# Signal generator Fnirsi SG-004A — 1 MHz output, 5 V amplitude

**URL:** https://aio.lv/en/product--fnirsi-sg-004a--11618327
**Data updated:** 2026-05-19 09:12 (EEST)
**Category:** Miscellaneous repair tools
**Manufacturer:** Fnirsi
**Manufacturer code:** SG-004A
**EAN:** 5907085527352
**Warranty:** 2 Years
**Availability:** Available for order
**Price:** 125.49 €
**Prices and availability valid until:** 2026-07-23 23:59
**Price without VAT (21%):** 103.71 EUR
**Can be purchased by legal entities:** Yes (invoice)
**Buy:** https://aio.lv/en/product--fnirsi-sg-004a--11618327

## Delivery options

| Delivery method | Delivery time | Cost |
|---|---|---|
| Office pickup (2b. Kengaraga str., Riga, Latvia, LV-1063) | 09.07.2026 | free |
| Pickup points | 14.07.2026 | 1.89 EUR |
| Courier delivery to door | 14.07.2026 | 4.99 EUR |

## Summary description

Fnirsi SG-004A is a compact signal generator providing a 1 MHz frequency output with a 5 V amplitude. Designed for electronics testing, troubleshooting and bench use, it supplies stable single-frequency signals for component checks, circuit alignment and educational experiments. Its simple interface makes it suitable for hobbyists and technicians needing a basic, reliable signal source.

## Long description

The FNIRSI SG-004A is a compact signal generator offering up to 1 MHz output frequency with a 5 V amplitude. Designed for electronics testing, troubleshooting and calibration, it delivers stable single-frequency signals and supports a range of measurement and simulation tasks. The unit features a 2.4-inch LCD with adjustable brightness, color-coded backlighting for modes, semi-transparent buttons and a lightweight, pocket-sized housing (112 x 82 x 27 mm, 165 g) for mobile use. Battery-powered operation (3000 mAh) with USB‑C charging and up to 24 hours standby time make it suitable for fieldwork and bench use.
Advantages
The SG-004A provides measurement accuracy of ≤0.2% and rapid readings in about one second, enabling efficient diagnostics. It supports multiple signal types and modes — including current and voltage I/O testing, speed simulation, actuator position adjustment and inverter diagnostics — and offers a real-time curve view to monitor input/output changes. The device includes drop protection, silicone non-slip elements, an easy-to-read power indicator and comes with crocodile clips, charging cables and a user manual.
Suitable for
Field engineers and service technicians carrying compact test tools
Bench testing, circuit alignment and component checking in workshops
PLC, DCS and inverter troubleshooting and calibration
Educational labs and hobbyist electronics experiments
Key specifications
Manufacturer: FNIRSI
Model: SG-004A
Output frequency: up to 1 MHz
Output amplitude: 5 V
Accuracy: ≤0.2%
Screen: 2.4" LCD with adjustable brightness
Dimensions (W×D×H): 82 × 27 × 112 mm
Weight: 165 g
Battery: 3000 mAh, standby up to 24 hours
Interface: USB Type‑C
Included accessories: 4 crocodile clips, USB charging cable, Type‑C cable, user manual
How to use
Charge the device via the USB‑C port before first use. Power on, select the required operating mode and set the output frequency and amplitude using the front controls; mode backlighting indicates the active function. Connect the output using the supplied crocodile clips or appropriate test leads to the unit under test. Use the real‑time curve view to observe signal behaviour while adjusting parameters. After testing, power off and store the generator in a protective pouch or tool bag.
Usage recommendations
Use appropriate probes or isolated leads when working with live systems and follow instrument safety procedures. For consistent results, allow the SG-004A to warm up briefly after powering on and verify connections before applying signals to sensitive equipment.

## FAQ

### How much does the Signal generator Fnirsi SG-004A cost, and is it available for purchase?

The price is 125.49 € (valid at the time of publication and already includes all taxes). The item is available for order — 19 pcs. are in stock, and you can place your purchase right now with delivery across Latvia and Europe or choose pickup at the Riga collection point. We offer favorable purchase terms, including the option to split the payment into convenient monthly installments. Availability and price are updated in real time, so we recommend placing your order in advance.

### If I order this product today, when will I receive my order?

If you place your order today, delivery will be as fast and convenient as possible. You will be able to pick up your order on 09.07.2026 at the Riga pickup point or choose delivery across Latvia and Europe. We carefully inspect every purchase and pack it securely for safe transportation.

### What payment options are available?

AiO.lv offers several payment methods: Bank transfer, Bank cards on-line, Apple Pay, Google Pay, Installment. All transactions are 100% secure and encrypted.

### Can Signal generator Fnirsi SG-004A be purchased with a lease?

Yes, the purchase is available both on credit and with an interest-free installment plan. Learn more about installments and credit options: https://aio.lv/en/payment#b3

### Can this product be purchased for a company (with VAT)?

Yes. AiO.lv works with legal entities in Latvia and across Europe. The product price already includes VAT. For certain product categories, as well as for companies from other EU countries with a valid VAT number, a 0% VAT rate may apply. We issue the invoice immediately after the order is placed, support electronic BIS invoices, and automatically generate all necessary accounting documents. You can complete the purchase for a company online — simply select the company profile and choose bank transfer as the payment method during checkout.

### What is the warranty period?

All Fnirsi products come with an official 2 Years warranty. It covers all manufacturing defects and malfunctions that may occur during use. The warranty is valid at all authorized Fnirsi service centers and through AiO.lv

### Can the product be returned after purchase?

Yes, you can return the product within 14 days of purchase if you bought it as a consumer (not a legal entity). Returns are possible without giving any reason — the main condition is that the product retains its original appearance and full set of accessories. We will make the process as simple and convenient as possible: just contact our customer support team, and we will help you arrange the return.

### Where should I contact for warranty service?

For warranty-related questions you can contact the AiO.lv (SIA VSPRO) customer support team. More information about warranty service: https://aio.lv/en/warranty

## Image

https://aio.lv/img/cache/product/11618327/66826018_large.webp