Digital caliper is a versatile measuring tool. It’s widely used in workshops or DIY field. What are the criteria for a quality digital caliper ? How to judge its quality ? Not every one knows it. Now, follow the following criteria, you’ll be able to distinguish between a high-end digital caliper and a low-end digital caliper.

1) The accuracy of electronic module
The accuracy of electronic digital caliper depends on the accurancy of mechanical parts , electronic module and stator strip sensor. Manufacturing electronic module needs high technology and special precision equipment. There are several manufacturers of electronic modules in China.But only one manufacturer can make electroni module with high accuracy. All low-end electronic digital calipers use electronic modules with low accuracy. How can we know the accuracy of electronic module ? Just check digital caliper with a set of 9-piece gauge blocks with a step of 0.5mm, such as 1, 1.5, 2, 2.5, 3, 3.5, 4, 4.5, 5mm or with a module master (from 5mm to 10mm, the correct way is to set zero while the measuring faces of the digital caliper’s lower jaws contact the Module Master at 5mm and then begin to measure in order to avoid the errors of the stator, the measured value should be 0, 0.5, 1, 1.5, 2, 2.5, 3, 3.5, 4, 4.5, 5mm which corresponds to 5, 5.5, 6, 6.5, 7, 7.5, 8, 8.5, 9, 9.5, 10mm of the Module Master), you can easily find out the accuracy of the module. If the accuracy is=0.01mm, it shows the module’s accuracy is high. If the accuracy is =0.02mm, it shows the module’s accuracy is low. Anyi’s specially designed Module Master can check modules fast and easily(see the image attached ).
2) The accuracy of outside measurement
Check the inside measurement of a digital caliper with gauge block set or step gauge. If the accuracy is =±0.02mm (0-100mm) and =±0.03mm (>100-300mm), it shows the accuracy accords with the limit of National Standard.

3) The clearance of closed measuring faces
Close the measuring faces, hold the caliper between your eyes and the light. Align the light, measuring faces and your eyes. If you can see light from the closed measuring faces, it shows the measuring faces are not lapped well. If you can’t see any light from the closed measuring faces, its shows the measuring faces are well lapped . All quality digital calipers have well lapped measuring faces....

If you are not satisfied with our products sold to you, you may return them to us in their original condition for exchange or a full refund within 60 days of shipping date. This guarantee does not apply to OEM, Wholesale , custom orders and items not in their original condition.

The return steps are as follows:
Step 1: Tell us your intention of replacement or refund by email or fax and other details such as your name, telephone number, email , country, product name and item number, the reason of refund or exchange, etc.. We’ll arrange the return or exchange after we confirm with you.

Step 2: Return
All ruturns must be sent to this address:
Name of Contact Person: LUO GUANG FU
Company name: ANYI INSTRUMENT CO., LTD.
Address: 1st Floor, Chuangxin Building, Industrial Park of High-tech Zone, Guilin 541004, P.R.China
Telephone: +86 - 13097735690
Description of Goods: Measuring Tools Sample Return
Declared Value: $10 (for example)...

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