Innovative Technologies

Benchtop pH/DO Meter (QXM-PD751)

Benchtop pH/DO Meter (QXM-PD751)

Measurement range (-1.999~19.999)pH Resolution 0.1/0.01/0.001 pH Accuracy Electrode: ±0.002 pH, Meter: ±0.01 pH
Features
  • 6.5-inch LCD screen with concise and user-friendly interface.

  • Built-in microprocessor chip with intelligent functions such as automatic calibration, ATC, data storage, clock display, USB output, function settings, wireless printing, and self-diagnosis information.

  • Auto recognition of 25 buffers with three options: Europe & USA, NIST, and China.

  • Automatic temperature compensation, salinity compensation, and pressure compensation.

  • Polarographic DO electrode with short polarization time (3–5 minutes).

  • Wireless Bluetooth printing and real-time data transfer to mobile phone (optional).

  • Smart electrode status display for accurate usage.

  • Stores 1000 test data sets, exportable to USB and viewable in Excel.

Technical Specification

Specifications

pH

Parameter Specification
Measuring Range (-2.00 ~ 20.00) pH
Resolution 0.1 / 0.01 pH
Accuracy ±0.02 pH
Auto Calibration 1, 2, 3 point
Buffer Standards Europe & USA, NIST, China
Input Current ≤1×10⁻¹² A
Input Impedance ≥3×10¹² Ω
Stability ±0.01 pH / 3h
Temp. Compensation (0 ~ 100)℃, auto or manual

mV

Parameter Specification
Measuring Range -1999.9 mV ~ 0 ~ 1999.9 mV
Resolution 1 mV
Accuracy ±0.1% FS

Dissolved Oxygen (DO)

Parameter Specification
Measuring Range (0–20.00) mg/L (ppm), (0–200.0)%
Resolution 0.1 / 0.01 mg/L (ppm), 1 / 0.1 %
Accuracy Electrode: ±0.10 mg/L, Meter: ±0.40 mg/L
Response Time ≤30 s (25℃, 90% response)
Residual Current ≤0.1 mg/L
Temp. Compensation (0 ~ 45)℃, auto
Salinity Compensation (0 ~ 45) ppt, auto
Pressure Compensation (80 ~ 105) kPa, auto
Auto Calibration Air saturated by water / water saturated by air
Electrode Type Polarographic

Temperature

Parameter Specification
Measuring Range (-10 ~ 110)℃
Resolution 0.1℃
Accuracy ±0.5℃

🧾 Other Details

Category Specification
Display 6.5-inch LCD screen
Data Storage 1000 sets
Power 12V / 1A
Output USB
Ambient Temperature 5 ~ 35℃
Ambient Humidity ≤85%
IP Grade IP54
Dimensions / N.W. 215 × 170 × 37 mm / 600 g
Shipping Size / G.W. 470 × 430 × 72 mm / 3 kg

📦 Standard Accessories

  • pH electrode

  • DO electrode

  • Temperature probe

  • pH buffer solution

  • DO filling solution

  • Power adapter

  • Manual