125khz rfid reader writer
December 22, 2025
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<h1>125kHz RFID Reader Writer: A Comprehensive Guide to Low-Frequency RFID Technology</h1>
<p>In my years of working with access control systems, I've found that <strong>125kHz RFID reader writer</strong> units remain incredibly reliable for basic, short-range applications. Their simplicity is their strength. I recall a project where we needed a durable system for a warehouse time-and-attendance log. The environment was harsh, but the 125kHz cards and readers performed flawlessly for years with minimal maintenance. This personal experience solidified my view that while higher-frequency technologies offer more features, the robustness of 125kHz for specific use cases is undeniable.</p>
<h2>Technical Specifications and Core Parameters</h2>
<p>When selecting a <strong>125kHz RFID reader writer</strong>, understanding its technical foundation is crucial. My skill in system integration has taught me to always verify these specs against the project's environmental and functional needs. Below are the detailed technical indicators and parameters for a typical module. <em>Please note: These technical parameters are for reference data only. For exact specifications, you need to contact backend management.</em></p>
<h3>Detailed Module Parameters</h3>
<h4>Physical and Electrical Specifications</h4>
<ul>
<li><strong>Operating Frequency:</strong> 125 kHz ± 5 kHz</li>
<li><strong>Supported Protocols:</strong> EM4100, EM4102, EM4205, TK4100</li>
<li><strong>Read Range:</strong> 5 cm to 10 cm (dependent on antenna size and tag type)</li>
<li><strong>Communication Interface:</strong> UART (TTL level: 3.3V/5V), RS232, USB (model dependent)</li>
<li><strong>Baud Rate:</strong> Configurable: 9600, 19200, 38400, 57600, 115200 bps</li>
<li><strong>Power Supply:</strong> DC 5V/12V (±10%), typical current: 80-150mA</li>
<li><strong>Antenna:</strong> Integrated or external; typical external antenna dimensions: 85mm x 54mm x 3mm (L x W x H)</li>
<li><strong>Main Control Chip:</strong> Often based on dedicated reader ICs like U2270B or similar, with a secondary MCU (e.g., STM32F103C8T6) for processing and communication.</li>
<li><strong>Operating Temperature:</strong> -20°C to +70°C</li>
<li><strong>Output Data Format:</strong> 10-digit ASCII card ID (for EM4100 compatible tag
The Use of RFID for Human Identity Verification
<p>In my years of working with access control systems, I've found that <strong>125kHz RFID reader writer</strong> units remain incredibly reliable for basic, short-range applications. Their simplicity is their strength. I recall a project where we needed a durable system for a warehouse time-and-attendance log. The environment was harsh, but the 125kHz cards and readers performed flawlessly for years with minimal maintenance. This personal experience solidified my view that while higher-frequency technologies offer more features, the robustness of 125kHz for specific use cases is undeniable.</p>
<h2>Technical Specifications and Core Parameters</h2>
<p>When selecting a <strong>125kHz RFID reader writer</strong>, understanding its technical foundation is crucial. My skill in system integration has taught me to always verify these specs against the project's environmental and functional needs. Below are the detailed technical indicators and parameters for a typical module. <em>Please note: These technical parameters are for reference data only. For exact specifications, you need to contact backend management.</em></p>
<h3>Detailed Module Parameters</h3>
<h4>Physical and Electrical Specifications</h4>
<ul>
<li><strong>Operating Frequency:</strong> 125 kHz ± 5 kHz</li>
<li><strong>Supported Protocols:</strong> EM4100, EM4102, EM4205, TK4100</li>
<li><strong>Read Range:</strong> 5 cm to 10 cm (dependent on antenna size and tag type)</li>
<li><strong>Communication Interface:</strong> UART (TTL level: 3.3V/5V), RS232, USB (model dependent)</li>
<li><strong>Baud Rate:</strong> Configurable: 9600, 19200, 38400, 57600, 115200 bps</li>
<li><strong>Power Supply:</strong> DC 5V/12V (±10%), typical current: 80-150mA</li>
<li><strong>Antenna:</strong> Integrated or external; typical external antenna dimensions: 85mm x 54mm x 3mm (L x W x H)</li>
<li><strong>Main Control Chip:</strong> Often based on dedicated reader ICs like U2270B or similar, with a secondary MCU (e.g., STM32F103C8T6) for processing and communication.</li>
<li><strong>Operating Temperature:</strong> -20°C to +70°C</li>
<li><strong>Output Data Format:</strong> 10-digit ASCII card ID (for EM4100 compatible tagPhone: +86 19925232774
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