pH 4.01 Calibration Solution 500 ml

Unlock Your Pot-tential with pH 4.01 Calibration Solution 500 ml

Low pH calibration is essential for South African hydroponic, coco, soil and fertigation growers — acidic nutrients, organic amendments or drift in recirculating systems can push readings below 5.5, locking out iron, manganese, phosphorus and zinc before visible tip burn or chlorosis appears. The pH 4.01 Calibration Solution 500 ml provides a generous, NIST-traceable buffer (exactly 4.01 at 25 °C) to anchor the acidic end of your meter’s range for reliable two-point calibration. Temperature-compensated values from 0–60 °C allow precise adjustments for your grow-room conditions (e.g., 4.00 at 20 °C, 4.03 at 40 °C). Close the bottle immediately after each use to maintain stability, and store between 15–25 °C away from sunlight — no contamination when handled properly. The 500 ml size offers excellent value for frequent or daily calibrations across multiple pens, handheld meters or controllers like the P50 Pro2, P110 Pro2, P160 Pro2 or C800 Pro. Sustainable, high-precision calibration that keeps your pH locked in the optimal 5.8–6.2 zone for maximum nutrient availability, healthier roots and bigger, better-quality harvests.

Key Features

• NIST-traceable pH 4.01 buffer – lab-grade accuracy for low-range calibration
• 500 ml bottle size – high-volume & economical for frequent or multiple-meter use
• Temperature compensation table – precise values from 0–60 °C for real grow-room conditions
• Multi-use format – reseal immediately after each calibration to preserve integrity
  
• Store 15–25 °C – stable & long-lasting when kept away from heat & direct light