Optical Dissolved Oxygen Sensor

Product Name: Optical Dissolved Oxygen Sensor
Product brand：FLUIDINGS

The Fluidings 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.

Features of Optical Dissolved Oxygen Sensor

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
All made by Broadsensor, including fluorescent film
Support leakage alarm and salinity compensation
Digital output, support RS485 Modbus protocol
POM, SS316, TA body are selectable

Measurement Method	luminescence quenching technique
Range	0-20mg/L or 0-200% Air Sat.
Resolution	0.01mg/L
Accuracy	DO±0.3mg/L, Temperature ±0.3℃（0~45℃）
Operating temperature	0~45℃
Storage Temperature	-10~50℃
Min. Detection Limit	0.05mg/L
Warranty	1 year
Depth	IP68, 10m Max
Power	DC 5~12V 15mA (normal)
Output	RS485 and Modbus protocol
Materials	Titanium, SS316(default), POM
Dimensions	Length 186mm, diameter 22mm
Flow rate	< 3 m/s
Response time	Minimum 45s T90
Field life*	Sensor 2 years or greater, sensor cap 1.5 years or greater
Recommended Calibration maintain Frequency *	Sensor 6 months