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pH/ORP Controller

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  • Selectable pH or ORP Measurement in one controller via its IP54 front panel
  • User-Customization through Setup Menu in matching the functions to suit an individual's specific requirement
  • Tri-Level Password Protection against authorized tampering
  • Built-in Proportional Control for finer process control system
  • Symmetrical Mode of operation in electronically noisy environment
  • Choice of Glass or Antimony Electrode for general purpose or hydrofluoric acid applications 
  • Non-Volatile Memory retains all stored measurement parameters and calibration data even if power is disconnected
  • Choice of Temperature Sensor Pt100/Pt1000 with 2-wire or 3-wire temperature input selection
  • Two contact relays and 1 Alarm/Wash Relay with independent timer control
  • When set to work as Alarm relay, alerts you to set points exceeded for a set-point limits for certain time and if the Pt100/Pt1000 wires are broken or disconnected during the ATC function
  • Programmable duration and frequency in the Wash mode
  • Choice of 7 buffers from NIST or USA standards
  • Automatic Calibration with Auto-Buffer Recognition eliminates mistakes during calibration
  • Hysteresis Band Protection against rapid control switching of relays from wear and tear
  • Electrode Diagnosis of displayed slope value after every successful calibration to verify electrode performance
  • Scalable 0/4..20 mA Transmitter Isolated Output for use to maximize the resolution on the chart recorder
  • ORP measurement available in % toxicity or mV as units of measure - ideal for chromate reduction, cyanide oxidation and other ORP applications
  • IP54 rated front panel against dust and accidental water spills
  • Installation and wiring are easily performed with detachable plug-in connectors
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The microprocessor-based alpha-pH1000 pH/ORP controller is CE and UL certified in compliance to meet international standards against electromagnetic interference. Ideal for power plant, drinking water, electroplating, paper and pulp bleaching, boiler and cooling towers, water treatment applications and more.

Specifications of pH Controller

Product Code

 EC-PHCTP1001/2
pH Range -2.00 to 16.00 pH
Resolution & Accuracy 0.01 pH & ± 0.01 pH
Slope Range 40 to 70 mV
Offset Adjustment Range ± 120 mV
pH Buffer Options pH 1.01, 4.01, 6.86, 7.00, 9.00, 9.18, 10.01
No. of Calibration Points 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
3A; 
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 0.1 to 199.9 hrs
Wash duration 1 to 1999 s
Power Requirement 120 or 240 VAC (jumper selection)
Dimensions 1/4 DIN (96 x 96 mm)