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Water hardness is a critical factor that affects household appliances, industrial systems, and even aquaculture operations. Measuring water hardness accurately helps prevent scale buildup, ensures effective water treatment, and protects your plumbing and equipment. In this guide, we explore the best ways to check water hardness and highlight how the ERUN-SP9 portable multi-parameter water quality detector simplifies the

Heavy metals in water, such as zinc (Zn), copper (Cu), nickel (Ni), chromium (Cr), and ammonium, pose serious risks to human health and aquatic ecosystems. Prolonged exposure, even at low concentrations, can lead to organ damage, neurological disorders, and environmental contamination. For industries, municipalities, and researchers, monitoring heavy metals is essential to ensure compliance with safety