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Zhejiang Guojian Testing Technology Co., Ltd (CCT) Metrology provides efficient, trustworthy and cost-effective Instrument Calibration Services and issues calibration certificates. Instrument calibration is a critical service for ensuring that measuring instruments and testing equipment provide accurate readings within an acceptable range. This is particularly important when precise measurements are crucial for producing high-quality products.

WHY CHOOSE Zhejiang Guojian Testing Technology Co., Ltd (CCT)   METROLOGY

Our advanced calibration laboratory in China, offers hassle-free testing and calibration of a wide range of measuring and testing instruments. Zhejiang Guojian Testing Technology Co., Ltd (CCT) has been a trusted name in material testing for over two decades. We take pride in providing state-of-the-art equipment and technology to ensure accurate verification and certification of your instruments. Our calibration services are ISO 17025 accredited, and all measurement results are traceable, ensuring reliable and precise calibration certificates.

At Zhejiang Guojian Testing Technology Co., Ltd (CCT) Metrology, our team of highly skilled technicians has a combined experience of over 20 years in performing calibration services. We use top-of-the-line equipment to ensure that your testing and measuring instruments are properly calibrated. Our ISO 17025 accredited calibration laboratory is located in China and is fully equipped to handle all your calibration needs.

Before calibration, we record the "As Received" data for all instruments based on predetermined test points. Any necessary adjustments are then made, and the "As Left" data is documented. All calibration results, including the "As Received" and "As Left" data, are included in the Calibration Certificate along with other information required for compliance with ISO 17025 calibration standards.

Our turnaround time is quick, with standard calibration services often completed within five business days. For those who require faster turnaround, we offer expedited service. You can specify the calibration frequency of your instruments based on factors such as environment, usage, manufacturer's recommendations or other guidelines. We record the frequency in our calibration system and send automated reminders prior to the due date for re-calibration.


Zhejiang Guojian Testing Technology Co., Ltd (CCT)   Metrology’s calibration capabilities cover a wide range of disciplines, including:

· Dimensional Calibration       

· Pressure Calibration

· Force Calibration

· Torque Calibration 

· Electrical Calibration

· Temperature Calibration

· Mass Calibration

· Vacuum Calibration

· Humidity Calibration 

· On-site Calibration 

Our team of highly trained field technicians can perform calibration services for various types of equipment, including surface plates, ovens, testing machines, and hardness testers. To schedule an on-site calibration service, you can contact us directly at [email protected]. We are committed to providing fast and convenient scheduling for all our customers.


The equipment used in our calibration lab for dimensional calibration, linear inspection and other verification offers an extensive range of capabilities not available at many other calibration companies, including:

· Torque calibration from 0 to 2,000 ft. lbs.

· Pressure calibration to 40,000 PSI. I

· Length standards up to 120 in.

· Gage blocks up to 20 in.

· Surface plates up to 14 ft. diagonal 

At Zhejiang Guojian Testing Technology Co., Ltd (CCT) Metrology, we offer calibration services for threaded ring gauges and maintain a comprehensive inventory of more than 750 master set plugs. If we don't have the necessary master set plug for your ring gauge calibration, we'll find a suitable solution for you. Our inventory of master set plugs is available on our Calibration Set Plugs page. In some cases, an instrument may not be calibratable in-house. In such cases, we collaborate with one of our approved vendors to complete the order. To expedite orders that require an outside vendor, please include a note on your purchase order granting us permission to subcontract.

Here are more resources for an easy calibration experience:

· CNAS accreditation with the full scope of our approved instrument calibration

· Calibration Services & Instruments Calibrated quick-reference list of measuring tools and instruments calibrated by our lab and field technicians

Minimizing the risk of measurement errors is essential for both you and your customers. Measuring tools, instruments, and masters can easily fall out of tolerance due to various factors such as environmental conditions, excessive use, and time. Therefore, it is crucial to establish a routine calibration plan to ensure accurate measurements. Don't take chances with measurement accuracy; schedule your calibration today.

See additional pages about our specific calibration services or request a quote today.

Q: What does your company do?
A: We have been focusing on the inspection of parts and Metallic materials for more than 20 years.

Q: What is the price of testing?
A: The specific cost should be quoted according to your sample quantity, test items and test standards. It is convenient for you to leave your contact information, and I will ask the engineer in charge of this field to make a quotation for you.

Q: Where is your company?
A: Our headquarter is in Zhejiang,China, and we have offices all over the country.
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