Industrial Online Dissolved Oxygen Analyzer DO Oxygen in Water
Controller
>>Overview
The industrial online dissolved oxygen analyzer is a
microprocessor-based water quality online monitoring and control
instrument. Equipped with polarographic dissolved oxygen electrodes
or fluorescence dissolved oxygen sensors, this instrument is widely
used across various industries including power plants,
petrochemicals, metallurgy, electronics, mining, paper
manufacturing, bio-fermentation, pharmaceuticals, food &
beverage, environmental water treatment, and aquaculture. It
provides continuous monitoring and control of dissolved oxygen
levels and temperature values in aqueous solutions.
>>Features
• Dot-matrix LCD display
• Smart menu operation
• Multiple automatic calibration functions
• Versatile signal output options, 4-20mA, RS485
• Data recording & curve display
• Differential signal measurement mode for stable and reliable performance
• Manual/automatic temperature compensation
• Relay control switches
• High/low limits with hysteresis control
• Simultaneous display of main Parameter, temperature, and status on the same interface
• Password protection to prevent unauthorized operation
>>Technical Parameter
Controller Type | 98*98cm black and white version | 98*98cm colorful version | 144*144cm black and white version | 144*144cm colorful version |
Measurement Range (depends on electrode) | DO: 0～20.0mg/L；0～200% Temperature: -10~150.0 °C; |
| Resolution | DO: 0.01mg/L；0.1%； Temperature: 0.1 °C; |
| Basic Error | DO: ±1%F.S Temperature: ±0.3°C |
| Response time | 25°C＜60S；35°C＜30S； |
| Stability | Under normal pressure and constant temperature, drift<2% F.S per
week; |
| Current Output | 0/4-20 mA (load resistance <750 Ω) 20-4 mA (load resistance <750 Ω) (1 channel standard, 2 channels optional) | 0/4-20 mA (load resistance <750 Ω) 20-4 mA (load resistance <750 Ω) |
| Communication Output | RS485 MODBUS RTU |
Dual Relay Control Contacts | 2Sets 3A 250V AC, 3A 30V DC | 3Sets 5A 250V AC, 3A 30V DC |
| Power Supply (optional) | 85-265 VAC ±10%, 50±1 Hz, ≤3W 9-36 VDC, ≤3W |
| Historical Data | NO | NO | Yes | Yes |
| Data Trend Chart | NO | NO | NO | Yes |
| Dimensions | 98 × 98 × 130 mm | 144 × 144 × 118 mm |
| Installation | Panel-mounted or wall-mounted, Panel cutout: 92.5 × 92.5 mm | Panel-mounted or wall-mounted, Panel cutout: 137 × 137 mm |
| Protection Rating | IP65 |
| Weight | 0.6 kg | 0.8 kg |
Operating Environment | Temperature: -10 to 60°C Humidity: ≤90% RH No strong magnetic interference except Earth’s natural field |
