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Key Advantages:

Smart sensor retains all calibration in the sensor

Membrane less, no electrodes design

Flow Independent and No oxygen consumption

No warm-up time required

Easy to store, air or water are all ok

User-replaceable sensor cap

Low drift and long life time

Low cost, all made in China, including fluorescent film

Digital output, support RS485 Modbus protocol

POM, SS316, TA body are selectable

Support leakage alarm and salinity compensation

Item Technical Specification
Measurement Method luminescence quenching technique
Range 0-20mg/L or 0-200% Air Sat.
Resolution 0.01mg/
Accuracy DO +/-0.3mg/L, Temperature +/-0.3℃(0~45℃)
Operating temperature 0~45℃
Storage Temperatur -10~50℃
Min. Detection Limi 0.05mg/L
Warranty 1 year
Depth IP68, 10m Max
Power DC 5~12V 15mA (normal)
Output RS485 and Modbus protocol
Material Titanium, SS316(default), POM, Nylon
Dimension Length 170.5mm, diameter 22mm
Flow rat < 3 m/s
Response tim Minimum 45s T90
Field life* Sensor 2 years or greater, sensor cap 1.5 years or greater
Recommended Calibration maintain Frequency* Sensor 6 months
Note: *Field life and calibration frequency dependent on site conditions

Optical DO Sensor

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Optical DO Sensor

The Broadsensor optical DO sensor is coated with a luminescent material. Blue Light from an LED strikes the luminescent chemical on the sensor. The luminescent chemical instantly becomes excited and then as the excited chemical relaxes, it emit red light. The red light is detected by a photo diode. The time it takes for the chemical to return to a relaxed state is measured by referring an independent red led light. Oxygen has a dampening effect on this reaction. The oxygen concentration is proportional to the time it takes for the luminescent material to return to a relaxed state.