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Model：
HD-YR10
Introduction：
Online Fluorescence Dissolved Oxygen Monitor measures dissolved oxygen in water online by the fluorescence quenching principle. Widely used for wastewater treatment, aquaculture, rivers and environmental monitoring....
The fluorescence dissolved oxygen meter works on the quenching principle of the active fluorescence of specific substances in physics. Modulated green light illuminates the fluorescent substance and excites it, and red light is emitted. Because oxygen molecules can take away energy (quenching effect), the time and intensity of the excited red light are inversely proportional to the oxygen molecule concentration. A red light source synchronous with the green light is used as a reference; the phase difference between the excited red light and the reference light is measured and compared with the internal calibration value to calculate the oxygen molecule concentration, and the final value is output after temperature compensation. It is widely used in tap water, sewage, petroleum, chemical, aquaculture, metallurgy, power, food, pharmaceutical, papermaking, agricultural irrigation, domestic water and mining applications.
1. LCD screen with a Chinese interface, making operation simple and convenient.
2. Imported TI chip and anti-interference circuit for higher precision and greater stability.
3. Photoelectrically isolated 4–20 mA current output and RS-485 / RS-232 communication interface.
4. Adjustable hysteresis (dead band) prevents the relay from switching too frequently.
5. Built-in watchdog; data retention after power failure exceeds 10 years.
6. Dual-relay upper and lower limit alarm output.
7. The sensor is temperature-compensated, which corrects the influence of temperature on the dissolved oxygen value.
8. Physical measurement method; no electrolyte consumption and no periodic maintenance.
9. Unique protective cap design prevents the membrane from being damaged by impact with hard objects during use.
10. Special functional requirements can be customised.
| Measuring range | 0–20 mg/L or 0–20 ppm |
| Resolution | 0.01 mg/L or 0.01 ppm |
| Power supply | AC 220 V / DC 24 V, input power ≥ 5 W |
| Output | RS485, 4–20 mA, relay (optional), HART protocol (optional), NB / GPRS / LORA communication (optional) |
| Protection class | IP65 (controller) / IP68 (sensor) |
| Operating temperature | 0–60 °C (non-freezing) |
| Storage temperature | −10–60 °C |
| Installation | Top-mount / top flange / side-wall / pipe / immersion |
| Controller dimensions | Wall-mounted, 156 × 150 × 85 mm |
| Cut-out size | Wall-mounted, 156 × 94 mm |
| Cable length | 10 m standard (extendable on request) |
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