Attributes

Brand	-
Category	Robotics / STEM Teaching Tools / Sensors
Origin	-
Communication Interface	RS485 / TTL
Measurement Range	30 dB to 130 dB
Accuracy	±1.5 dB
Frequency Weighting	A-Weighting
Operating Voltage	5V DC
Response Time	< 0.5 seconds
Operating Temperature	-10°C to 50°C
Microphone Type	Electret Condenser
Output Protocol	Modbus RTU
Application	Industrial Noise Monitoring

6 reviews

Anonymous

Mar 26, 2026

Rating: 4/5

Good value but needs calibration

The hardware is solid and the TTL output works well with our Arduino prototype. Just remember to apply a correction factor if you need lab-grade precision.

Anonymous

Mar 24, 2026

Rating: 4/5

Reliable monitoring solution

Been running this 24/7 for a month now. No drift observed yet. The A-weighting filter is appropriate for general environmental noise assessment.

Anonymous

Mar 22, 2026

Rating: 5/5

Perfect for our factory floor

We integrated this sensor into our existing SCADA system via RS485 without any issues. The readings are consistent and match our handheld calibrator closely.

Anonymous

Mar 16, 2026

Rating: 3/5

Works but documentation is sparse

The sensor itself functions as advertised, but the register map in the manual could be more detailed. Had to contact support to get the baud rate settings right.

Anonymous

Mar 15, 2026

Rating: 5/5

Excellent industrial grade module

Very stable readings even in environments with varying temperatures. The Modbus implementation is standard and easy to parse.

Anonymous

Mar 12, 2026

Rating: 5/5

Great for IoT projects

Compact size makes it easy to fit into custom enclosures. The response time is fast enough for real-time alerting systems.

5 FAQ

Q: Is the enclosure waterproof?

A: The PCB module itself is not waterproof. For outdoor use, please house it in an IP65-rated enclosure with a sound-permeable membrane.

Q: Does this module come with a built-in display?

A: No, this is a sensor module designed for integration into larger systems. It outputs data via RS485 or TTL and does not have a local screen.

Q: Can this be powered directly by a Raspberry Pi GPIO?

A: While the logic level is TTL compatible, we recommend using an external 5V power source to ensure stable microphone performance, especially if other peripherals are connected.

Q: What is the default baud rate for the RS485 connection?

A: The default baud rate is 9600 bps, but it can be configured to 4800, 19200, 38400, or 115200 via command registers.

Q: Does it support C-weighting frequency filtering?

A: Currently, this model only supports A-weighting, which is the standard for most environmental and occupational noise regulations.

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