Typical applications

　　Wastewater, industrial water, drinking water

　　Features and advantages

　　● No calibration required

　　● No need to replace diaphragms

　　● No service is missed. Cleaning service prompts are customizable

　　● No drift, stronger and stronger. Precise calibration is completed before leaving the factory

　　● No film, no cathode or cathode, no electrode solution, resistant to H2S, metal ions, and oil contamination

　　Measurement principle

　　The sensor cover at the very front end of the LDO probe is covered with a layer of fluorescent material. Blue light emitted by the LED light source shines onto the fluorescent material, which excites the phosphorescent material and emits red light; A photocell detects the time it takes for a fluorescent material to emit red light and return to the ground state. This time only occurs when the blue light is emitted

　　and the amount of oxygen is related. The probe also has an LED light source that emits red light simultaneously with blue light, serving as a reference for the blue light emission time. The more oxygen around the sensor, the shorter the time for fluorescent substances to emit red light. Based on this, the concentration of dissolved oxygen is calculated.