Product Description
Bluelab pH 4.0 Calibration Solution – 18 ml Single-Use Sachet
Keep your pH meters, monitors, and pens reading accurately — every time. The Bluelab pH 4.0 Calibration Solution sachet delivers a precise acidic reference point for calibrating any pH testing device. Engineered for growers, lab technicians, and water quality professionals who can't afford a bad reading.
Picture calibration day in your grow room or lab: no measuring, no mess, no wasted solution. Just tear open a sachet, dip your probe, calibrate in seconds, and discard. Fresh, accurate buffer every single time — no contamination risk from shared bottles.
Key Features
✅ Precise pH 4.0 buffer — certified acidic reference point for accurate two- or three-point calibration
✅ Single-use 18 ml / 0.6 fl oz sachets — eliminates cross-contamination between calibrations
✅ Easy tear-open design — no scissors needed; calibrate anywhere in seconds
✅ Portable sachet format — perfectly sized for on-the-go calibration and field testing
␅ Compatible with all Bluelab pH meters, monitors, and pens — and any BNC or standard pH probe
✅ Made in New Zealand — Bluelab quality assurance
Technical Specifications
Brand
Bluelab
Solution Type
pH Calibration Buffer
pH Value
4.0 (acidic reference point)
Volume per Sachet
18 ml / 0.6 fl oz
Format
Single-use tear-open sachet
SKU
PH418B-1
Barcode
9421024921460
Country of Origin
New Zealand
When to Use pH 4.0 Buffer
pH 4.0 solution is the acidic calibration point used in two-point and three-point calibration routines. Use it alongside pH 7.0 (neutral) and optionally pH 10.0 (alkaline) buffer solutions for the most accurate calibration across your full measurement range. Calibrate before every use for best results.
Ideal Applications
Hydroponics and indoor growing — nutrient solution pH management
Aquariums and aquaculture — water quality monitoring
Laboratories and educational institutions
Environmental and field water testing
Food and beverage quality control
Compatible With
Works with all Bluelab pH meters, pens, monitors, and controllers, as well as any third-party pH probe or meter requiring a pH 4.0 calibration buffer.
Note: For best accuracy, use fresh solution for each calibration. Do not reuse sachets. Store in a cool, dry place away from direct sunlight.
