The DO-200 Dissolved Oxygen Meter is an online intelligent dissolved oxygen detection instrument produced by our company using imported technology. It utilizes imported components and dissolved oxygen membrane heads, combined with advanced production processes and surface-mount technology, ensuring long-term stable and reliable operation. The instrument automatically detects electrode zero point and slope limits; optocoupler isolation protects the 4–20mA signal output, with no interference between input and output signals; EEPROM memory requires no backup battery, retaining data after power loss; low temperature drift, stable and accurate; uniquely designed operation menu avoids complicated user operations, providing unparalleled convenience; large-screen multi-parameter (dissolved oxygen value, temperature, output current, etc.) LCD backlight display, intuitive and easy to read; backlight automatically turns off after three minutes of no button operation, saving power and extending instrument lifespan; adjustable screen contrast levels; high and low alarm points can be freely set; the screen directly displays alarm status with simultaneous ON/OFF signal output; hysteresis setting function prevents frequent relay switching; optional RS485 communication; waterproof, gas-proof, fully sealed flame-retardant housing with IP65 protection rating, suitable for use in harsh environmental conditions. Widely applicable for continuous monitoring of dissolved oxygen in chemical fertilizers, metallurgy, environmental water treatment engineering, pharmaceuticals, biochemistry, food, aquaculture, tap water, and other solutions.

Technical Parameters:
Measurement Range: 0.00–20.00 mg/L
Temperature Compensation Range: Automatic 0–60°C
Resolution: 0.01 mg/L
Accuracy: ±1.5% FS
Current Isolation Output: 4–20 mA (Load < 500 Ω)
Alarm Relay: AC220V, 3A, isolated alarm signal output
Protection Rating: IP65
Power Supply: AC230V±10%, 50/60Hz
Operating Conditions: Ambient temperature 0–60°C, relative humidity ≤80%, no strong magnetic field interference except Earth's magnetic field
Data Retention After Power Loss: >10 years
Weight and Dimensions: 1 kg, 96×96×145 mm
Panel Cutout Dimensions: 92×92 mm
Secondary Meter Installation: Panel-mounted
Electrode Installation: Submersible/Pipeline type
Electrode Option: Polarographic Electrode

Standard Configuration:
One secondary meter, two fixing lock strips, one user manual, one electrode.
Application Fields: Power plants, chemical industry, environmental water treatment, biological fermentation, aquaculture, pharmaceuticals, and other industries.