Extech SDL100 pH / ORP Meter Datalogger

Accurately measures pH, ORP and temperature and stores results on a memory card in Excel format ready for PC transfer.
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Extech SDL100 pH / ORP Meter Datalogger

The Extech SDL100 pH Meter displays and stores pH and ORP readings, perfectly suited to lab applications such as measuring pH of processed liquid samples. ORP = Oxidation Reduction Potential (Redox)

The supplied temperature probe enables the SDL100 to provide automatic temperature compensation for increased accuracy of pH meter readings.

The Extech SDL100 pH/ORP meter is capable of storing up to 99 results manually, while the supplied 2GB SD card allows up to 20M readings to be stored and transferred to a PC for viewing and analysis. In addition, the RS232 port allows data streaming directly to a PC. ORP stands for Oxidation Reduction Potential.

Extech SDL100 pH/ORP/Temperature Datalogger Features:

  • Dual display of pH or mV and Temperature
  • ATC or manual Temperature compensation
  • 3 point calibration ensures the best linearity and accuracy
  • Large backlit dual LCD
  • Stores 99 readings manually and 20M readings via 2G SD card
  • User programmable sampling rate
  • Built-in PC interface
  • Min/Max and Data Hold functions, Auto power off

What's In The Box?

  • Extech SDL100 pH/ORP Meter
  • Mini pH Electrode
  • Thermistor Temperature Probe
  • Sample Buffers
  • 2GB SD Memory Card
  • 6 x AA Batteries
  • Hard Cary Case


  • Range: 0 - 14pH
  • Resolution: 0.01pH
  • Accuracy ±(0.02pH + 2 digits)

ORP (Oxidation Reduction Potential)

  • Range: -199mV - 1999mV
  • Resolution: 1mV
  • Accuracy: ±(0.5% + 2 digits)


  • Range: 0 - 65°C
  • Resolution: 0.1°C
  • Accuracy: ± 1°C
  • Memory: 20M data records using supplied SD memory card
  • Dimensions: 182 x 73 x 47.5mm
  • Weight: 455g