Tel. 01785 254597
The P7635 pH Controller is available in either surface mounting or panel mounting configuration:-
Model number P7635-W is supplied in a surface mounting enclosure
Model number P7635 pH controller is supplied in panel mounting configuration.
The P7635 pH Controller is a panel mounting pH controller with a large bright red LED digital display in a DIN spec housing 96 x 96 mm and is designed for the DN 47300 standard. This instrument also has a very short case length at only 95 mm allowing the controller to be mounted into compact sized control panels saving on both space and cost.
The P7635 has user selectable ranges allowing it to be used for either the monitoring and control of pH or Redox (ORP) millivolt. The P7635 can be selected for use with pH probes, Redox Probes, or with Antimony Electrodes for pH measurement in solutions containing HF (Hydrofluoric acid)
The range of the instrument is across the full 0 - 14.00 pH scale and from -1000mV to +1000mV for the measurement of Redox (ORP).
In addition this instrument also has temperature compensation which maybe manually set over the range of 0 - 100ºC or automatically compensated for over the 0-100ºC. The Automatic Temperature Compensation is through the use of either a Pt100 or Pt1000 temperature sensor. These are available from AWE Direct as either a pH Electrode with a built in Temperature Sensor, or as a separate stand alone temperature sensor.
When measuring pH we suggest pairing our instrumentation with an AWE pH electrode or another good quality electrode. For Redox measurement we recommend pairing the P7635 with an AWE Platinum band Redox Probe or another precision Redox probe.
The P7635 is fitted with two programmable on / off control relays. These can be programmed for either high or low operation and have adjustable delay timers. The on / off control relays are SPST 5 amp non inductive.
Within the instrument a pH value can be assigned as a setpoint (such as a value of 7.00pH).
When the pH value is below this point, a control relay will switch allowing a dosing pump to activate or a normally closed solenoid valve to open. When the set point value (e.g. pH 7.00) is reached the control relay will switch again to stop the dosing pump from operating or to return the solenoid valve to closed. In this instance the on / off control relay is set to low.
As the P7635 pH Controller includes 2 x control relays the pH value of the second control relay can be assigned another value. For example this value could be set at 10.00 pH. If the pH is above this value, a second dosing pump or solenoid valve could be controlled to dose an acid reduce the pH value below the 10.00 pH setpoint. This second on / off control relay would be set to high. This setup would ensure that in this treatment example the pH value would remain between 7 & 10 pH.
In addition to the On / Off control relays the P7635 includes a SPDT 5 amp non-inductive alarm relay with adjustable delay timer. This can be set to operate on both a high and low measured value. The alarm relay is often used to control an audible alarm and / or control beacon.
The P7635 pH Controller has an isolated current output which corresponds to the measuring range selected (either pH Control or Redox Control) and can output either a 0 - 20mA or a 4-20mA signal. The current output is non-expandable and often used with a PLC or Chart Recorder.
P7635 Controller Specifications
Range pH: 0.00 - 14.00 pH.
Range Redox (ORP): 0 - ±1000mV
Display: 4 Digit Bright LED.
Temp Range: Measuring and Compensating 0-100ºC or 32 - 212ºF
Automatic Temp Comp: Automatic via 3 wire PT100 or PT1000 Sensor.
Manual Temp Comp: Manually Selectable from 0 - 100ºC
Zero: ± 2.00pH
Slope: 80% - 110%
Resolution: 0.01 pH.
Set Points: 2 min / max selectable contacts SPST, 5 amp non-inductive.
Action: On / Off with delay timer of 0 - 100 seconds.
Alarm Relay: 1 Min or Max. Contacts SPDT, 5 amp non-inductive.
Action: On / Off with delay timer 0 - 100 seconds.
Current Output: 0 - 20mA or 4 - 20 mA isolated to 600 ohms.
Power supply: 86 - 264 volt at 50 / 60Hz via switch mode power supply.
Power Consumption: 6 VA
Weight: 500 grams DIN rail version.
Dimensions: 96 x 96 x 95mm cutout 92 x 92mm
Ordering: Please Specify model:- P7635 Panel Mounting pH Controller and P7635-W Surface Mounting pH Controller
P7635 Data Sheet
Our 9093-10B Sealed Combination pH Electrode with peripheric annular ceramic junction.
The 9093-10B is a glass bodied sealed combination pH electrode designed for laboratory and industrial use. The pH electrode is constructed in glass with a sealed single non-fouling peripheric ceramic reference junction. The electrode has a silver - silver chloride reference element.
The 9093-10B Combination pH electrode is widely used with our pH controller range. For tougher laboratory applications the electrode is easily paired with one of our portable pH meters. The 9093-10B pH electrode offers precision measurement, excellent repeatability, non-fouling peripheric ceramic reference junction and due to the specialised filling is suitable for a temperature range of 0 - 100°C.
The mounting cap on the Combination pH Electrode model 9093-10B is Ryton with a small flange for mounting the pH electrode into our PES style holders.
The 9093-10B pH electrode is available with a number of connection types; as standard we supply the 9093-10B with 3 metres of connecting cable and a BNC fitting.
For custom fitting types please see the below table for the ordering number and options:-
Combination pH Electrode Model Number.
10 = 3 Metres
20 = 6 Metres
30 = 9 Metres
B = BNC Connector (Most Common)
T = Stripped & Tinned Connections
S8 = S8 Connector (No Cable)
A = U.S. Standard Connector fitted to older U.S. pH Instruments
I = Din 19262 Connector for German pH Instruments
K = Belling Lee Connector for older U.K. pH Instruments
More information on pH electrode connection types
The 9093-10B Combination pH Electrode maybe used as a replacement for many other manufacturers electrodes, often outperforming the original electrodes.
