IONICS pH 4.01 Calibration Buffer Solution — 300 ml for pH Meters in Hydroponics

In stock In stock - Express shipping available Shipping within 24H

€5.90 Tax included

ALMA Payez en 3, 4 ou 10x par CB, PayPal ou virement

Shipping within 24H

Conditioning: 250mL

CB PayPal Virement Alma 3/4/10x · paiement sécurisé

Free delivery
Take advantage of free home delivery in France from 100 € of purchase

Secure payment
Pay securely and pay by credit card in installments from €100 to €3,000

Secure parcels
The boxes we ship are all of high quality

Customer service
Contact us via chat, phone, email, Facebook, Instagram and TikTok

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.

IONICS pH 4.01 calibration buffer 300 ml for pH meters BloomLED

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

Specific References
EAN13	5025644918073

Reference IONICS-PH4-250ML

Condition New

Product IONICS pH 4.01 Calibration Buffer Solution — 300 ml for pH Meters in Hydroponics ideal for professional use, personal use, performance. Quality and performance guaranteed.