AWE Automated Water & Effluent Ltd

pH / Redox Instruments
pH / Redox Controllers
pH / Redox Meters

pH is the measurement of Hydrogen Ion concentration in an aqueous liquid, which determines whether a liquid is neutral, acid or alkali (base). Usually measured with a glass or Antimony combination electrode which produces a millivolt potential proportional to the pH.

Redox (ORP)
Oxygen reduction potential which is a measurement of oxidation or reduction of a solution, measured with a similar electrode to pH but with a Platinum or Gold sensor.

We supply several options of pH instruments and Redox instruments including hand held stick pH meters through to our industrial range which includes pH transmitters and pH controllers for surface or control panel mounting.

AWE have been supplying pH Meters and Redox Meters to industry since 1982 and our easily recognisable AWE instruments can be found in installations throughout the world.

P7635 pH controller

P7635 pH controller

P7635 Panel mounting pH controller range 0 - 14.00 pH with 2 control relays and 1 alarm relay.

The P7635 pH Instrument has an isolated 0-20mA or 4-20mA current output and the power supply is 86-264 VAC 50-60Hz.

R7635 Panel mounting Redox controller range 0 - 1000 mV with 2 control relays and 1 alarm relay - a 0 - 20 mA or 4-20mA current output, power supply 86-264 VAC 50-60Hz.

Download PDFDownload P7635 pH controller PDF

P7687 pH controller / Redox Controller

P7687 pH controller

The P7687 is our new pH controller / Redox controller designed for precision pH or Redox measurements as well as precision control options.

Configurable by the user for either pH or Redox measurements when combined with a good quality pH or Redox Electrode.

As standard the P7687 has two user configurable set-points with associated control relays. These control relays can be independently configured for high or low operation, with either On/Off control, PFM for controlling dosing pumps proportionally or PWM for controlling solenoid valves proportionally.

In addition to proportional control of control equipment one powerful feature of the P7687 is the new PID (Proportional - Integral - Derivative) control functionality.

Using the PID control the P7687 will account for the distance the measured value is from the desired set-point, the rate of change, and the control methodology while incorporating the logarithmic nature of pH - which makes the P7687 a very powerful pH controller.

The P7687 also includes an auto-clean relay, alarm relay, and dual isolated 4-20mA outputs which are both proportional and expandable. The 4-20mA can be configured to output 2 x pH, 2 x Redox or 1 x pH and 1 x Temperature.

The P7687 features a large easy to read LCD (Liquid Crystal Display) with both the pH or Redox and Temperature displayed on the screen, as well as the status of the relays and the PID status graphically represented.

With a switch mode power supply the P7687 is suitable for 86 - 265 VAC at 50Hz / 60 Hz.

Download PDFpH instruments and Redox Instruments Download PDF

P7685 pH controller

P7685 pH controller

P7685 Microprocessor pH/mV controller, panel mounting with two control relays selectable for on/off, PFM or PWM control, alarm relay with delay timer and isolated 0-20/4-20 mA output. For proportional control of two dosing pumps or solenoid valves, power supply 115/230 VAC

P7685-010 As P7685 but with 2 x current outputs for pH, and/or oC, Auto clean output with freeze and hold with cleaning and recovery timer.

Download PDFpH instruments and Redox Instruments Download PDF

P3647W pH controller

P3647W pH controller

P3647W pH controller range 0 - 14.00 pH with 2 control relays and a 4 - 20 mA current output, power supply 115/230 VAC supplied in IP55 surface mounting enclosure.

Download PDFRedox Controllers Download PDF

R3647W millivolt Redox controllers: range 0 - 1000 mV with 2 control relays and a 4 - 20 mA current output, power supply 115/230 VAC supplied in IP55 surface mounting enclosure.

P3630W Two wire pH transmitter

P3630W Two wire pH transmitter

P3630W Two wire pH transmitter range 0 - 14.00 pH with isolated 4 - 20 mA O/P power supply 24VDC supplied in IP55 surface mounting enclosure.

R3630W Two wire mV Redox transmitter range 0 - 1000 mV with isolated 4 - 20 mA O/P power supply 24VDC supplied in IP55 surface mounting enclosure.

WD-36534 Waterproof Portable pH Meter

WD-36534 Waterproof Portable pH Meters

WD-36534 Waterproof Portable pH tester, it even floats, compact economical and easy to use, push button calibration with buffer recognition range 0 - 14.0 pH

Download PDFDownload PDF

Redox Meters 7635-w

Our Range of pH Meters and Redox Meters are available in wall mounted versions too. These models are denoted with a W at the end of the model number. Such as the PH7635W shown above.

Contact sales on 01785 254 597 for more information on our pH Instruments, pH Meters, Redox Meters, and other Redox Instruments, or to purchase our products.