JJF 1949-2021 《Calibration Specification for Water Hardness Meters》 Related products

JJF 1949-2021 "Water hardness gauge calibrating specification" is China's national technical specification for Measurement, which is suitable for calibrating desktop and portable water hardness gauges based on Colorimetry and electrode principles. The specification specifies the measurement characteristics, calibrating conditions, items and methods of hardness gauges, including error of indication, repeability, temperature error of indication, etc., to ensure the accuracy and reliability of water hardness measurement, suitable for food, medicine and health, environment protection and chemical industry.