EC Calibration Standard Solution 2.76 mS/cm — 300ml

EC Calibration Standard Solution — 2.76 mS/cm, 300ml

A 2.76 mS/cm conductivity standard solution for calibrating EC meters — the higher of the two commonly-used calibration points (alongside 1.413 mS/cm). Regular calibration is the one step most growers skip — and the reason their EC readings slowly drift out of accuracy. A few minutes' calibration every couple of weeks keeps your EC meter reading truthfully.

Why growers need EC calibration solution:

• Calibrates EC meters to known reference — 2.76 mS/cm is the industry-standard higher calibration point
• Essential for meter accuracy — uncalibrated EC meters drift over time, giving false readings
• Pair with 1.413 mS/cm solution — two-point calibration is more accurate than single-point
• 300ml bottle — enough for many calibration sessions, doesn't go off quickly if stored sealed
• Works with all EC meters — Bluelab, Hanna, generic — conductivity is universal
• Recommended every 2-4 weeks — standard practice for any serious hydroponic grower

Who it's not for:

Don't reuse solution after the probe has been dipped — pour a small amount into a separate container, calibrate, then discard. Contaminated solution gives bad calibration. Keep bottle sealed between uses; air exposure degrades accuracy over months. For most accurate calibration, use fresh solution rather than stored-for-years bottles.

In stock now — ships same working day from our Staffordshire warehouse with free UK delivery over £100. Pick up in-store at our Stone shop (ST15 0SR) if you're local, or click & collect at checkout.