Differences Between Hot Water Meters and Cold Water Meters

Water meters are essential devices for measuring water flow, categorized into hot water meters and cold water meters based on application scenarios. They differ significantly in materials, performance, and usage environments.

: Designed for high temperature water, it can usually measure hot water from 30°C to 90°C, and some models can withstand higher temperatures.

: Designed for high-temperature water, typically measuring water between 30°C and 90°C, with some models capable of withstanding higher temperatures.

：Applicable to low temperature water between 0.1°C and 30°C. If used in high temperature environment, it may cause measurement error or damage.

: Suitable for low-temperature water between 0.1°C and 30°C. Using them in high-temperature environments may cause measurement errors or damage.

: Use high temperature resistant materials such as copper alloy, stainless steel or special plastics, and the internal seals must be heat resistant and aging resistant (such as EPDM rubber).

: Made of high-temperature-resistant materials like brass, stainless steel, or specialized plastics. Internal seals require heat-resistant and anti-aging properties (e.g., EPDM rubber).

: The material cost is low, and ordinary plastic or cast iron is commonly used. The heat resistance is poor and it is easy to deform or leak if it is in contact with hot water for a long time.

: Use cost-effective materials such as standard plastics or cast iron, with lower heat resistance. Prolonged exposure to hot water may cause deformation or leaks.

：More rigorous calibration is required to ensure measurement accuracy at high temperatures. International standards (such as ISO 4064) have specific provisions for its error range.

: Require stricter calibration to ensure accuracy under high temperatures. International standards (e.g., ISO 4064) specify their error margins.

: The calibration standard is relatively loose and suitable for routine measurements under normal temperature conditions.

: Follow less stringent calibration standards, suitable for routine measurements in ambient temperatures.

: Widely used in heating systems, solar hot water circulation, industrial boilers or household hot water pipes.

: Widely used in heating systems, solar water heating cycles, industrial boilers, or residential hot water pipelines.

: Commonly found in tap water supply, agricultural irrigation, fire protection systems and ordinary household cold water pipes.

: Commonly installed in municipal water supply, agricultural irrigation, firefighting systems, and residential cold water pipelines.

: Due to the complexity of materials and processes, the price is usually 30%-50% higher than that of cold water meters, but the lifespan is longer in high temperature environments (up to more than 10 years).

: Due to complex materials and manufacturing processes, they are typically 30%-50% more expensive than cold water meters but have a longer lifespan in high-temperature environments (up to 10+ years).

: Economical and affordable, but its service life will be greatly shortened if it is used incorrectly in hot water scenarios.

: Cost-effective, but misuse in hot water systems significantly reduces their lifespan.

When choosing a water meter, you must strictly distinguish between hot and cold types. Mixing them incorrectly may cause equipment failure or inaccurate measurement. Hot water meters are suitable for special scenarios due to their high temperature resistance, while cold water meters are a cost-effective choice for normal temperature environments.

When selecting a water meter, it is critical to distinguish between hot and cold types. Incorrect usage may lead to device failure or inaccurate measurements. Hot water meters excel in high-temperature applications, while cold water meters offer cost-effectiveness for ambient environments.