Shanghai Yuxin Instrument Technology Co., Ltd. has been a distributor of EA (Elektro-Automatik, part of the Tektronix group since 2024) power supplies and electronic loads since 2011. Below is the 2026 authorization letter issued by Tektronix China Ltd, bearing its official seal.
Click the image to enlarge, or download the PDF (with seal; suitable as an attachment for tenders and registration files).
Authorization details
| Letter number | 2026EA005 |
| Authorized company | Shanghai Yuxin Instrument Technology Co., Ltd. (上海雨芯仪器科技有限公司) |
| Scope | Certified distributor of EA all series products within East China |
| Valid period | April 1, 2026 — March 31, 2027 |
| Issued by | Tektronix China Ltd (泰克科技（中国）有限公司) |
Verify the letter number
Enter the number printed at the top right of the letter (for example 2026EA005):
About authenticity
Any certificate published online can be downloaded and altered. That is why we handle ours as follows:
1. The version shown here is watermarked (company name + website + letter number). If someone removes our name and puts theirs on, the watermark is still there.
2. The letter number can be verified on this page; a forged number returns no record.
3. The scope is fixed in the letter itself — East China only — so it cannot be passed off as a nationwide authorization.
4. For the most authoritative check, use Tektronix official channels: www.tek.com.cn, EA product line www.tek.com.cn/products/ea, hotline 400-820-5835.
You are also welcome to call us at +86-21-64511359 to request the original document for verification.
