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International phone: 1-979-690-5560
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Rugged and reliable pH/ORP analyzers/controllers.
pH analyzers,ORP controllers FEATURES:
  • Measures and controls pH, ORP and temperature
  • Easy to setup and calibrate
  • 5 programmable relays: 2 for pH, 2 for ORP and 1 for temperature
  • Isolated and reversible 4 to 20 mA output for a single parameter
To Order Call 1-800-876-1172
pH/ORP Controllers Options & Prices
On this page:

. pH/ORP Controllers Product Description
. pH/ORP Controllers Specifications
. pH/ORP Controllers Options & Prices

Downloads (PDF):

. pH/ORP Controllers Brochure
. pH/ORP Controllers Manual

Additional Information:

. pH/ORP Controllers pH electrode calibration methods
. pH/ORP Controllers pH measurement values explained
. pH/ORP Controllers pH electrode calibration explained
. pH/ORP Controllers pH electrode maintenance explained
. pH/ORP Controllers pH electrode reference systems and diaphragms explained
. Product Support
. Water Quality Sensors

pH/ORP Controllers Product Description
The Global Water 6309POT multiparameter pH/ORP Controller measures, analyzes, and controls pH, ORP and temperature in one easy to use unit.  The pH/ORP Controller's setup and calibrations are done through a user-friendly menu that may be password protected.  Calibrations can be performed quickly and accurately with automatic buffer recognition of U.S. or European buffer sets, with the values stored in the pH/ORP Controller's nonvolatile memory.  A large backlit display on the pH/ORP Controllers provide pH, ORP, and temperature plus the current mA output and relay status.

The WQ250 multiparameter pH/ORP controllers provide accurate on/off control via the five programmable relays or the 4 to 20 mA output may be used for proportional control.  A standard RS-485 output allows for remote access via PC compatible computer and makes it possible to link multiple pH/ORP controllers to a common control system.  The pH/ORP controllers built-in temperature and Automatic Temperature Compensation (ATC) functions may be used with an ATC type sensor or with a 10K ohm thermistor.

At power up, the WQ250 pH/ORP controllers perform a self-diagnostic to ensure proper operation.  pH/ORP controllers electrode efficiency can be displayed to indicate when electrode maintenance is necessary.  Housed in a watertight (IP65), DIN case, the 6309POT pH/ORP controllers include a terminal block that accommodates the tinned leads and spade lugs on industrial type pH and ORP electrodes.

NOTES: A BNC to Y adapter is required to maintain the IP65 rating when using sensors with a BNC connector.  A signal amplifier is required for sensor cable runs over 40 feet.
pH/ORP Controllers Specifications
Parameter: Range: Resolution: Accuracy:
pH -2.00 to 16.00 pH 0.01 pH 0.01 pH 1 LSD
ORP (absolute/relative) -2500 to 2500 mV / -3999 to 3999 mV 1 mV / 1 mV 0.2 % of span / 0.2 % of span
Temp 14 to 248 F (-10.0 to 120.0 C) 32.18 F (0.1 C) 32.18 F (0.1 C)

     Temp Compensation: Auto 14.0 to 248.0 F (-10.0 to 120.0 C)
     Buffer Recognition: 4.00, 4.01, 6.86, 7.00, 9.18, 10.01
     Buffer Temperature Range: 32 to 140 F (0 to 60 C)
     Electrode Offset Recognition: 100 mV at pH 7.00 - 91.7 to +108.3 at pH 6.86
     Electrode Slope Recognition: 30 % at pH 4.00, 4.01, 9.18 or 10.01
     Input Impedance: >1013 ohms
     Calibration End Point Sensing: Yes
     Temperature Sensor: Thermistor, 10.00 k ohm at 77deg F (25 C)

4-20 mA Analog Output:
     Input Select: User selectable pH or ORP
     Current Output Range: 4 to 20 mA (isolated), programmable span
     Current Output Scale: User programmable, linear or log
     Maximum Load: 500 ohm
     Accuracy: 0.02 mA
     Isolation Voltage: 500 V DC

     Control Type: 5 ON/OFF controls
     Relay Output: 5 A at 115 V AC or 2.5 A at 220 VAC, resistive load only

Power Supply: 115 V AC or 230 V AC at 50/60 HZ
Communication: RS-485
Display: 128 x 64 graphical LCD with backlight
Ambient Temp. Range: 0 to 122 F (0 to 50 C)
Case: IP65, 1/4 DIN case, 5.83 inch (148 mm) depth
Dimensions: 3 5/8"W x 3 5/8"H x 5 7/8"D (96 x 96 x 148 mm)
Weight: 2.1 lb (950 g)
Certifications: CE, ISO 9001:2000
pH/ORP Controllers Options & Prices
Prices listed are for United States and Canada only.  Call or e-mail us for pricing in other countries.
Terms and Conditions

6309POT pH/ORP Controller (PN# HB0500)
Industrial pH/ORP Controller sensor not included.
WQ220-020 pH/ATC Controller Electrode (PN# HB0610)
20 FT w/Spade & Tinned Leads
Pricing pH/ATC Controller Electrode
WQ620-020 ORP Controller Electrode (PN# HB0630)
20 FT w/Spade & Tinned Leads
Pricing ORP Controller Electrode
600B-Y Adapter (PN# HB0700)
BNC Connector to Spade Lugs & Tinned Leads
Pricing Controller Electrode Adapter
ORP15A Handheld ORP Meter Pricing
695ORP Industrial ORP Transmitter (PN# DO0500)
(ORP sensor not included)
WQ600 ORP/Redux Sensors (PN# DE0000) Pricing
PC320 pH Controller Pricing
WQ Water Quality Sensors Pricing
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