Alpha DO 500 Dissolved Oxygen 2-Wire Transmitter

  • Warranty This product comes with a 1 year warranty
  • User Friendly Offset adjustment function for ease of use
Product Options


Eutech produce the Alpha DO 500 dissolved oxygen 2-wire transmitter and RS Hydro are UK distributors of this reliable and accurate device. With a wide measurement range to a peripheral instrument of your choice and a reliable and accurate reputation, means this device the ideal choice for measuring dissolved oxygen in mg/L, ppm and % saturation simultaneously with temperature.

The integrated offset adjustment function allows you to adjust readings conveniently without the need to remove the electrode from the measurement tank or pipe.

Calibration is a quick and easy process using atmospheric air as calibration media for 100% air saturation, simply at the press of a button.

This product is covered by a 1 year warranty.

Manufactured by: Eutech Instruments
Model: Alpha DO 500 Dissolved Oxygen 2-Wire Transmitter

Services offered for this product

  • Sales
  • Rental
  • Installation
  • Calibration
  • Maintenance


Dissolved Oxygen
Range 0 to 19.99 mg/L / 0.00 to 19.99 ppm
0 to 199.9 % saturation
Resolution 0.01 mg/L or 0.01 ppm
0.1 %
Accuracy ±1.5 % full scale
Range 0.0 to 100.0 °C
Resolution 0.1 °C
Accuracy ±0.5 °C
Sensor Pt100; 2 or 3 wire
Compensation Auto/manual (0 to 50 °C)
Compensation 0.74 to 3.00 bars
550 to 2250 mmHg
10.7 to 43.5 psi�???????�??????�?????�????�???�??�?� 
(manual setting and automatic correction)
Compensation 0.0 to 50.0 ppt
(manual setting and automatic calibration)
Transmitter Function 4 to 20 mA scalable outputs for Dissolved Oxygen, galvanically isolated
Out-Of-Range Current Output 3.8 mA:
‘On’ select selects 3.8 mA
‘Off’ selects 4 mA (under range)
Selects 20 mA (over range)
Hold Current Output 22 mA:
‘On’ select selects 22 mA
‘Off’ selects last measured current value
Load Max. 600 Ohm
Electrical Data And Connections
DO Input 2-pin terminal
Connection Terminal 3-pin & 8-pin terminal, detachable blocks
LCD 7 segments display with symbols for status information
Power Supply
Input 12 to 24 V DC
EMC Specifications
Emitted Interference According to EN 61326
Immunity To Interference According to EN 61326
Environmental Conditions
Operating Temperature Range 0 to 40 °C
Max. Relative Humidity 80 % up to 31 °C decreasing linearly to 50 %Ã????????Ã???????Ã??????Ã?????Ã????Ã???Ã??Ã? 
at 40 °C
Mechanical Specifications
Dimensions (WxHxD) 96 x 96 x 66 mm
Weight 210 g (unit) / 310 g (packed)
Ingress Protection IP65