Card flowmeter

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1. What are the differences in the working principles of electronic gas meters? The main differences in the working principles of electronic gas meters are reflected in sensing technology, data transmission methods, and functional modules. The following is a specific classification and principle comparison. 1. IC card electronic gas meter • Core principle: Store the purchased gas volume through the IC card chip, read the data after inserting it into the gas meter, and control the valve switch. Differences: Dependent on physical card interaction, no remote communication function, requiring users to actively recharge. two Remote electronic gas meter • Core principle: The gas flow sensor converts mechanical signals into electrical signals, which are transmitted to the backend system through wired/wireless (such as NB IoT, LoRa). Differences: Real time remote meter reading of Li Ji, no need for manual intervention, supporting automatic data reporting. three Ultrasonic electronic gas meter • Core principle: Using the time difference between ultrasonic forward/backward flow to calculate flow rate, without mechanical components. Differences in Mountain Qi: Measurement accuracy reaches ± 1% (mechanical meters usually ± 2%), strong anti-interference ability, and longer lifespan. four Intelligent electronic gas meter • Core principle: Integrated flow monitoring, abnormal alarm (such as leakage), bidirectional communication (supporting mobile APP control). Differences: Equipped with AI analysis capabilities, able to link smart home devices (such as automatic valve closing). Comparison Table: | Type | Sensing Technology | Data Transmission | Typical Power Disturbance Ling Neng | | ------------------------------------------------------------------------------------------------------ | IC Card Meter | Mechanical Flow Meter | No (card insertion required) | Prepaid, Valve Control | Remote Transmission Meter | Hall Sensor Sensor | NB IoT/Wired | Remote Meter Reading and Usage Statistics | Ultrasonic Meter | Ultrasonic Probe | Optional Remote Transmission Module | High Precision Measurement, Low Maintenance | Intelligent Meter | Multi Sensor Fusion | 4G/5G/WiFi | Real time Monitoring, Intelligent Linkage | Key Parameter Reference: ± 1% - Communication module power consumption: NB IoT standby current<5 μ A

2. How to charge for dormitory water control

There are two main billing methods for dormitory water control: time-based billing and metering billing. Time based billing: Principle: Time based billing is calculated based on the duration of water usage. When the user inserts the card into the sensing area of the water control machine, the machine will start timing and charge according to the pre-set rate. Operation process: During the continuous use of water by the user, the water control device will continuously time and deduct fees. When the user unplugges the card or actively closes the hot water valve, the water controller will detect this action and immediately stop timing, stopping water supply, and deducting fees. Measurement fee: Principle: Measurement fee is calculated based on the actual amount of water used by the user. This method requires the installation of flow meters in the water control system to accurately measure the users water consumption. Billing method: The water consumption measured by the flow meter will be charged at the corresponding price per unit of water. This method can more intuitively reflect the actual

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