Photoelectric Water Meter
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Photoelectric Direct-Reading Water Meter with M-Bus Interface

Wired remote reading smart water meter
Understanding the photoelectric direct water meters with M-Bus

The photoelectric direct reading water meter is an intelligent instrument capable of measuring the total amount of unidirectional water flow in potable cold water pipelines over long distances. What makes these meters stand out is their photoelectric technology, which allows remote and direct reading of water usage. This means less hassle for utility companies, as they no longer need to send out staff for regular meter readings.

Advantages of M-Bus water meters

These water meters use photoelectric direct reading technology to discern the position of the meter's dial. This technology, a fusion of photoelectric and microelectronic technologies, is a form of "position recognition." Remarkably, it consumes no power during standby and activates only momentarily for reading the dial. This approach is a departure from traditional pulse output water meters. With a split design, the electronic unit is housed in a separate, fully sealed chamber, offering IP68 waterproof performance and immunity to light interference. This unique design does not compromise the traditional water meter's structural integrity, measurement accuracy, or sensitivity. By minimizing reading errors, these meters become an essential component in automatic meter reading (AMR) systems, ensuring zero electromechanical conversion errors.

Diverse applications of M-Bus water meters

M-Bus water meters are mostly used in residential, commercial, and industrial settings as they are ideal for collecting data from various instruments and centralized management of water resources.

Specifications
Approval ratio R Overload flowrate Q4 Permanent flowrate Q3 Transitional flowrate Q2 Minimal flowrate Q1 Resolution of reading Maximum reading
Q3/Q1 m³/h m³
80 3.1 2.5 0.050 0.031 0.00005 9,999
100 0.040 0.025
80 5 4 0.080 0.050 0.00005 9,999
100 0.064 0.040
80 7.9 6.3 0.126 0.079 0.00005 9,999
100 0.101 0.063
80 12.5 10 0.200 0.125 0.00005 99,999
Dimensions
  • Photoelectric Water Meter
  • Photoelectric Water Meter
Nominal diameter Length L1 Length L Width B Height H Threaded connection
mm D d
15 165 259 80 106 G¾B R½
20 195 299 80 106 G1B R3/4
25 225 345 83 108 G1⅓B R1
32 230 354 103 148 G1½B R1⅓
40 200 328 114 154 G2B R1½
Features
  • Unlike traditional pulse output water meters, photoelectric water meters read the dial directly, eliminating the need for setting base numbers or constants, ensuring mechanical and electronic readings are perfectly aligned without cumulative errors.
  • Photoelectric water meters activate only during meter readings, significantly reducing energy consumption.
  • Use a direct method to read the dial's position.
  • Each meter has a unique address, simplifying the wiring and installation process.
Functions
  • Flow measurement: Capable of measuring unidirectional, non-pulsating water flow.
  • Collective meter management: Through RS485 communication with a computer, the meter allows for setting of meter numbers, reading, and writing of base consumption data.
Working Conditions
  • Operating voltage: ①DC9-24V (RS485 interface), ②DC24-42V(M-Bus interface);
  • Water temperature: 0.1～+45℃ (cold water), 0.1～+90℃ (hot water);
  • Humidity: 0～95%RH;
  • Communication mode: available in RS-485 interface or M-Bus interface;
  • Communication output: 1200/2400/4800/9600bps optional;
  • Measurement range: up to ≤300m;
  • Current consumption: < 1mAh in the state of sleep, < 12mAh during meter reading;
  • Communication protocol: CJ/T188-2004 / DL/T645-2007 /MODBUS optional, or other methods as per your request
FAQs

M-Bus meters can be integrated into various building management systems through gateways or converters. This integration allows for seamless communication with other technologies, facilitating remote centralized management of water resources. By connecting M-Bus meters to broader building systems, they become part of a cohesive network that efficiently manages and monitors water usage within the infrastructure.

The technology behind M-Bus meters is continually adapting to new advancements. For instance, integration with the Internet of Things (IoT) is a significant step forward, enhancing the ability of these meters to communicate within a connected ecosystem. These developments promise improved energy efficiency and greater automation in water management, signaling a forward-thinking approach in metering technology.
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Why Us

Since 1966, Lianyungang Water Meter Co., Ltd. has been an innovation in water meter technology. Based in Jiangsu Province, we're recognized as a high-tech enterprise for our innovative and reliable solutions. We combine decades of experience with a commitment to quality, making us a trusted choice for customers worldwide. Langhua is not just about water meters; it's about delivering efficient and accurate water management tools.

  • Company experience Company experience 58+

    Established in 1966, Lianyungang Water Meter Co., Ltd. has been at the vanguard of the water meter industry for over 57 years. Our journey from a modest beginning to a nationally recognized high-tech enterprise in Jiangsu Province exemplifies our commitment to quality and customer satisfaction.

  • Annual output Annual output 3,000,000+

    Thanks to our advanced manufacturing facility and advanced production lines, we can achieve an annual output of over 3 million water meters. This capacity reflects our excellent manufacturing capabilities and our ability to meet the growing demands of both national and international markets.

  • OEM Service OEM Service

    Our OEM services demonstrate our flexibility and expertise in customization. Catering to a broad range of needs, we've provided hundreds of companies with tailor-made water meters, ensuring precise measurements and durability across various applications.

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