In This Post:
I. Why Do We Need to Test Water Meters?
- Meter runs fast: Consumers overpay, leading to complaints;
- Meter runs slow: Utility companies suffer revenue losses;
- Flow range drift: Under tiered water pricing, users may be placed in incorrect billing brackets.
Regular verification is the only way to ensure fair water metering, and the core equipment responsible for this task is the water meter test bench.
Ⅱ. What Is a Water Meter Test Bench and How Does It Work?
Working principle: In a controlled environment, water flows through the meter being tested, while a reference standard with higher
accuracy measures the same flow simultaneously. The readings of the two are compared to calculate the error.
Core mission of the test bench: To ensure that every water meter is accurate when it leaves the factory and remains reliable throughout its service life.
III. What Are the Components of a Water Meter Test Bench?
Taking S.H.METERS' fully automatic test bench as an example, it consists of eight core systems:
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System Name
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Core Components
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Function Description
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Stabilized Water Supply System
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Grundfos pump, stabilizer tank, filtration unit
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Provides stable, clean test water
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Piston Metering System
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Servo motor, linear encoder, sealed piston cylinder
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High-precision micro-flow measurement (starting at 2L/h)
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Clamping & Piping System
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Automatic clamping mechanism, POM straight pipe sections
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Secures meters under test, compatible with DN15~DN50
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Flow Regulation Device
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Pneumatic control valve, diverter, electromagnetic flowmeter
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Precisely regulates test flow across different ranges
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Reference Metering System
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High-precision scale, electromagnetic flowmeter
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Reference standard for medium-to-high flow, dual-system with piston
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Diverter System
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Flip-plate diverter, photoelectric sensors
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Precisely switches flow direction, uncertainty <0.05%
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Image Acquisition System
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Industrial camera, image recognition software
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Automatically reads meter dials, with an acquisition accuracy of 0.001L
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Software Control System
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Siemens PLC, HMI
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One-click start, fully automatic verification process
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IV. Five Core Advantages of S.H.METERS' Water Meter Test Bench
The piston + scale dual-reference system maintains excellent stability even at flow rates as low as 2L/h. Overall system accuracy exceeds 0.2% (k=2), meeting international standards such as ISO 4064 and OIML R49.
2. Intelligent – No Manual Monitoring Required
The image acquisition system automatically recognizes meter dials without requiring precise alignment, with acquisition accuracy of 0.001L. It significantly reduces labor intensity and eliminates human reading errors.
3. Fully Traceable – Every Test Has a Record
Dial photos are automatically saved before and after each verification, which can be retrieved for review at any time, effectively avoiding trade disputes.
4. Flexible – Compatible with Multiple Meter Types
Compatible with DN15~DN50 (customizable up to DN300) ultrasonic, mechanical, and electromagnetic water meters. Signal acquisition supports M-Bus, RS485, infrared, pulse, image, and more. Report templates are customizable.
5. Highly Automated – Full Computer Control from Clamping to Report Generation
The Siemens PLC runs the entire process automatically. Up to 10 DN15 meters can be verified simultaneously in one batch. A single operator can manage multiple test benches, with efficiency several times higher than traditional methods.
V. Why Does S.H.METERS Develop Test Benches In-House?
First, Quality Control. By owning the most accurate "measuring stick," we ensure the quality of every water meter leaving the factory, achieving end-to-end quality control from design to inspection.
Second, One-Stop Service Solution. We provide a fully integrated "Water Meter Design → Manufacturing → Verification" solution, so customers don't need to coordinate with multiple suppliers:
- Saves time: Shortens delivery cycles;
- Saves money: Reduces communication costs;
- Saves hassle: Unified quality control standards.
Third, Driving Industry Advancement. Through continuous technological innovation, we contribute to the development of smart water utilities.
VI. Global Applications and Service Commitment
Our test benches have been exported to more than 20 countries and regions, including India, South Korea, and Australia.
We provide full lifecycle service coverage:
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Phase
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Services
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Pre-Sales
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Needs assessment, solution customization, and site survey
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During-Sales
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Quality inspection, various acceptance support
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After-Sales
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Remote guidance, on-site installation & commissioning, operator training, 1-year warranty, lifetime software maintenance, spare parts supply
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The water meter test bench is the unsung hero that ensures fair water billing transactions. S.H.METERS is committed to providing a "Water Meter Design → Manufacturing → Verification" integrated solution for the global water industry.
If you are planning to establish water meter verification capabilities or upgrade existing equipment, feel free to contact us.
Hebei Shanghong Meters Technology Co., Ltd. (S.H.METERS)
📍 25th Floor, Tower A, Fangbei Building, No.133 East Yuhua Road, Shijiazhuang City, Hebei Province, China