Sensors for National Instruments DAQ

Dissolved Oxygen Sensor

The DO2N-200E is a current to voltage adapter designed to work with a Clark-style oxygen electrode. This adapter delivers a polarizing voltage of -0.8V to the electrode to create a current, or flow of electrons, between the silver and platinum elements in the electrode. The flow of electrons between these elements increases and decreases as the concentration of oxygen in the polarograph chamber increases and decreases, respectively. The adapter then converts the changes in current to changes in voltage so that they can be recorded.

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Required every use

Default scaling Value

Water = 20%                                           
Diet Soda = 0%

Calibration Instructions
1. Install the IX-ELVIS board into the National Instrument ELVIS platform or the IX-myDAQ board onto the NI myDAQ. If using ELVIS, connect the ELVIS power supply to the ELVIS unit and connect it to the computer via a USB cable. Ensure both of the power switches are in the “on” position. For the myDAQ, connect it to the computer using the USB cable.

2. Connect the MINI DIN7 connector of the DO2N-200E to either CH1 or CH2 of either the IX-ELVIS or IX-myDAQ board.

3. Open the recording software, select the channel that the DO2N-200E is connected to and ensure the range is set to +/-5V. 4. Prepare 2 beakers, 1 with fresh diet soda and 1 with tap water. Ensure the volumes are the same.

5. Place the electrode of the DO2N-200E in the beaker with the water. Once the trace settles click Set for SP2 for 20 % dissolved oxygen.

6. Place the electrode in the beaker with the diet soda. Once the trace settles click Set for SP1 for 0 % dissolved oxygen.

*Note: The signal may be inverted if the IX-MYDAQ is used.

Measurement Instructions
1. Follow the calibration procedure above.

2. Set up the desired experiment and press record.

*Note: The signal may be inverted if the IX-MYDAQ is used.
  • Model: DO2N-200E

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