Lowest Price for Ro Micro Computer Controller - Dissolved Oxygen Controller – JIRS

Description ■ DO-6850 online Dissolved Oxygen Temperature Transmitting Controller is a micro computerized precision instrument. ■ The large LCD display, English menu operation. ■ Multi-parameter display at the same time: the value of dissolved oxygen, temperature, output current, alarm points, etc. Intuitive and easy to read, and alarm for range over run ■ Screen displays alarm status and accompanied by a switch ON / OFF signal output. ■ Automatic Temperature Compensation: Automatic 0℃ to 60℃. ■ Communication function (optional): RS-485 communication interface (MODBUS protocol is partially compatible), 4 to 20 mA current output corresponding to the DO value can be set freely. ■ Notepad: can store 50 measurements, the user can record measurement data. ■ Hysteresis amount can be set freely to avoid frequent switching relay action. ■ Watchdog function: to ensure that the instrument will not crash. ■ Core devices from famous foreign brands. ■ Restore the factory settings. Power-down protection> 10 years. Main technique Specification

 Function Model

DO-6800A, B, C

online Dissolved Oxygen Temperature Transmitting Controller

Measuring Range

0.00 - 20.00 mg /L (ppm)

0 - 200.0 ug /L (ppd), (optional)

0-60℃, 0-100℃ (optional)


0.1 ug/L,

0. 01 mg/L,



ug/L: ±1.0%FS;




Large Screen Multi-parameters LCD

Temp. Compensation

NTC 10K, 0.0℃-60.0 ℃, 0-100℃ (optional),

Automatic temperature compensation

Current output

isolation to protect, 4 ~ 20mA signal output

Control output

two sets of ON / OFF relay contacts, divided into the high

point, low alarm signal, optically isolated output. 

Communication output

Standard Modbus RS485 function to PC (optional)

Contact capacity

10A/220V AC (Resistive Load)

Output load

load <500Ω (0-10mA), load <750Ω (4-20mA)


AC 220V±10%, 50/60Hz

Working environment

Ambient Temp. 0-60℃, Relative Humidity ≤90%


96×96×115mm(H X W X D), 0.9kgs

Hole size

91×91mm H X W)

Installation Mode

Panel Mounted

Protection grade

IP57 or IP 65 cover

Application Widely used in the detection and control of dissolved oxygen in various water treatments, boiler water deoxygenization, environmental monitoring, aquaculture and other fields.