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pH / Redox : Industrial On line pH Meter / Redox (ORP) Monitor for pH water and waste water treatment (Alpha PH1000)

Industrial On line pH Meter / Redox (ORP) Monitor for pH water and waste water treatment. Our Alpha1000 Process Control pH / Redox (ORP) meter shares many of the advanced features of the Alpha 2000 Wall mounted unit with the advantage of being Panel Mountable and is ideal for such applications as pH control in fume cupboards. In the consideration of safety issues and other constraints - the use of panel mounted instrumentation in such industries as Metal Finishing, Chemical process, Pharmaceutical production, Drug research, Fermentation and Sewerage treatment is often mandatory. As with the Alpha 2000, this instrument also has two Galvanically Isolated Scaleable 0-20/4-20 mA Outputs for pH/ORP and temperature, making it simple to configure to your SCADA, remote SCADA system or any other control device.

Applications for the Alpha pH1000 include :

Water Treatment : 

pH Measurement of Wetlands, Sewage Treatment, pH in flocculation tanks, Water Purification, Water Treatment, pH measurements on water filters Use for batch control, on-line control of incoming process water, effluent system treatment water and waste water treatment.

General :

Useful for any batch or on-line type application that requires accurate pH or ORP control.

Industrial : 

pH control in fume cupboards, Metal Finishing, Chemical process, Pharmaceutical production, Drug research, Fermentation and waste control industries.

Regulatory : 

Hook to recorder to document data for regulatory compliance.

Main Features :

  • Built-In Programmable Limit, Proportional (Pulse Length or Pulse Frequency) - ideal for precision process control applications
  • User-Customization through Advanced Setup Menu offers flexibility in matching the controller's functions to suit individual's specific requirement
  • Automatic Calibration with Auto-Buffer Recognition eliminates mistakes during calibration
  • Symmetrical Mode Operation eliminates electronic noise problems when used with solution ground
  • One-Point Online Calibration without shutting down the line
  • Hold Relay for use with float switches/flow switches and other controllers as a failsafe function
  • Two Level Password Protection prevents un authorized tampering with settings0 to 2000 Second Time Delay Adjustment on control and alarm delays
  • Two Galvanically Isolated Scaleable 0-20/4-20 mA Outputs for pH/ORP
  • Wash Contact Relay controls electrodes cleaning systems at desired duration and frequency
  • Choice of Glass or Antimony Electrode for general purpose or hydrofluoric acid applications
  • Adjustable Hysteresis (Dead Band) prevents rapid contact switching near set point
  • Non-Volatile Memory retains all stored parameters and calibration data even if power fails
  • Large Dual Display shows pH (or ORP) with temperature simultaneously - features clear multiple icons, set points, and status messages 
  • Choice of Temperature Sensor Pt100/Pt1000 with 2-wire or 3-wire temperature input selection Easy Installation and Wiring with detachable plug-in connectors


Product Code

pH Range 0.00 to 14.00 pH
Resolution & Accuracy 0.01 pH & 0.01 pH
pH Buffer Options pH 1.01, 4.01, 6.86, 7.00, 9.00, 9.18, 10.01
No. of pH Calibration Points Up to 2 points
ORP Range (% or mV) 0 to 100%; -1000 to + 1000 mV
Resolution & Accuracy 0.1% Full Scale or 1 mV & 1 mV
Temperature Range -9.9 to 125.0 C
Resolution & Accuracy 0.1 C & 0.5 C
Sensor (for ATC) PT100/PT1000
Type of Controller Setting Off (Monitoring); Limit; 
Proportional (Pulse Length or Pulse Frequency)
Pickup/Dropout Delay 0 to 2000 seconds
Electrode Type Selection Glass or Antimony
Signal Input Asymmetrical / Symmetrical
Signal Output Range Scaleable (pH 1 to 14)
No. of Relays
Maximum Voltage
Maximum Current
High/Low Hysteresis Band
2 SPDT; 1 Alarm
250 VAC
0.1 to 1.0 pH; 10 to 100 mV
Contact Set-points Lo/Lo; Lo/Hi; Hi/Lo; Hi/Hi (selectable)
Alarm Function Latching / Pulse (software)
Wash Cycle/Duration 0.1 to 199.9 hrs & 1 to 1999 sec
Power 120 or 240 VAC/DC, 50/60 Hz
Dimensions 1/4 DIN (96 x 96 mm)

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Russell Mainstream Supply Ltd.


Cameron House, 8 Crown Square, Kingskettle, Cupar, Fife, KY15 7PW


Phone: +44 (0)1337 831192

Fax: +44 (0)1337 371192


Email: Sales@rmprocesscontrol.co.uk 



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