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IONICS pH 4.01 Calibration Buffer Solution — 300 ml for pH Meters in Hydroponics
€5.90
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Trustworthy pH readings, every feed — calibrate your pH meter in 30 seconds with a certified pH 4.01 reference buffer.
Hand-picked by BloomLED, the indoor-growing specialist with 10+ years of expertise, designed in France.
pH 4.01 · 300 ml · 10–15 calibrations · IONICS
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PH CALIBRATION
IONICS pH 4.01 Buffer 300 ml: the foundation of an accurate pH meter
A pH meter is only as good as its last calibration. The IONICS pH 4.01 buffer solution provides the low-end reference required for any reliable two-point calibration (paired with a pH 7.01 buffer). A 30-second routine that protects nutrient uptake and yield in your indoor garden.
Technical specifications
| Specification | Value |
|---|---|
| pH (at 25°C) | 4.01 ± 0.02 |
| Volume | 300 ml |
| Calibrations available | 10 to 15 |
| Packaging | Sealed bottle with dosing cap |
4.01pH reference
300ml
15calibrations
🎯 Lab-grade accuracy
Stabilised buffer at 4.01 ± 0.02 pH at 25°C. Compatible with the calibration standards of all professional and consumer pH testers.
💧 Practical format
300 ml bottle with dosing cap: pour just what you need, reseal and store. Easily covers a full season of indoor growing.
🌱 Essential for hydroponics
Water and nutrient solutions drift in pH fast. A weekly to bi-weekly calibration safeguards nutrient assimilation and final yield.
How often should I calibrate my pH meter?
For serious indoor growing, calibrate every 1 to 2 weeks, and always after replacing the probe or after long storage. A drift of just 0.3 pH can block iron or calcium uptake.
Can I reuse the buffer after calibration?No. Once your probe has touched it, the solution is contaminated and loses its reference value. Pour only the small amount needed into a clean cup, then discard. That is exactly why 300 ml lasts 10–15 calibrations.
Combined with a pH 7.01 IONICS or other-brand buffer, this solution unlocks two-point calibration — the only reliable method to keep readings accurate in hydroponic culture.
✓ 24h dispatch✓ Expert advice✓ Designed in France
IONICS-PH4-250ML
Specific References
- EAN13
- 5025644918073
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Trustworthy pH readings, every feed — calibrate your pH meter in 30 seconds with a certified pH 4.01 reference buffer.
Hand-picked by BloomLED, the indoor-growing specialist with 10+ years of expertise, designed in France.
pH 4.01 · 300 ml · 10–15 calibrations · IONICS