Which regions do you cover?

We serve clients nationwide and handle cross-region delivery. Tell us your location and requirements and we will assign the right team.

How do I get a quotation?

Send us your requirement, quantity and delivery expectation through the form or by phone. We issue a formal quotation within 1–2 business days.

Can you provide samples?

Yes. Depending on your requirement we can send samples or arrange a small trial run so you can validate performance in real use.

How is after-sales support handled?

A dedicated after-sales team provides support through the whole service period, with response times stated in the contract.

Can we work together long term?

Yes. We build long-term relationships, and most clients have worked with us for over three years. Annual agreements can fix price, capacity and quality terms.

Talk to salesReply within 12 hours on business days

sales@ruisi-elec.com WhatsApp +86 139 6258 6688

Technical note: measuring ripple on a power module correctly

2026-05-09

Probe choice, bandwidth limiting and grounding — the mistakes that show up in test results.

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Every board has to survive the ageing test

Tell us what you need — we will route it to the right specialist within one business day.　+86 512 6888 9900

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