# RFID reader Promag GP20 125 kHz EM4102 — 125 kHz EM4102 proximity reader, serial interface

**URL:** https://aio.lv/en/product--promag-gp20-10--3206268
**Data updated:** 2025-12-29 10:49 (EET)
**Category:** Barcode Scanners
**Manufacturer:** Promag
**Manufacturer code:** GP20-10
**EAN:** 5711045706462
**Warranty:** 18 Months
**Availability:** Available for order
**Price:** 52.99 €
**Prices and availability valid until:** 2026-07-14 23:59
**Price without VAT (21%):** 43.79 EUR
**Can be purchased by legal entities:** Yes (invoice)
**Buy:** https://aio.lv/en/product--promag-gp20-10--3206268

## Delivery options

| Delivery method | Delivery time | Cost |
|---|---|---|
| Office pickup (2b. Kengaraga str., Riga, Latvia, LV-1063) | 01.07.2026 | free |
| Pickup points | 06.07.2026 | 1.99 EUR |
| Courier delivery to door | 06.07.2026 | 4.99 EUR |

## Summary description

Promag GP20 is a 125 kHz EM4102 RFID proximity reader designed for reading low-frequency EM4102 tags and cards. It provides reliable short-range identification for access control, time attendance or asset tracking. Compact and easy to install, the unit offers a serial/standard interface for integration with controllers and systems, delivering straightforward tag reading and system connectivity.

## Long description

Promag GP20 is a compact 125 kHz EM4102 RFID proximity reader engineered for reading low-frequency EM4102 tags and cards. The device supports contactless identification at distances up to 20 cm and is supplied with an open cable end for flexible connection. It is suitable for integration with access control systems, time-and-attendance solutions, and basic asset tracking where short-range tag reading is required.
Advantages
The reader offers support for EM4102 125 kHz tags, multiple interface outputs including RS232 and Wiegand, and a built-in MSR ABA Track 2 magnetic stripe reader. Its small dimensions (43 × 15 × 78 mm) and open cable end simplify installation and wiring in tight spaces. The contactless reading capability up to 20 cm provides reliable identification for typical proximity applications.
Suitable for
 Access control doors and turnstiles
 Time and attendance terminals
 Simple asset tracking systems
 Integration with controllers via RS232 or Wiegand
Key specifications
 RF frequency: 125 kHz (EM4102)
 Read range: up to 20 cm (contactless)
 Interfaces: RS232, Wiegand
 Magnetic stripe: MSR ABA Track 2
 Dimensions (W×H×D): 43 × 15 × 78 mm
 Cable: open cable end
 Brand: Promag, MPN: GP20-10, EAN: 5711045706462
How to use
Connect the open cable end to the target controller or interface module according to the controller wiring diagram and the reader pinout. Configure the controller to accept Wiegand or RS232 input as required by your system. Place EM4102 tags or cards within the specified range (up to 20 cm) in front of the reader for reliable identification. If using the magnetic stripe function, swipe cards following the MSR ABA Track 2 orientation.
Usage recommendations
Install the reader in a sheltered location away from strong electromagnetic interference and metal obstructions to maintain stable read range. Verify wiring and interface settings before commissioning and test with sample tags and cards representative of those used in the installation.

## FAQ

### How much does the RFID reader Promag GP20 125 kHz EM4102 cost, and is it available for purchase?

The price is 52.99 € (valid at the time of publication and already includes all taxes). The item is available for order — 26 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 01.07.2026 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. All transactions are 100% secure and encrypted.

### 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 Promag 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 Promag 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/3206268/52455155_large.webp