1. Introduction
The SOZZDA ASW-1-K series sandwich-type ultrasonic water meter is specifically designed for applications such as agricultural irrigation, garden management, and water resource monitoring. This advanced water meter offers a combination of low cost, high measurement accuracy, low power consumption, and stable, reliable operation.
Its compact design, with a thickness of only 2 inches (50.8mm), saves significant installation space. All components are designed to meet IP68 protection standards, ensuring durability and functionality in various harsh environments. The unique structure minimizes the impact of water quality and pressure loss on measurements, representing a significant advancement in agricultural irrigation water management.
The sandwich-type ultrasonic water meter can be integrated with motor-pumped well controllers or utilize its built-in IO communication module for online monitoring of water resources, thereby reducing human and material costs associated with water management.
Figure 1: SOZZDA ASW-1-K Digital Ultrasonic Water Meter (DN50 variant shown)
2. Key Features
- Ultra-low Power Consumption: Designed for long-term operation, with a battery life exceeding 15 years under standard conditions.
- High Reliability & Wide Range Ratio: Ensures accurate measurements across a broad spectrum of flow rates.
- IP68 Protection Level: Fully waterproof and dustproof, allowing operation at depths of up to 2 meters underwater.
- Communication Interfaces: Equipped with RS485/USART/Infrared interface, with optional M-BUS and NB-IoT wireless transmission for remote connectivity.
- Independent Probe Structure: Provides stable and reliable ultrasonic measurement without any wearing components, reducing maintenance needs.
- Compact Design: A 2-inch (approximately 50mm) thickness saves valuable installation space.
- Local Display: Two-line display showing 9-bit cumulative flow, 6-bit instantaneous flow, various status prompts, and units.
- Data Storage: Built-in ferroelectric storage parameters automatically record cumulative flow for 31 months and daily flow for the 32nd month.
Figure 2: Product Features Overview
Figure 3: IP68 Rating and Material Quality
3. Technical Specifications
| Project | Parameter |
|---|---|
| Execution standard | ISO4064-2014, GBT778-2018 |
| Measured fluid | Water, sewage, seawater (other liquids require customization). Ensure that water fills the pipe. |
| Fluid temperature | 0.1-30 °C |
| Work environment | Temperature: -30 to 45 °C; Humidity 100%(RH) |
| Working pressure | 1.6MPa |
| Pressure loss | There is no loss of pressure |
| Sensitivity level of upstream flow field | U5 |
| Sensitivity level of downstream flow field | D3 |
| Climate and mechanical safety level | Level C |
| Electromagnetic compatibility level | Level E2 |
| Communication interface | RS485/USART/Infrared interface, optional M-BUS, NB-IoT wireless transmission |
| Output signal | Optional OCT |
| Power supply | Built-in lithium battery (3.6V, 4Ah) / External DC 8-24V power supply |
| Protection level | IP68 |
| Local display | Two lines show 9-bit cumulative flow, 6-bit instantaneous flow, various status prompts and units |
| Data storage | Lithium battery power is required for storing parameters. Automatically records cumulative flow of 31 months and daily flow of the 32nd month. |
| Flow measurement period | Application status: once/second; Verification status: 4 times/second |
| Material | Measuring tube: nylon+GF; Sensor: PEEK; Housing: ABS |
| Nominal Diameter | DN50, DN65, DN80, DN100, DN125, DN150 |
| Measurement Range Ratio R | 63 |
Table 1: General Technical Parameters
3.1 Dimensions and Flow Parameters
Table 2: Water Meter and Flange Dimensions (mm)
Table 3: Flow Parameters (m³/h)
4. Installation Instructions
4.1 Choosing Install Position
When installing the water meter, ensure the upstream straight pipe line is ≥5D and the downstream straight pipe line is ≥3D, where D is the pipe diameter. It is crucial that water completely fills the pipe at the installation point.
Figure 4: Correct vs. Wrong Installation Points
- Lowest point of the pipe line: Water must be full of the pipe.
- Flow is vertically or obliquely upward: Preferred for optimal measurement.
- Upstream straight pipe line: Must be ≥5D.
- Downstream straight pipe line: Must be ≥3D.
- Note: The arrow on the meter indicates the flow direction.
4.2 Installation Method
- Confirm Installation Size:
Cut 62.8mm of the pipeline. The water meter thickness is 50.8mm, and two seal gaskets are 6mm thick. Reserve space accordingly.
Figure 5: Pipeline Cutting for Installation
- Install Companion Flange:
Prepare and install the companion flanges on both ends of the cut pipe section.
