Optical dissolved oxygen sensors use the internationally leading fluorescence technology, which is based on the physics principle of quenching of active fluorescence by specific substances. The significant advantages of this fluorescence method of measuring dissolved oxygen are that it does not consume oxygen, has no flow limitation, does not require preheating of the electrolyte, and requires no maintenance and frequent calibration. It is also unaffected by hydrogen sulfide interference and offers excellent accuracy and stability. The sensor also has a built-in temperature sensor for automatic temperature compensation.

Product Features

✅Digital output, support RS485 / MODBUS.

✅No membrane，No electrolyte, No chemical  interference, No frequent calibration required. No oxygen consumption, No flow dependent.

✅Low maintenance costs.High measurement accuracy.

✅High durability,wide range of applications.

Technical parameter

Name	Optical Dissolved oxygen sensor
Principle	Fluorescence
Range	0-50mg/ L or 0-500 % saturation
Measurement accuracy	0-20mg/L: ±3%   ＞20mg/L: ±10%
Response time	60s
Maximum depth	30m
Temperature range	0 ~ 50℃(non-freezing)
Temperature accuracy	±0.5℃
Sensor interfaces	RS-485, MODBUS protocol
Power Requirements	DC 9~24V，current <50mA
Construction	M22*1.5(optionally convertible to NPT3/4 thread), submersible installation
Sensor size	Φ22mm*152.7mm
Probe cable length	5m (default), customizable
Calibration	One-point or two-points calibration
Fluorescent cap life	1 Year ( at normal use)
Body materials	316L / Ti

Product Advantages