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Published product information, with original specification labels and units. A missing specification is unknown, not proof that a feature is absent.
Buying decisionApera Instruments

Apera EC20 Conductivity Tester Kit, AI212

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Useful forRecording hydroponic conductivity in µS/cm or mS/cm without depending on a ppm conversion.
Check firstDoes not measure pH or display individual nutrient concentrations.
Published specifications
Model / SKU
EC20 / AI212
Range
0–20.00 mS/cm across automatic µS/cm and mS/cm ranges
Resolution
0.1 or 1 µS/cm; 0.01 mS/cm, depending on range
Accuracy
US product specification: ±1% F.S.; European v2.2 manual adds ±1 digit
Calibration
Automatic 1–2 points: 1413 µS/cm and 12.88 mS/cm
Temperature
0–50°C; 0.1°C resolution; ±0.5°C accuracy
Temperature compensation
Automatic, 0–50°C
Probe
Nonreplaceable brush-resistant platinum-black conductivity sensor
Power
4 AAA batteries
Housing
IP67
Care distinction
Rinse after testing; EC20 manual describes conditioning in 12.88 mS/cm standard after long disuse, not pH-style KCl storage
Other tradeoffs
  • Accuracy is specified against full scale, not as ±1% of every reading.
  • Conductivity electrode is fixed and cannot be replaced separately.
  • US specification and European manual differ slightly in accuracy notation; confirm the supplied manual for the purchased unit.
Sources & model detailsPublished product source ↗

Researched 2026-09-14.

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