NFC Signal Test Card 13.56MHz – 14-Level Tri-Color LED
NFC Signal Test Card 13.56MHz – 14-Level Tri-Color LED
NFC Signal Test Card – 13.56MHz RFID Field Strength Detector
Instantly visualize the field strength of any 13.56MHz NFC or RFID reader with this compact, battery-free signal test card. Whether you're developing NFC applications, calibrating access control systems, or running production-line quality checks, this card delivers clear, real-time feedback through its 14-level tri-color LED display — no batteries, no charging, no hassle. Made in Mainland China.
Key Features
- Battery-Free, Maintenance-Free Design: Powered entirely by contactless inductive energy from the reader — simply place the card near the device and it activates instantly. No charging or battery replacement ever needed.
- 14-Level Tri-Color LED Indicator: Red, blue, and green side-emitting LEDs provide a precise, at-a-glance visualization of NFC signal strength and field distribution across 14 graduated levels.
- Double-Sided Visibility: The standard credit-card-sized form factor (85.6 mm × 54 mm) features a double-sided display so you can read signal status from multiple angles — perfect for alignment and positioning tasks.
- Industrial-Grade PCB Material: Built from durable FR4 PCB, this card is wear-resistant and built to withstand repeated use in demanding development and production environments.
- Broad 13.56MHz Protocol Compatibility: Works seamlessly with mainstream NFC and RFID 13.56MHz protocols including ISO14443A/B and ISO15693, covering the most widely used standards in the industry.
- Wide Application Range: Ideal for NFC module development, reader field mapping, access control system testing, device signal calibration, and production-line quality assurance.
Specifications
| Material | PCB (FR4) |
| Color | Black |
| LED Colors | Red / Blue / Green |
| Power Supply | Inductive (battery-free) |
| Display Mode | 14-level tri-color side-emitting LEDs |
| Frequency | 13.56 MHz |
| Compatible Protocols | NFC / RFID 13.56MHz (ISO14443A/B, ISO15693) |
| Card Size | 85.6 mm × 54 mm (standard credit card size) |
| Thickness | 2.65 mm |
| Origin | Made in Mainland China |
How to Use
- Hold or place the NFC Signal Test Card near your NFC reader or RFID module.
- The card powers on automatically via inductive energy — no button press required.
- Observe the LED bar display: the more LEDs that illuminate, the stronger the detected field. Use the tri-color gradient to interpret signal distribution and optimize reader placement.
Package Contents
- 1 × NFC Signal Test Card (13.56MHz, 14-level tri-color LED)
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Note: Actual LED colors may appear slightly different depending on monitor brightness and settings. Please allow ±0.5 mm measurement tolerance for stated dimensions.
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Frequently Asked Questions
Q: Does the NFC Signal Test Card require a battery or any external power source?
A: No — the card is completely battery-free. It draws power inductively from the NFC or RFID reader's electromagnetic field, activating automatically the moment it is placed within range. This makes it truly maintenance-free with no charging or replacements needed.
Q: Which NFC and RFID frequencies and protocols does this test card support?
A: The card is designed for the 13.56MHz frequency band and is compatible with mainstream NFC/RFID protocols including ISO14443A, ISO14443B, and ISO15693 — covering the vast majority of contactless smart card, access control, and NFC development applications.
Q: What does each LED color on the 14-level display represent?
A: The tri-color LED bar uses three colors (red, blue, and green) to indicate different signal strength zones. As field strength increases, more LEDs illuminate sequentially across all 14 levels, giving you an immediate visual map of signal intensity and distribution around your reader or antenna.
Q: Can this card be used for production-line quality control?
A: Yes. The card's durable industrial-grade FR4 PCB construction and standard credit-card form factor make it well-suited for repetitive production-line use — including reader output verification, antenna alignment, and field coverage mapping during manufacturing quality inspection.
Production & Packaging Notice
To maintain high stock availability and fast shipping times, our items are sourced from multiple verified manufacturing facilities. While the core quality, materials, and product specifications remain identical, you may notice slight variations in the packaging design, manufacturing origin, or the wording of the printed instructions.