Alpha DO 1000 Dissolved Oxygen Controller/Transmitter

  • Dissolved Oxygen Range Measurement range 0.00 to 20.00 mg/L ; 0.0 to 200.0 %
Product Options


If you require an extensive measurement range of dissolved oxygen in ppm, mg/L or % saturation the Alpha DO 1000 controller/ transmitter is the perfect solution. This device is accepting of low range (0 to 10 ppm) and general range (0.5 to 40 ppm) probe, in addition this versatile controller/transmitter offers three dissolved oxygen modes: limit control. proportional pulse length control and proportional pulse frequency control.

The Alpha DO 1000 enables one point or two point DO calibration with electrode information is displayed after each successful calibration, previous calibration data is retained in the event of an unsuccessful calibration. Extensive accuracy features of the Alpha DO 1000 which enhance the users experience are automatic salinity and pressure compensation after each manual input and the option of manual of auto temperature compensation for enhanced accuracy.

Galvanically isolated, scaleable 0/4 to 20 mA output is a feature which provides high quality output on peripheral devices.

This product comes with a 1 year warranty.

Manufactured by: Eutech Instruments
Model: Alpha DO 1000 Dissolved Oxygen Controller/Transmitter

Services offered for this product

  • Sales
  • Rental
  • Installation
  • Calibration
  • Maintenance


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.


Dissolved Oxygen
Range 0.00 to 20.00 mg/L ; 0.0 to 200.0 %
Resolution 0.01 mg/L ; 0.10 %
Accuracy ±1.5 % of full scale reading
Range -9.9 to 125.0 °C
Resolution 0.1 °C
Accuracy ±0.5 °C
Sensor Pt100 ; 3 wire
Temperature Compensation Auto/manual
Salinity Compensation 0.0 to 50.0 ppt
(manual setting and automatic correction)
Pressure Compensation kPa/mmHg
(manual setting and automatic correction)
Set Point And Controller Functions
Set Point 1 (SP1) /
Set Point 2 (SP2)
0.00 to 20.00 mg/L or 0.0 to 200.0 %
Switching DO Hysteresis 0.1 to 1.0 mg/L or 0 to 10.0 %
Function (Switchable) P control (pulse length/pulse frequency);
limit control
Adjustable Period With Pulse Length Controller 0.5 to 20 sec
Adjustable Period With Pulse Frequency Controller 60 to 120 pulse/min
Pickup/Dropout Delay 0 to 2000 sec
Contact Outputs 3 SPDT relays
Switching Voltage/
Max. 250 VAC / max. 3 A / max. 600 VA
Alarm Functions
Function (Switchable) Steady or fleet (pulse)
Pickup Delay 0 to 2000 sec
Switching Voltage/
Max. 250 VAC / max. 3 A / max. 600 VA
Electrical Data And Connections
Transmitter Function 0/4 to 20 mA scalable outputs for Dissolved Oxygen, galvanically isolated
Hold Function Switch To freeze output current and deactivate control relays
Load Max. 600 Ohm
DO Input 2-pin terminal
Connection Terminal 5-pole, 17-pole terminal, detachable blocks
LCD 7 segments display with symbols for status information
Power Supply
Input 110 VAC (jumper selectable) ; 48 to 62 Hz ; max. 7 VA
(For TSDOCTP1001)
220 VAC (jumper selectable) ;48 to 62 Hz ; max. 7 VA
(For TSDOCTP1002)
Main Fuse Slow-blow 250 V / 100 mA
Pollution Degree 2
Transient Overvoltage Category II
EMC Specifications
Emitted Interference According to EN 50081-1
Immunity To Interference According to EN 50082-1
Environmental Conditions
Operating Temperature Range -10 to 50 °C
Max. Relative Humidity 80 % up to 31 °C decreasing linearly to 50 %
at 40 °C
Mechanical Specifications
Dimensions (WxHxD) 96 x 96 x 175 mm
Weight 700 g (unit) / 800 g (packed)
Ingress Protection IP54 (front panel)