Dissolved Oxygen Range: 0.00–20.00 mg/L (0.0–200.0%)
Resolution & Accuracy: 0.01 mg/L; ±0.05 mg/L
Temperature Range: 0.0–100.0℃, Accuracy ±0.2℃
Compensation: Automatic temperature, salinity (0–40 g/L), and atmospheric pressure (700–1400 mbar)
Calibration: 1 or 2 points (100% saturated oxygen / 0% oxygen-free)
Power Supply: 1 × 1.5V AAA battery, easy replacement
Waterproof Rating: IP65, portable pen-type design
 

Measuring Range: 0–20 mg/L or 0–200% saturation, Accuracy: ±0.3 mg/L or ±5%
Fluorescence burst principle, green LED excitation, maintenance-free, no oxygen consumption
Built-in temperature sensor with automatic compensation, Response Time: 90s
Communication: MODBUS/RS485; intelligent diagnostic outputs
Material: 316L stainless steel, IP68, max depth 10 m underwater, easy installation
Power: 12–24V DC, Power Consumption: 0.3 W
Calibration: Zero, Oxygen Saturation, Low Concentration, Slope Calibration
 

Simultaneously detects 12 water quality parameters including residual chlorine (0-3 mg/L), pH (6.5-9.0), dissolved oxygen (0-20 mg/L), ammonia nitrogen (0-5 mg/L), phosphate (0-2 mg/L), copper (0-2 mg/L), and hexavalent chromium (0-2 mg/L).
Uses advanced German optical structure with imported high-brightness quasi-parallel LED cold light source for precise and stable measurement.
Supports multi-wavelength detection at 420nm, 470nm, 520nm, and 620nm for diverse parameter analysis.
Waterproof design (IP65), built-in 2500mAh rechargeable lithium battery, and storage of up to 5000 test results.
Compact size: 170×72×44mm, lightweight at 277g, portable with user-friendly OLED display and 5-key operation.
 

Measurement Range: 0-20 mg/L dissolved oxygen or 0-200% saturation
Accuracy: ±1% with resolution of 0.01 mg/L
Response Time: 10 seconds
Sensor Protection: IP68 waterproof sensor, IP67 instrument
Data Storage: Supports up to 50,000 measurements
Power Supply: USB charging & 4 x AA batteries
Display: 3.3-inch monochrome LCD with backlight
 

Parameters Measured: pH, dissolved oxygen (DO), conductivity, turbidity
Display: 3.3-inch monochrome LCD
Dual power supply: Li-ion battery and NiMH battery with USB charging
Protection Class: IP67 waterproof for field use
Data Storage: Automatic interval and locked data saving
GPS Function: Real-time coordinate positioning and data tagging
Dimensions & Weight: 200 × 101 × 36 mm, 420 g