Range pH: 0 - 13 pH
Operating Temperature: 0 - 100°C
Response Time: Very Fast.
Electrode Type: Glass Combination pH electrode.
Reference Type: Silver - Silver Chloride
Junction Type: Peripheric Annular Ceramic Type.
Dimensions: 110mm Long x 12mm ∅
Model Numbers Available Ex-Stock:
9093-10B - Glass pH Electrode with 3 metres connecting cable & BNC fitting.
9093-10T - Glass pH Electrode with 3 metres connecting cable & stripped and tinned connections.
Ordering: Please Specify model using 9093 and then the naming convention defined in the above table for cable and connection type.
pH Electrodes Data Sheet
Our 9015-S8 is our budget pH Electrode with an S8 connector and is manufactured in Epoxy.
The 9015-S8 is a general purpose epoxy bodied sealed combination pH electrode designed for portable and light industrial use. By using constructing the pH electrode body in epoxy we have managed to bring the cost down to make a low budget pH electrode while still enabling precision pH readings. This electrode offers a fast response time and a stable reading.
The 9015-S8 general purpose budget pH electrode with S8 connector is designed for use with portable pH meters or in light industrial applications. The 9015-S8 is a sealed combination budget pH electrode with S8 connector and has a low impedance glass bulb, single junction reference and a silver - silver chloride element.
The 9015-S8 pH electrode is available with a number of connection types; as standard we supply the 9015-s8 as a pH electrode with S8 Connector.
Budget pH Electrode Model Number.
The 9015-S8 Budget pH Electrode maybe used as a replacement for many other manufacturers electrodes, often outperforming the original pH electrode
Range pH: 0 - 13 pH.
Operating Temperature: 0 - 60°C
Response Time: Fast.
Electrode Type: Budget Combined pH electrode.
9015-S8 - Budget pH Electrode with S8 Connector
9015-10B - Budget pH Electrode with 3 metres connecting cable & BNC fitting.
9015-10T - Budget pH Electrode with 3 metres connecting cable & stripped and tinned connections.
Ordering: Please Specify model using 9015 and then the naming convention defined in the above table for cable and connection type.
The AS183-20B Antimony pH probe has been designed for the measurement of pH in applications where Hydrofluoric or HF acid is present. Where the HF Acid would normally etch away the glass of a pH electrode - the Antimony in our pH probe is resistant to the effects of Hydrofluoric Acid.
The AS183-20B Antimony pH probe has been designed with the same care and attention as our full pH probe range and includes a body designed for maximum chemical resistance, pH probe guard to prevent large solids from blocking the Antimony and the 3/4" BSP thread allows the Antimony pH probe to be screwed into a dip pH assembly for submersion into tanks, pits, or lagoons or any other unpressurised vessel.
Some applications contain abrasive elements which result in the bulb of a standard glass pH electrode being damaged. For these applications and applications where Hydrofluoric Acid or blends of Sulphuric, Nitric and Hydrofluoric Acid are present - customers often specify an Antimony pH probe.
The AS183-20B is resistant to the etching effects of Hydrofluoric Acid. This immunity does mean that the range of the pH probe is limited and the response time is a little slower. We recommend the AS183-20B for use in applications where the pH is between 2 - 9pH for accurate readings and combining the antimony probe with a suitable pH instrument capable of working with the AS183-20B. Our P7635, P7335 and P7685 pH controllers are all compatible with Antimony probes.
The response time of the AS183-20B across large pH variations can take between 5 - 20 seconds to register on an instrument. The slower response time is a trade off against the resistance to Hydrofluoric acid.
The AS183-20B has a 3/4" thread for mounting into a dip pH electrode assembly and is available as a dip assembly using model number AS90S.
The AS183-20B is available with a number of connection types; as standard we supply the AS183-20B with 6 metres of connecting cable and a BNC fitting.
Antimony pH Probe
The AS183-20B Antimony pH Probe maybe used as a replacement for many other manufacturers electrodes, often outperforming the original electrodes.
Range pH: 2 - 9 pH
Response Time: Fair.
Electrode Type: Antimony.
Reference Type: N/A
Junction Type: N/A
Dimensions: 116mm Long x 33mm ∅
Fitting: Single 3/4" BSP Thread
AS183-20B - Long Life pH Probe with 3 metres connecting cable & BNC fitting.
Ordering: Please Specify model using AS183-20B and then the naming convention defined in the above table for cable and connection type. Due to the nature of the applications that this product is intended for we would recommend discussing your applications with our sales team first by calling 01785 254 597 first.
pH Probe Data Sheet
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We are now able to supply our P8000-10B series high performance combination pH electrodes with a porous teflon liquid junction, and our R8000-10B series of high performance combination redox electrodes with a porous liquid junction.
The new range of P8000 pH Electrodes and R8000 Redox Electrodes are ideal for solutions which are incompatible with ceramic. Some chemical blends involving strong acids or strong alkali solutions can slowly dissolve the ceramic junction. Other substances can block the ceramic junction such as biological effluents which contain fats, oils or greases.
The P8000-10B porous teflon liquid junction pH electrodes and R8000-10B high performance liquid teflon junction redox electrodes aim to eliminate these concerns.
More about our P8000-10B High Performance pH Electrodes and R8000-10B High Performance Redox Electrodes