1. Products and Services

YUA Instruments provides products and services including:

• Gas and liquid flow measurement instruments
• Dew point, pressure, and temperature monitoring products
• Display, recording, communication, and data acquisition devices
• Compressed air quality and energy efficiency monitoring products
• Operating condition analysis and product selection
• Measurement point planning and system configuration recommendations
• Installation, commissioning, and communication setup guidance
• Troubleshooting, repair, and after-sales technical support

The final scope of supply shall be subject to the quotation, order, contract, or technical agreement confirmed by both parties.

2. Application Information and Product Selection

The accuracy and reliable operation of industrial measurement instruments depend on the process medium, measurement range, pipe size, pressure, temperature, installation position, and site conditions.

Before placing an order, the customer should provide complete and accurate application information. Our technical team will use this information to recommend suitable products and installation methods, helping reduce the risk of incorrect product selection or improper installation.

3. Quotations and Order Confirmation

Product prices, models, quantities, technical specifications, payment terms, delivery schedules, and shipping arrangements shall be subject to the formal quotation or contract.

Quotations remain valid for the period stated in the relevant quotation. An order becomes effective only after it has been accepted and confirmed by YUA Instruments in writing.

After an order has been confirmed, any change to the product model, specifications, quantity, delivery address, or other requirements must be reconfirmed by both parties in writing.

Changes to customized products or orders that have already entered production or configuration may result in additional costs or delivery delays.

4. Delivery and Inspection

The delivery period begins after the order details, technical specifications, and agreed payment have all been confirmed.

Upon receiving the products, the customer should promptly check:

• Whether the outer packaging is intact
• Whether the product models and quantities are correct
• Whether there is any visible shipping damage
• Whether the accessories and technical documents are complete

If any shipping damage, quantity discrepancy, or incorrect product is found, the customer should retain the original packaging, take relevant photographs, and contact us promptly. We will investigate the issue and provide an appropriate solution.

5. Technical Support

YUA Instruments provides continuous technical support throughout product selection, installation, and operation, including:

• Product selection and application review
• Installation position and straight-pipe requirement recommendations
• Wiring, parameter configuration, and commissioning guidance
• Output signal and communication connection support
• Measurement abnormality and alarm analysis
• Remote troubleshooting
• Repair, calibration, and spare-part consultation

Technical support may be provided by email, telephone, video conference, or another remote method agreed upon by both parties.

Where necessary, and depending on the project location and actual service requirements, we may coordinate on-site support or assistance through an authorized service partner.

6. After-Sales Response and Service Time

YUA Instruments follows a clear and traceable after-sales service process:

To help us resolve the issue efficiently, customers should provide as much of the following information as possible:

• Product model and serial number
• Order or purchase information
• Actual operating conditions
• Installation photographs
• Current parameter settings
• Fault description, alarm information, photographs, or video

7. Warranty

The applicable warranty period shall be stated in the quotation, contract, product manual, or documents supplied with the product.

During the warranty period, if inspection confirms that a fault was caused by defective materials, manufacturing, or the product itself, YUA Instruments will provide repair, replacement parts, or product replacement, depending on the actual circumstances.

The following circumstances are generally not covered by the free warranty:

• Operation beyond the specified pressure, temperature, measurement range, or environmental limits
• Incompatibility between the process medium and the selected product materials
• Incorrect installation, wiring, power supply, configuration, or operation
• Unauthorized disassembly, modification, or repair
• Damage caused by impact, water ingress, contamination, or improper transportation
• Normal wear or consumable components
• Damage caused by lightning, fire, flooding, abnormal power supply, or other external events

8. Returns and Repairs

Industrial measurement products are often selected, configured, or customized for specific operating conditions. Any return, replacement, or repair request must therefore be submitted to and approved by YUA Instruments in advance.

Products returned without prior authorization may not be identified or processed promptly.

If a return or replacement is requested because of incorrect product selection, changed operating conditions, or another customer-related reason, we will assess the request based on the product’s condition, customization status, and related costs.

Before returning any product, the customer must clean it properly. If the product has been exposed to hazardous, corrosive, toxic, or contaminated media, the customer must disclose the relevant media information and complete appropriate decontamination and safety procedures before shipment.

9. Product Information

Product descriptions, images, catalogs, and technical materials on our website are intended to present the general features and applications of our products.

As products are continuously improved, certain specifications, configurations, or external designs may be updated without prior notice. Final product specifications shall be subject to the confirmed quotation, technical agreement, and documents supplied with the product.

The customer is responsible for confirming product suitability based on the actual application conditions. If there is any uncertainty, please contact our technical team before placing an order.

10. Limitation of Liability

YUA Instruments will use reasonable care to fulfill its product supply and technical support obligations. However, we shall not be liable for indirect losses, loss of production, loss of profit, or business interruption resulting from:

• Incomplete or inaccurate application information provided by the customer
• Installation, operation, or maintenance that does not comply with technical requirements
• Unauthorized product modifications or system configuration changes
• Failures of third-party equipment, communication networks, systems, or software
• Shipping delays, customs procedures, force majeure events, or circumstances beyond our reasonable control

If otherwise agreed in a written contract or technical agreement, the separately agreed terms shall prevail.