The Atlas Scientific pH 4.00 Calibration Solution - 125ml (4oz) is meticulously crafted through a four-stage process to ensure exceptional accuracy. This solution is standardized against NIST-certified references, making it suitable for use with any pH probe. It maintains a precision of ±0.02 pH at 25°C, ensuring reliable calibration results. With a shelf life of two years at room temperature, it offers long-term usability for precise pH measurements.
