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Table of Contents Dissolved oxygen (DO) refers to the amount of oxygen dissolved in water. It is expressed as the mass of oxygen per liter of water, typically in milligrams per liter (mg/L). Dissolved oxygen exists in water in molecular form. In water that are not polluted by oxygen consuming substances, mainly organic matter, dissolved […]

Table of Contents In our daily lives, air itself exerts pressure, known as atmospheric pressure. Living at the Earth’s surface, we have become accustomed to this pressure and often do not perceive its presence. This invisible and intangible physical quantity, however, is ubiquitous in both our daily life and industrial activities. From inflating tires to

Table of Contents Have you ever faced unexpected equipment failures that forced production to halt? Or struggled with high repair costs and unplanned downtime? Predictive maintenance (PdM) offers a proactive approach to safeguarding your machinery. By deploying real-time condition sensors on every piece of equipment and integrating temperature or vibration data with AI-driven analytics, predictive

Table of Contents In industrial applications, motors serve as the primary driving force behind a wide range of machinery. Any malfunction can result in production downtime and significant losses. According to data from the Electric Power Research Institute (EPRI) and the Construction Specifications Institute (CSI), implementing condition monitoring and fault diagnostics for electrical equipment can

Table of Contents Three Main Types of Rain Gauges Rain gauges are essential instruments for accurately measuring precipitation and are widely used in meteorological monitoring, environmental research, and hydrological analysis. Based on their working principles and structural design, rain gauges can be classified into three main types: tipping bucket, optical, and piezoelectric rain gauges. 1.

Table of Contents In various fields such as water quality monitoring, drinking water safety, and marine research, total dissolved solids (TDS), electrical conductivity (EC), and salinity are among the most commonly used water quality parameters. Although all three reflect the concentration of dissolved ions in water, they differ in meaning, calculation methods, and application scenarios.

Table of Contents The root system of a plant can be compared to a discerning gourmet, while the soil serves as its private kitchen. Within this kitchen, soil pH plays a critical role—it determines which “nutrients” are readily available and which remain locked away. When the pH level is unbalanced, even the most fertile soil

Table of Contents Whether you have just moved into a new home or want to gain a deeper understanding of the safety and purity of your household drinking water, it is essential to know how to conduct water quality testing. Although a wide range of home water testing kits are available on the market, these

Table of Contents Did you know that most people spend about 90% of their time indoors? While we often worry about outdoor air pollution, the air inside our homes, schools, and offices can be significantly more polluted. This is the critical issue of indoor air quality (IAQ), and it has a direct impact on our

Table of Contents What is Heat Flux? Heat flux, also known as heat flow density, refers to the amount of heat transferred per unit area per unit time. It is a physical quantity that describes the rate and direction of heat transfer. In the International System of Units (SI), the unit is watts per square