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FNIRSI Coupon Codes & Discounts

28 offers · updated · save up to 25%

Edited by Danica P. · Reviewed by Ivan P. · offers last checked Oct 20, 2026

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Current FNIRSI offers

Top offer

Code

15% off your order

Last seen Nov 7 Checked Oct 20, 2026

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  • Checked in a real cart: Oct 20, 2026
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Code

10% off your order

Last seen Nov 7 Checked Oct 20, 2026

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  • Checked in a real cart: Oct 20, 2026
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Code

8% off your order

Last seen Nov 7 Checked Oct 20, 2026

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  • Checked in a real cart: Oct 20, 2026
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Code

6% off your order

Last seen Nov 7 Checked Oct 20, 2026

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  • Checked in a real cart: Oct 20, 2026
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Code

6% off your order

Last seen Nov 7 Checked Oct 20, 2026

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  • Checked in a real cart: Oct 20, 2026
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Code

6% off your order

Checked Oct 20

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  • Checked in a real cart at FNIRSI: the store accepted the code and took the discount off.
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Code

6% off your order

Checked Oct 20

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  • Checked in a real cart at FNIRSI: the store accepted the code and took the discount off.
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Code

6% off your order

Checked Oct 20

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  • Checked in a real cart at FNIRSI: the store accepted the code and took the discount off.
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Code

5% off your order

Checked Oct 20

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  • Checked in a real cart at FNIRSI: the store accepted the code and took the discount off.
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Code

5% off your order

Checked Oct 20

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  • Checked in a real cart at FNIRSI: the store accepted the code and took the discount off.
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Code

5% off your order

Checked Oct 20

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  • Checked in a real cart at FNIRSI: the store accepted the code and took the discount off.
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Code

5% off your order

Checked Oct 20

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  • Checked in a real cart at FNIRSI: the store accepted the code and took the discount off.
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Code

5% off your order

Checked Oct 20

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  • Checked in a real cart at FNIRSI: the store accepted the code and took the discount off.
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Code

5% off your order

Checked Oct 20

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  • Checked in a real cart at FNIRSI: the store accepted the code and took the discount off.
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Fnirsi promo: sign-up for 10% off your first order

Last seen Nov 7

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Free shipping

Save Up to 15% on FNIRSI products + Free Shipping

Last seen Nov 7

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FNIRSI at a glance

Cart tests
14 codes checked last 30 days, 100% worked How we count
Free shipping
Over $30
Returns
15 days
Ships internationally
Yes

About FNIRSI

FNIRSI builds electronic test equipment: handheld oscilloscopes, multimeters, soldering tools and other measurement devices, from a brand that has developed products for over 10 years.

The detail that matters most before hunting for a code is that coupons cannot be combined, so each order carries a single discount, and some items on the site are not eligible for coupons at all.

FNIRSI is the brand of Shenzhen FNIRSI Technology Co., Ltd., a company that handles research, production, sales and service of testing and measurement instruments and also takes on ODM/OEM work. Its about page describes a design approach meant to keep products simple, convenient, professional, efficient and youthful.

The catalog reaches past oscilloscopes and multimeters. It includes the DMC-100 clamp meter, the 2C53T three-in-one oscilloscope, the DPS-150 mini power supply, the LCR-P1 transistor tester, the HS-02 and HS-03 soldering irons, the SAG-55 hot air gun, battery spot welders, network cable trackers, logic analyzers, signal generators, thermal imaging multimeters, USB testers, moisture meters and a car OBD diagnostic tool. The site also runs an affiliate program and takes business and bulk orders.

When shoppers look for FNIRSI coupons

FNIRSI coupon searches peak in May, about 1.5× a typical month, and dip lowest in February.

US Google searches, Sep 2025 to Aug 2026. Search interest, not sales.

Does FNIRSI offer free shipping?

Yes. A site-wide banner advertises free shipping on orders over $30, marked with an asterisk whose conditions are not shown.

How long does FNIRSI shipping take?

Processing takes up to 3 business days, rates depend on location and weight, and delivery is estimated at 15-25 business days.

What is FNIRSI's return policy?

Devices go back within 15 days of delivery with prior authorization, unused and boxed with proof of purchase; sale items and gift cards are excluded.

What payment methods does FNIRSI accept?

Cards, PayPal, and Shop Pay, which splits a purchase into 4 interest-free payments or monthly installments.

More about shopping at FNIRSI

Change-of-mind refunds
A 5-6% currency conversion fee is kept, and refunds reach the original payment method within 10 business days.
Coupon limits
A single code per order, and certain products on the site are not eligible for coupon discounts.
Worldwide shipping
Customs fees and import taxes fall on the buyer, apart from duty service on orders under $150 to listed EU countries.

From FNIRSI's own pages, read Sep 30, 2026.

Sources: FNIRSI website, FNIRSI shipping policy, FNIRSI returns policy, FNIRSI payment options page

How to use a FNIRSI coupon code

  1. FNIRSI's checkout asks for the coupon code and then a click on Apply before continuing; skipping that click means the discount never appears on the total.
  2. Only one coupon code works per order, so on a handheld oscilloscope or a multimeter kit it pays to compare the offers available and pick the one that cuts that particular cart the moSt. Some items are not eligible for coupon discounts and the store does not list which, so a rejected code may simply mean the product is excluded rather than the code having lapsed.
  3. The payment method changes the currency as well: PayPal settles in U.S. dollars, while card payments are charged in the shopper's local currency.
Where to enter a FNIRSI code at Shopify checkout (illustration)
Where the code box sits on Shopify's standard checkout (illustration; screens vary).

If your FNIRSI code doesn't work

  • Exclusions: Some items on the site are not eligible for coupon discounts.
  • One code per order: Coupons cannot be combined; one coupon code per order.
  • Where to enter it: Enter the coupon code at checkout and click Apply before continuing, or the discount will not show.

More reasons a code fails, and what to try: why promo codes don't work.

More ways to save at FNIRSI

  • The clearest lever at FNIRSI is the order total, since the banner promises free shipping above $30, which rewards grouping test gear into one order instead of several.
  • Shop Pay spreads a larger instrument over 4 interest-free payments without changing its price.
  • Weigh the return rules before chasing a deep discount: sale items cannot be returned, and a change-of-mind refund loses a 5-6% currency conversion fee, so a discounted meter is best treated as a final purchase.

FNIRSI questions, answered

Can two FNIRSI coupon codes be used on one order?

Coupons at FNIRSI cannot be combined, so each order accepts a single code.

How long does FNIRSI delivery take?

Orders are processed within 3 business days and then take an estimated 15-25 business days to arrive. Shipping rates are calculated at checkout from location and weight.

Are discounted FNIRSI items refundable?

Sale items and gift cards cannot be returned, which makes marked-down test gear a final purchase.

Who pays customs on FNIRSI orders?

Customs fees and import taxes are the customer's cost, except for duty service on orders under $150 to listed EU countries. Packages sent back for unpaid duties are refunded minus the return fee.

15% off 15% off your order
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