Search This Site

(Search by Product Type i.e. Level or Brand Name i.e. Walchem)

Eutech Instruments

Eutech Instruments

alpha-DO1000 1/4 DIN Dissolved Oxygen Controller
From Eutech Instruments


Industrial Process Controllers & Monitors

alpha,DO1000,1/4 DIN,Dissolved,Oxygen,Controller,Eutech,Instrumentsalpha-DO1000 1/4 DIN Dissolved Oxygen Controller

  • 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 settings

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

  • Galvanically Isolated Scalebale 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

alpha,DO1000,1/4 DIN,Dissolved,Oxygen,Controller,Eutech,Instruments E-Brochure

alpha,DO1000,1/4 DIN,Dissolved,Oxygen,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 mg/l of oxygen: 0.00 20.00 mg/l
% saturation of oxygen: 0.0 to 200.0% saturation
Resolution & Accuracy 0.01 mg/l or 0.1%
1.5% of full scale reading
No. of calibration Points 1 (100% saturation) or
2 (100% and 0% saturation) points
Flow rate 1 2 cm/sec
(dependent on both Temperature & Oxygen level)
Response Time 40 50 secs to attain 95%
Temperature Range -9.9 to 125 C
Resolution & Relative Accuracy 0.1 C & 0.5 C
Temperature Sensor Pt 100
Temperature Response Approx. 1 min/ C
Temperature Compensation Auto / Manual (reference at 25 C)
Pressure Input K. Pas/mm Hg (Manual input and Automatic correction)
Salinity Input 0.0 to 50.0 ppt (Manual inout and Automatic correction)
Set Point and Controller Functions
Function Limit / Proportional (pulse or frequency) controller
Adjustable Period with Pulse Length Controller 0.5 to 20 secs
Adjustable Period with Pulse Frequency Controller 60 to 120 pulses/min
Switching Hysteresis 0.1 to 1.0 mg/l or 0 to 10.0%
Pickup / Dropout Delay 0 to 2000 seconds
Contact Outputs, Controller
2 potential free change-over contacts
Switching Voltage / Current / Power Max 250 VAC / Max 3A / Max 600VA
Alarm Functions
Function (Switchable) Launching or Pulse
Pickup Delay 0 to 2000 seconds
Switching Voltage / Current / Power Max 250 VAC / Max 3A / Max 600VA
Electrical Data and Connections
Power requirement 110/ 220 VAC (jumper selection)
Frequency 48 to 62Hz
Signal Output 0/4 to 20mA, galvanically isolated
Load Max. 600 Ω
Connection Terminal Terminal blocks 5-pole/ 17-pole, removable
Main Fuse/ Fine Wire Fuse Slow-blow 250 V/ 100 mA
EMC Specifications
Emitted Interference
According to EN 50081-1
Immunity to Interference According to EN EN 50082-1
Environmental Conditions
Maximum Relative Humidity 10 to 95%, non-condensing
Ambient Temp. Operating Range 0 to 50 C
Mechanical Specifications
Dimensions 175 x 96 x 96 mm
Weights Max. 0.7kg
Material ABS with polycarbonate
Insulation IP 54/ IP 40


About Us

Metex Corporation Limited has been providing superior products and services to the process control, chemical treatment, waste water, industrial and manufacturing industries for over 25 years. It is our goal to continually provide our customers with the best possible equipment, technology, and service.


Our Products

Dataloggers, sensors, pumps, recorders, hand held instruments, flow instrumentation, level controls, valves, instrumentation, containers, tanks, transmitters, data loggers, digital indicators, mixers and agitators, pressure intrumentation, analyzers and controllers for a variety of industrial applications such as water quality, pH/ORP and more.

Website Content

Water Analyzers and Controllers, Wireless Products, Corrosion Monitoring Equipment, Cooling Tower and Boiler Controllers, a wide variety of Pumps, Valves, Dataloggers and Recorders, HVAC, Instrumentation, Skids and Systems, Containers and Tanks from world leading manufacturers are products you will find on this site.

Get in Touch