For Global Original Equipment Manufacturers (OEMs) and System Integrators, the component selection process is a balancing act. You need reliability, precision, and—most importantly—compatibility. When adding environmental noise monitoring capabilities to your smart city pole, industrial PLC system, or environmental data logger, you cannot afford a "black box" that fights your architecture.
Enter the CODA Noise Sensor. Designed explicitly as an OEM noise sensor module, CODA is built to disappear into your system, providing high-fidelity acoustic data through the industry-standard interfaces you already use.
Here is your sensor integration guide to the electrical interfaces, communication protocols, and mechanical footprint that make CODA the "plug-and-play" choice for global developers.
Whether you are connecting to a modern IoT gateway or a legacy industrial controller, CODA offers versatile output options to match your hardware ecosystem.
For data-rich applications, our RS485 interface is the standard.
Daisy-Chaining: Easily network multiple sensors on a single bus.
Cable Length: Supports long-distance transmission (up to 1200m) without signal degradation, ideal for sprawling industrial plants or mining sites.
Interference Immunity: Differential signaling ensures robust performance in electrically noisy environments.
For direct integration with PLCs, SCADA systems, or standard data loggers, CODA operates as a high-precision 4-20mA noise transducer or Voltage output device.
Current Loop (4-20mA): The industry standard for interference-free long-distance transmission.
Mapping: 4mA = 30dB, 20mA = 130dB (Customizable ranges available).
Voltage Output (0-5V / 0-10V): Simple, linear voltage outputs for general-purpose A/D converters and microcontrollers.

Hardware connectivity is useless without a common language. CODA supports the two most dominant protocols in the industrial and environmental sectors.
As a native Modbus RTU noise sensor, CODA integrates seamlessly with HMI screens, PLCs (Siemens, Allen-Bradley, Mitsubishi), and SCADA systems.
Standard Register Map: We provide a transparent register map. Read Decibels (dB), Frequency Weighting (A/C/Z), and Time Weighting (Fast/Slow) directly from specific holding registers.
Configurability: Change slave IDs and baud rates (9600, 19200, etc.) over the bus to avoid address conflicts in complex networks.
For low-power, remote environmental telemetry stations (like Campbell Scientific or onset loggers), CODA supports the SDI-12 protocol.
Sleep Mode: Optimized for battery and solar-powered setups, waking up only when polled by the data logger.
We understand that real estate inside your enclosure or on your mounting bracket is limited.
Compact Footprint: The CODA module is minimized to fit into tight spaces without sacrificing sensor diaphragm size.
Mounting: Features standard M-thread mounting holes or bracket compatibility for easy attachment to poles, walls, or machine chassis.
Durability: The microphone capsule is protected by a specialized wind cap and weather-proof housing, ensuring the sensor survives the same harsh conditions as your host equipment.
We view our relationship with OEMs as a partnership. To ensure a smooth "Hello World" experience, we provide:
Wiring Diagrams: Clear, color-coded schematics for 2-wire, 3-wire, and 4-wire setups.
API & Register Documentation: Comprehensive guides detailing every Modbus register address and SDI-12 command.
Calibration Certificates: Every unit ships with factory calibration data to ensure your system meets Class 2 or Class 1 standards out of the box.
Don't let acoustic monitoring be the bottleneck in your product development. Whether you are building a construction dust monitoring station that needs noise data, or a smart factory dashboard, CODA provides the interfaces (RS485, 4-20mA) and protocols (Modbus, SDI-12) to make integration effortless.
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Contact: Molly
Phone: +86-17775769236
Tel: 86-0731-85117089
Email: molly@codasensor.com
Add: Building S5, Aux Square, Yuelu District, Changsha City, Hunan Province, China
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