- Fixed Flange:
Install the water meter with 3 screws to fix the flange evenly, then spot weld.
- Weld Flange:
Remove the water meter and weld the flanges securely to the pipe.
- After Cooling, Install with Seal Gasket and Tighten Screws:
Once the welded flanges have cooled, re-insert the water meter with the seal gaskets and tighten all screws. Ensure the direction signing on the water meter matches the direction of real flow.
- Installation Angle:
The top of the pipe line may not be full of water. It is suggested to install the water meter on a vertical direction of the pipe line within a ±45 degree angle from the vertical. Refer to the attached picture for guidance.
5. Operating Instructions
5.1 Parts Description and Display
The card type ultrasonic water meter is equipped with a wired transmission junction box (customizable for wireless transmission). The LCD provides comprehensive information.
Figure 6: Parts Description and LCD Content
Figure 7: Detailed LCD Display
- Infrared communication interface: For data transfer and configuration.
- Touch buttons: Used for menu navigation and settings.
- 9-bit cumulative flow display: Shows total measured flow.
- 6-bit instantaneous flow display: Shows current flow rate.
- Multiple flow units: Can be set according to user preference.
- Status prompts: Indicators for alarm/error, leak detection, wireless communication, in communication, permanent fault, valve open, battery low warning, current loop connection, and pulse output.
5.2 Menu Instruction and Operation Method
The water meter features capacitive touch buttons, marked with "▲" and "►".
- "▲" button:
- On the page: Modify the numbers.
- Wake up button and display (long press for 5 seconds).
- "►" button:
- Next page.
- Move the modified bit.
- "▲" slide from "▲" to "►": To enter the child menu; confirm operation.
- "►" slide from "►" to "▲": To exit the local menu.
5.3 Windows Display Instruction
The water meter has four main course options.
Example: In the main menu M-0, press the "Modify key" (likely "►") to enter the M-01 submenu. Press "▲" to display M-02. Press "▲" to return to the main menu M-0.
Video 1: Product demonstration and display navigation.
6. Maintenance
- Regular Inspection: Periodically check the water meter for any visible damage, leaks, or signs of wear.
- Battery Life: The built-in lithium battery has a life of over 15 years. No regular battery replacement is typically needed within this period.
- Cleaning: Keep the display and exterior of the meter clean. Use a soft, damp cloth for cleaning. Avoid abrasive cleaners or solvents.
- No Wear Parts: The ultrasonic measurement technology means there are no moving parts susceptible to wear, reducing the need for mechanical maintenance.
- Environmental Conditions: Ensure the operating environment remains within the specified temperature (-30 to 45 °C) and humidity (100% RH) ranges to prolong the meter's lifespan.
7. Troubleshooting
| Problem | Possible Cause | Solution |
|---|---|---|
| No display / Meter unresponsive | Battery low or depleted. | Long press the "▲" button for 5 seconds to wake up. If still unresponsive, check external DC power supply (if used). The internal battery is designed for long life, but extreme conditions or prolonged storage might affect it. |
| Inaccurate readings |
|
|
| Communication failure (RS485/NB-IoT) |
|
|
| Alarm/Error indicator on display | Specific error condition detected by the meter. | Refer to the LCD content description (Figure 6) for the meaning of the specific error code or icon. Address the underlying issue (e.g., leak, permanent fault). |
8. User Tips
- Accuracy for Home Use: While designed for agricultural and garden use, its high accuracy (Measurement Range Ratio R=63) makes it suitable for additional water metering in a home setting, provided installation guidelines are followed.
- Units: The meter can display flow in various units, which can be configured via the menu.
- Installation Method: The water meter is a "sandwich-type" and requires cutting the pipe for installation. It is not a clamp-on or external device that simply attaches to the pipe without modification.
9. Frequently Asked Questions
- Q: What is the accuracy of the flow meter? Can it be used as an additional water meter in a house? In what units?
- A: The flow meter has a Measurement Range Ratio R of 63, indicating high accuracy. Yes, it can be used as an additional water meter in a house, provided the installation requirements (e.g., straight pipe lengths) are met. The meter supports multiple flow units, which can be configured through the menu.
- Q: How is the water meter applied? Does it just lean on the tube, or do I need to cut the water tube?
- A: This is a sandwich-type water meter, which means it is installed directly into the pipeline. You will need to cut the water tube to insert the meter and then secure it with flanges. It does not simply lean on the tube.
10. Warranty and Support
For warranty information, technical support, or service inquiries, please contact SOZZDA Precision Instruments Official Store directly through your purchase platform or their official website. Please have your model number (ASW-1-K) and purchase details ready when contacting support.