iBodyinfo BCM-4P 4-Electrode Measurement Module Technical Specifications (V1.1)

This document provides the official technical specifications for the iBodyinfo BCM-4P V1.1 4-Electrode Measurement Module. For your convenience, we recommend downloading the complete PDF version.

BCM-4P_Module_Technical_Specifications_V1.1.pdf

1. Module Overview

The BCM-4P is a core 4-electrode measurement module custom-designed for “Body Composition Analyzers.” It enables the most critical functions of such devices, including weight measurement, 4-electrode impedance measurement, body composition analysis, and overall physical assessment. The module also features a height measurement interface for easy integration of an ultrasonic sensor via a TTL serial port for automatic height acquisition.

2. Interface Descriptions

Important Note: This module is designed exclusively for 4-electrode measurements and cannot be used for 8-electrode systems.

2.1 Communication Interface

The module uses a 3-wire serial port with TTL 3.3V or 5V levels. The default baud rate is 115200, which can be modified via software commands. All measurement commands and results are transmitted through this interface.

2.2 Load Cell Sensor Interface

For connecting a 4-wire parallel beam load cell to provide a precise foundation for weight measurement.

Interface Driving Capability:

• Excitation Voltage: 3.3V
• Max Driving Current: 20mA
• A/D Resolution: 24 bit

Recommended Sensor Technical Specifications:

2.3 Impedance Measurement Interface

For connecting 4 electrodes to perform handheld measurements.

• Measurement Method: 4-Electrode Handheld Measurement
• Measurement Frequency: 50KHz
• Impedance Resolution: 0.1 Ω
• Impedance Measurement Error: ≤ 3%

2.4 Power Interface

• Input Voltage: DC 5V ±10%
• Input Current: < 500mA

3. Performance & Technical Specifications

3.1 Operating Environment

Recommended for use in general home and office environments. Avoid proximity to strong sources of electromagnetic interference, such as high-power motors.

3.2 Measurement Principle

Bioelectrical Impedance Analysis (BIA).

3.3 User Input Parameters

• Gender: Male / Female
• Age: 8 – 80 years
• Height: 80 – 230 cm
• Weight: 20 – 200 Kg

3.4 Measurement Output Metrics

• 25 Metrics Available: Includes Weight, Fat-Free Mass (FFM), Total Body Fat (TBF), BMI, Percent Body Fat (PBF), Protein, Minerals, Muscle Mass, Skeletal Muscle Mass (SMM), Bone Mineral Content (BMC), Total Body Water (TBW), ECW/ICW, Visceral Fat Index (VFI), BMR, Body Age (BDA), Waist-Hip Ratio, Overall Score, and guidance for weight/fat/muscle control.
• Weight Measurement: Range 5-200Kg, with an accuracy of ±0.1Kg.

3.5 Reliability Characteristics

The module has undergone rigorous reliability testing and complies with multiple IEC international standards.

3.6 ESD Characteristics

4. Module Application & Protocol

4.1 Usage Instructions

The module provides a 3-wire TTL serial port interface. An external circuit only needs to supply 5V power and a serial connection to perform all control and data retrieval operations.

4.2 Firmware Update

The module’s firmware can be upgraded via the serial port using the standard Ymodem transfer protocol, allowing for continuous algorithm and feature enhancements.

4.3 Communication Protocol

• Compatibility: The protocol is compatible with the BCM-H10 module. (Please contact technical support for the full protocol document).

5. Dimensions

• Module Size: 83.82 × 55.88 mm

6. Technical Support

• Contact: Mr. Li (Engineer)
• Phone: +86 18344460909
• WhatsApp: 8618344460909