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Dissolved Oxygen : In line Dissolved Oxygen / Dissolved Oxygen Transmitter Controller for Oxygenated Water (Alpha DO1000)

The Alpha DO1000 in line Dissolved Oxygen Monitor / Dissolved Oxygen Transmitter Controller offers the user the facility to measure dissolved oxygen levels in oxygenated water using powerful programmable functions and enhanced performance that simplify complicated procedures associated with continuous in line Dissolved Oxygen measurements. Advanced user-customizable features in the Alpha Do1000's powerful SETUP function include: Two Galvanically Isolated Scaleable 0-20/4-20 mA Outputs for fine control, 2 independent set-points with hysteresis protection, built-in proportional control, and noise grounding functions. Being menu-driven, the alpha DO1000 controller offers quick access and greater flexibility to configure measurement functions to suit the needs of process plants that demand high-end features at an economical price. Applications for the Alpha DO1000 include :

Industrial : 

Monitoring temperature and control of Dissolved Oxygen in wastewater treatment and aquaculture applications, effluent control, water quality measurements & Oxygenated treatment in power utilities, Water treatment in the semiconductor industry, Boiler feed water concentration samples and  use with valves, blowers or aerators to ensure proper system operation.

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
  • Readout in mg/L, pm or % saturation
  • Barometric and Salinity Automatic Compensation after manual input
  • 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
  • Wash Contact Relay controls electrodes cleaning systems at desired duration and frequency
  • Choice of General Purpose or Low DO measurement for wider 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 DO 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 EC-DOCTP1001/2
Dissolved Oxygen Range 0.00 - 19.99 mg/l (ppm); 0.00 to 199.9%
Resolution & Accuracy 0.01 mg/L or 0.1% & 1.5% Full scale
No. of Calibration Points 1 (100% saturation) or 2 (100% and 0% saturation)
Salinity/Barometric Pressure compensation 0.0 - 50 ppt; 555 to 808 mmHg or 74 to 108 kPA
Probe Type Galvanic cell
Response Time 40 seconds to achieve 93% of the reading
Temperature Range -9.9 to 125.0 C
Resolution & Accuracy 0.1 C & 0.5 C
Pressure Input KPa/mmHg (manual input or automatic correction)
Type of Controller Setting Off (Monitoring); Limit;
Proportional (Pulse Length or Pulse Frequency)
Pickup/Dropout Delay 0 to 2000 seconds
No. of Relays
Maximum Voltage
Maximum Current
High/Low Hysteresis Band
2 SPDT; 1 Alarm
250 VAC
0.1 to 1.0 mg/L or 1 to 10.0 %
Wash Cycle/Duration 0.1 to 199.9 hrs & 1 to 1999 sec
Contact Set-points Lo/Lo; Lo/Hi; Hi/Lo; Hi/Hi (selectable)
Alarm Function Latching / Pulse (software)
Power 120 or 240 VAC, 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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