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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 decision	Apera Instruments Apera EC20 Conductivity Tester Kit, AI212 Check price on Amazon (paid link) Amazon affiliate link
Useful for	Recording hydroponic conductivity in µS/cm or mS/cm without depending on a ppm conversion.
Check first	Does 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 details	Published product source ↗ Researched 2026-09-14. Full profile and supporting sources →
Put it to use	Hydroponics guides and equipment → Hydroponic Lettuce: Choose the Harvest, Then Plan Each Crop Stage Hydroponic Basil: Make Room for the Canopy You Will Keep Harvesting Hydroponic Tomatoes or Peppers: Check the Upgrade Before Replacing Your Greens
Check current offer	Check price on Amazon (paid link)

These profiles summarize published information, not hands-on testing. Different products may serve different roles. Check matching measurements, the exact model and pack, and current seller terms. This comparison does not certify system compatibility or show live prices or stock.

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Apera EC20 Conductivity Tester Kit, AI212