Zhongyuan InstrumentReliable Mechanical & Electrical Gauges for Vehicles and Machinery

Quality Control

Our inspection process for every batch

Inspection Process

Every batch of gauges goes through a multi-step quality inspection before shipment.

CNC winding machines for precision gauge coil production

Precision CNC winding for gauge coil production

Gauge assembly workshop with quality inspection stations

Dedicated assembly and inspection workstations

1

Incoming Material Check

Raw materials including metal casings, dial faces, glass lenses, and electronic components are inspected upon arrival to verify specifications and surface quality.

2

Dial Printing Check

Each batch of printed dials is checked for scale accuracy, logo placement, color consistency, and print clarity before assembly.

3

Pressure / Temperature Range Inspection

Gauges are tested at minimum, midpoint, and maximum scale values to verify reading accuracy. Pressure gauges are tested with calibrated pressure sources; temperature gauges are tested in temperature-controlled environments.

4

Appearance Inspection

Each gauge is visually inspected for bezel finish, glass clarity, pointer alignment, dial cleanliness, and overall cosmetic quality.

5

Packaging Inspection

Packaging is checked for proper protection, correct labeling, and quantity accuracy. Export-grade packaging ensures gauges arrive in perfect condition.

6

Sample Confirmation Before Bulk Order

Before bulk production begins, we provide pre-production samples for customer approval. Only after sample confirmation do we proceed with the full production run.

Documents & Certificates

Available for qualified buyers upon request

Certificates

To be uploaded

Test Reports

Available upon request

Factory Documents

Available for qualified buyers

Need Quality Documentation?

Contact us to request test reports and factory documents for your order.