Trace level dissolved oxygen sensor

Trace level dissolved oxygen sensor

The new generation of ppb dissolved oxygen sensor from Frog Vision is based on the principle of fluorescence quenching. Blue light is irradiated onto the fluorescent oxygen molecule probe to excite red light. As the oxygen molecule is the quenching agent of the fluorescent probe, it can take away energy. Therefore, the time and intensity of the excited red light are inversely proportional to the concentration of the oxygen molecule. The dissolved oxygen sensor calculates the concentration of oxygen molecules by measuring the phase difference between the excited red light and the reference light, and combining it with a temperature compensated 3D calibration data model.

Advantages:

Smart sensor, all calibration parameters are stored inside the sensor, plug and play.

Optical technology eliminates the need for frequent replacement of membranes or replenishment of electrolyte solutions.

No preheating required, fast response speed, with a maximum response time of 30 seconds (T90).

The measurement process does not consume oxygen.

PTFE support material, resistant to certain solvents, with small drift and easy storage.

Our self-developed membrane, oxygen probe, and key components are all controllable.

RS485 digital output, supporting Modbus protocol.

• SS316，PVC， All titanium alloy shell, with multiple options available.

Trace level dissolved oxygen sensor

Precautions for on-site installation:

1. On site, depending on the actual situation, the sensor can be fixed with a 6-point (3/4 NPT) thread or installed with accessory brackets, or other installation methods that can fix the sensor.

2. Fixed installation is preferred for installation, and drag chain installation is prohibited.

3. During installation, full consideration should be given to changes in water flow and liquid level to ensure that the water flow can cross the surface of the sensing membrane without obstruction.

4. The shielded wire needs to be grounded together with the equipment, and the sensor does not support hot swapping.

Calibration:

1. The product is calibrated using standard gases with different oxygen contents at the factory.

2. Support user 1-point calibration, slope K and offset B. That is, Y=K * X+B, where Y is the user reading and X is the original sensor measurement value. The factory default is K=1 and B=0. Please refer to the company's videos and documents for detailed calibration methods and steps.

preservation:

The sensing membrane must be stored in a moist environment, otherwise drift may occur. Drift is reversible and will automatically repair after being placed back in a moist or water environment. But it may take up to 2 weeks to wet and soak.