Eutech Instruments

Eutech Instruments

alpha DO2000 Series Dissolved Oxygen Analyzer/Controller
From Eutech Instruments


Industrial Process Controllers & Monitors

alpha,DO2000,Series,Dissolved,Oxygen,Analyzer,Controller,Eutech,Instrumentsalpha DO2000 Series Dissolved Oxygen Analyzer/Controller

  • Available in both Galvanic (alpha DO2000) and Polarographic (alpha DO2000PG) versions.

  • Programmable for On/Off, Proportional, or PI (Proportional integral CONTROL) - ideal for most demanding precision process control applications

  • Calibration is quick and easy using the atmospheric air as the calibration media for 100% air saturation

  • User-Customization through Advanced Setup Menu offers flexibility in matching the controller's functions to suit individual's specific requirement

  • Includes Barometer pressure, Salinity, Temperature Compensation

  • 0 to 2000 Second Time Delay Adjustment on control and alarm delays

  • Non-Volatile Memory retains all stored parameters and calibration data even if power fails

  • Backlit 14 segments display with symbols for status information and On/Off selectable with four levels of brightness control

  • Adjustable Hysteresis (Dead Band) prevents rapid contact switching near set point

  • Three-Level Password Protection prevents unauthorized tampering with settings

  • Wash Contact Relay controls electrodes cleaning systems at desired duration and frequency

  • Universal Power Supply Input from 85 to 250 VAC/DC allows use at multiple sites and withstands voltage fluctuations

  • Choice of Temperature Sensor Pt100/Pt1000 with 2-wire or 3-wire temperature input selection

  • Dual Display shows Dissolved Oxygen value with temperature simultaneously - features clear multiple icons, set points, and status messages

  • Rugged NEMA 4X housing protects controller from the elements and dirty industrial applications

  • Easy Installation and Wiring with detachable plug-in connectors

alpha,DO2000,Series,Dissolved,Oxygen,Analyzer,Controller,Eutech,Instruments E-Brochure

alpha,DO2000,Series,Dissolved,Oxygen,Analyzer,Controller,Eutech,Instruments Instruction Manual


General: Useful for monitoring temperature and control of DO in wastewater treatment and aquaculture applications. Use with valves, blowers or aerators to ensure proper system operation.


Product Specification

DO Range Galvanic: 0.00 25.00 mg/l or 0.00 300% Saturation
Amperometric: 0.00 20.00 mg/l or 0.00 200% Saturation
Resolution 0.01 mg/l or ppm or 0.1 %
Accuracy Galvanic: 1.5 % full scale
Amperometric: 1% full scale
Temperature Range -10.0 to 125 C (14.0 to 257.0 F)
Resolution & Relative Accuracy 0.1 C / F &
0.5 C / 1.0 F
Temperature Sensor Galvanic: Pt100/ Pt1000 (jumper selectable); 2 or 3 wire
Amperometric: NTC 22 kΩ Thermistor
Temperature Compensation Auto / Manual
Salinity Compensation 0.0 to 50.00 ppt (Manual setting and Automatic correction)
Pressure Compensation 0.740 to 3.000 Bar; 555 to 2250 mmHg; 10.73 to 43.51 PSI
(Manual setting and Automatic correction)
Set Point and Controller Functions
Integral Time 0 to 999.9 minutes
Switching Hysteresis Galvanic: 0 to 10% full scale
Amperometric: 0.1 to 1.0 mg/l or 1.0 to 10.00 %
Function (Switchable) P/PI control (Pulse Length / Pulse Frequency);
Limit Control; Off
Adjustable Period with Pulse Length Controller 0.5 to 20 seconds
Adjustable Period with Pulse Frequency Controller
60 to 120 pulses/min
Pickup / Dropout Delay 0 to 2000 seconds
Wash Cycle 0.1 to 200.0 hours
Wash Duration 1 to 2000 seconds
Contact Outputs, controller
1 SPDT, 3 SPST relays
Switching Voltage / Current / Power Max 250 VAC / Max 3A / Max 600VA
Alarm Functions
Function (Switchable)
Latching / pulse
Pickup Delay 0 to 2000 seconds
UV coat, backlit 14 segments display with symbols for status information
Backlight On/Off selectable with four levels of brightness control
Electromagnetic Compliance (EMC) Specifications
Emitted Interference
According to EN 61326
Immunity to Interference According to EN 61326
Environmental Conditions
Ambient Temperature Operating Range 0 to 50 C
Maximum Relative Humidity 80% up to 31 C decreasing linearly to 50%
at 40 C
Power Supply
80 to 250 VAC/DC 50/60 Hz Approx. 10 VA
Main Fuse
Galvanic: 315 mA Anti-surge, 250 V
Amperometric: 250 mA, Anti-surge
Pollution Degree 2
Transient Overvoltage Category II
Electrical Data and Connections
Transmitter Function Two 0/4 to 20 mA scalable outputs for pH/ORP and temperature, galvanically isolated
Load Max 600 W
DO Input Screw terminals
Connection Terminal
5-pin, 8-pin, 9-pin and 13-pin terminal, detachable blocks
Connection Terminal
Wall mount: 2x3-pin, 8-pin 9-pin and 13-pin terminal blocks
Panel mount: 3-pin, 9-pin and 19-pin terminal blocks
Mechanical Specifications
Dimensions (W x H x D) Wall-mount (Galvanic)
Wall-mount (Amperometric)
144 x 144 x 111.5 mm
144 x 144 x 110 mm
175 x 96 X 96 mm
Weight Wall-mount
745g (Unit) / 1100g (Packed)
700g (Unit) / 850g (Packed)
Environmental Rating Wall-mount
IP66 (NEMA 4X)
IP54 (front panel)

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