BLUELAB pH 4 Calibration Fluid 250ml

Description

Bluelab pH 4 Calibration Fluid serves as the slope buffer in the standard two-point pH calibration process for Bluelab pH pens, probes, and meters, following the initial pH 7.0 buffer step. Key Features This NIST-traceable solution provides a precise pH 4.0 reference at 25°C, ensuring accurate readings and extending the life of pH electrodes through regular use. It's formulated specifically for Bluelab products, appearing as a red-colored liquid for easy identification. Usage Guidelines Clean the pH probe first, then immerse in a small amount of fresh solution—discard used portions to prevent contamination, and store the bottle sealed in a cool, dark place. Available in 250 ml or 500 ml sizes, calibrate regularly (e.g., weekly) for hydroponics or nutrient solutions.