Mastertronic Automated Water Tester (OPEN BOX)

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The Mastertronic is the latest addition to Focustronic's suite of water testing equipment. It is a standalone machine with the ability to accurately measure Nitrates, Phosphates, Magnesium, Calcium, Alkalinity, and organic matter in aquariums.

  • Automatically measures and records important water parameters
  • High precision stepper and DC pumps
  • State-of-the-art colorimetric photosensor
  • Easy-to-use iOS and Android App
  • WiFi connectivity
  • Communicates with Alkatronic, Dosetronic, Solartronic, and Powertronic


* Test Kit Reagents Sold Separately

** iOS or Android App Required for use (Android requires Bluetooth 4.2 or above)




  • Dimensions: 13"L x 8.9"W x 13.6"H
  • Accuracy / Precision (+/-)
    • NO3: 0.5 ppm / 0.1 ppm
    • PO4: 0.01 ppm / 0.005 ppm
    • Mg: 20 ppm / 20 ppm
    • Ca: 6 ppm / 6 ppm
    • dKH: 0.1 dKH / 0.05 dKH
  • Connectivity: Cloud, App
  • Software: iOS app, Android app, wifi based
  • Standalone: Yes
  • Dosetronic Compatible: Yes. Wireless communication with Dosetronic making it possible to alter the schedules in Dosetronic in desired channels based on measurements from Mastertronic.
  • Socket Communication: Yes. Wireless communication with Focustronics sockets, making it possible to control socket on-off based on measurements from Mastertronic.



Compatible Test Kits
Nitrite Fauna Marine (NO2/NO3), Tropic Marin
Nitrate Fauna Marine (NO2/NO3), Tropic Marin
Phospate Red Sea Pro
Calcium API, API Low Range
Magnesium Red Sea Pro, Giesemann, Giesemann Low Range, Colombo, Colombo Low Range
Iodine Giesemann, Colombo
Ammonia JBL
Iron JBL
Alkalinity Salifert



What's Included?
3x External hoses (2 meters in length each)
1x Needle stabilizer
1x AC/DC adapter
2x Microfilter
2x Magnetic stirring bars
Needles and syringes

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