SKU: 06028000053

AquaMaster S300 Pro 2 Substrate pH/Temp Meter

Vendor Aquamaster
Regular price $183.95
Sale price $183.95 Regular price
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Why Choose AquaMaster S300 Pro 2?

The AquaMaster S300 Pro 2 is a professional-grade, waterproof pH meter that accurately measures both pH and temperature of water. It is easy to use, with a large LCD screen and intuitive interface. It is a must-have tool for anyone who needs to regularly monitor and maintain water quality, whether in an aquarium, pool, or spa.


The AquaMaster S300 Pro 2 is built to last, with a rugged, sealed design that can withstand harsh environments. Its replaceable sensor probe ensures that it stays accurate and reliable even after years of use. Its automatic temperature compensation feature provides accurate pH readings even in fluctuating temperatures.


The AquaMaster S300 Pro 2 is also versatile, with a range of pH measurement from 0 to 14 and a temperature range of -5°C to 110°C. This makes it suitable for use in a wide range of aquatic applications, such as aquaculture, hydroponics, and environmental monitoring.


With the AquaMaster S300 Pro 2, you can easily and quickly get accurate pH and temperature readings, thus ensuring optimal water quality for your fish, plants, or other aquatic organisms.

How does the meter work?

  • Connect the BNC connector of the electrode to the pH meter and remove the protective cap containing storage solution from the electrode
  • Rinse the electrode with running water and dry it using clean kitchen paper
  • Press the on/off button to turn on the meter
  • Place the electrode in the (soft) substrate (make sure the substrate is well wet/damp, otherwise the meter will not work properly) or liquid to be measured
  • Wait for the value to stabilise. The measurement is now complete
  • Press the HOLD button to save the measurement. Do not forget to press the HOLD button again when the meter is used once more
  • Rinse the electrode with clean water after use, so that no residue is left on the electrode. Replace the electrode in the protective cap containing the storage solution
  • Press the on/off button to turn off the meter

We recommend storing the meter with KCI storage solution in the protective cover.

This package contains:

  • 1x Digital Substrate pH/Temp meter S300 Pro 2
  • 1x User Manual


  • Range: pH: 0.0 ~ 14.0 pH / Temp.: 0°C ~ 50°C (32°F ~ 122°F)
  • Resolution: pH: ± 0.1 pH / Temp.: 0.1 ºC (1.0 ºF)
  • Accuracy: pH: ± 0.1 pH / Temp.: ±0.5°C (32°F) / Temp. compensation: 0°C - 50°C (32°F - 122°F)
  • Calibration: pH: 2 point auto 4.0 - 7.0 pH
  • Features: Battery indicator & automatic temp. compensation
  • Power supply: 3 × 1.5 Volt AG-13 button cell battery (included)
  • Auto. power-off: After 8 minutes
  • Calibration indicator: With correct calibration
  • Waterproof: IP65 (electrodes are IP67 waterproof)
  • Dimensions: 8.66" x 1.57" x 1.57"
  • Weight: 0.35 lbs