DO-702 uses fluorescence method to measure dissolved oxygen. The emitted blue light shines on the fluorescent layer, and the fluorescent substance is excited to emit red light. The oxygen concentration is inversely proportional to the time it takes for the fluorescent substance to return to the ground state. There is no oxygen consumption during measurement, the data is stable, the performance is reliable, there is no interference, and the installation and calibration are simple. Humanized sensing of dissolved oxygen data measured by sensors.
Function:% saturation concentration

Measurement range: 0.0 to 400.0, 0.00 to 40.00, 0.0 to 200.0 ug/L

Measurement resolution: 0.1 0.01/0.1

Measurement accuracy：±0.2 ±0.02

Temperature compensation method：Pt-1000/NTC22K

Temperature measurement range：-10.0 to+130.0 ℃

Temperature compensation range：-10.0 to+130.0 ℃

temperature resolution：0.1℃

Temperature Accuracy：±0.2℃

Range of electrode current measurement：-2.0 到 +400 nA

Accuracy of electrode current measurement：±0.005nA

Polarization voltage：-0.675V

Pressure adjustment range：500 to 9999mBar

Salinity compensation range：0.00 to 50.00 ppt

Ambient Temperature：0 to+70 ℃

storage temperature：-20 to+70 ℃

Display：Large backlit dot matrix LCD

Dissolved oxygen current output：1 Isolation type 4 to 20 mA Output, * large load 500 Ω

Temperature current output：2 Isolation type 4 to 20 mA Output, * large load 500 Ω

Accuracy of current output：±0.05 mA

RS485 Modbus RTU Standard Agreement

Communication speed 9600/19200/38400

Relay contact capacity 5 A/250VAC、5A/ 30VDC

Cleaning settings ON：1 Up to 1000 seconds OFF：0.1 Up to 1000.0 hours

A multifunctional relay：Cleaning/cycle alarm/error alarm

Relay delay action：0-120 seconds

Data recording：500000 transactions

Language selection：English/Traditional Chinese/Simplified Chinese

USB port：Record downloads and software updates (96 series does not have this feature)

protection grade：IP65

power：90 to 260VAC, power consumption<5 watts

Installation method：Panel installation/wall mounted installation/pipeline installation

weight：144 series 0.85kg, 96 series 0.55kg.