
0 to 1000 mV Calibration Knob
External pH 4 (SLOPE) pH 7 (CAL.)
10A for 125V AC 8A for 240V AC Sampling Time
0.5 second Display
0.5" LED, 3-1/2 digits Operating Temperature
32 F to 122 F Operating Humidity
Max. 90% RH Power Supply
AC 110 V, ± 10%, 50/60 Hz Power Consumption
Approx. 2 watts Dimension
5.9" x 3.4" x 1.6" Weight
1.2 lb (incl. power cable) pH Electrode
BNC Connector ORP Electrode
Note: Does not come with probes. Click here to see available probes.
Captive Purity manufactures water filtration and water testing supplies for marine and reef aquaria. The brand is best known for their high-quality line of reverse osmosis filter systems and accessories. Captive Purity also produces refractometers for testing salinity, portable pen-sized meters for testing pH as well as replacement filter media for their RO and RO/DI filter systems.