Product Description
Bluelab 4.0 pH Calibration Solution – 20 ml Single-Use Sachets
Achieve pinpoint pH accuracy with Bluelab's lab-referenced 4.0 pH calibration solution. Packaged in convenient single-use 20 ml sachets, this solution is engineered specifically for Bluelab pH meters, pens, and controllers — making it an essential tool for growers, lab technicians, and water quality professionals who demand reliable, repeatable results.
Why Calibrate with Bluelab 4.0 Solution?
Lab-Referenced Accuracy: Manufactured to high laboratory standards, ensuring your Bluelab instruments maintain long-term precision and consistency.
Single-Use Sachets: Eliminate cross-contamination risk — each 20 ml sachet is used once and discarded, preserving solution integrity every time.
Universal Bluelab Compatibility: Designed for all Bluelab pH-measuring products including the Bluelab pH Pen, Guardian Monitor, and Combo Meter.
Two-Point Calibration Ready: Pair with Bluelab 7.0 pH Calibration Solution for a two-point calibration — the gold standard for maximum pH accuracy.
Extends Probe Life: Regular calibration with genuine Bluelab solutions helps your probes last longer and read more accurately over time.
Ideal For
Hydroponics & indoor growing
Aquaculture & aquaponics
Laboratory water testing
Pool & spa water management
Industrial water treatment
Product Details
pH Value: 4.0 (acidic reference point)
Volume: 20 ml per sachet
Barcode (UPC): 09421024920340
SKU: BLU420
Country of Origin: United States
Pro tip: For the most accurate pH readings, perform a two-point calibration using both Bluelab 4.0 and 7.0 pH Calibration Solutions before every measurement session.
