DOS-118G Portable Optical Dissolved Oxygen Meter
The company recently launched a new optical dissolved oxygen meter. Unlike traditional electrochemical sensors, optical dissolved oxygen sensor use fluorescence quenching techniques. This technique is based on a proven method for accurately measuring dissolved oxygen concentrations. The concentration of oxygen in the water can be measured by the quenching effect of the fluorescent substance on the surface of the sensor, without the need for internal filling, and without the need for preheating. The sensor has a fast response, does not consume dissolved oxygen, from the flow rate and the impact of test solution dirt and so on.
Principles and methods:
The sensor surface contains fluorescent or dye substances
LED emits blue light onto the sensor surface
Blu-ray causes the fluorescent substance to excite and emits red light
The time to emit red light is measured by the optical sensor
The red LED lamp is used as a reference light source
The higher the dissolved oxygen concentration, the red light emission time will be shortened, the optical sensor thus calculated by the oxygen concentration
ASI proprietary algorithms are more accurate than common linear algorithms
Technical Indexes
| Range |
0-20 ppm DO
(0-200% saturation) |
| Accuracy |
±0.1 mg/L ( 0-20 mg/L ) |
| Response time |
<60 second |
Features:
The price is reasonable
Maintenance-free: no need to add electrolyte solution
High stability, no need to regularly calibrate or replace the sensor cap
High repeatability, no drift measured
Simple operation, no agitation, no flow-dependent and accurate from dirt
Automatic temperature and pressure compensation, plug and use
Salinity compensation function: to test the sea water and a variety of salt solution dissolved oxygen
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