Complete white cleanroom noise level sensor with black measurement microphone cap

Cleanroom Control and Environmental Monitoring Systems

Noise Sensor

A fixed sound-level sensor that converts cleanroom acoustic pressure into a continuous weighted noise value for trend monitoring and alarms.

Measurement Microphone
Continuous dB Output
Frequency and Time Weighting
Remote Alarm Integration

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Product Introduction

The cleanroom noise level sensor combines a measurement microphone, preamplifier and digital signal processing in a wall or ceiling transmitter. Selected frequency and time weighting produce a consistent sound-level value for room trends, occupational studies or equipment-noise alarms. The microphone is protected by an acoustically transparent cap that can be inspected or replaced. Analog and digital outputs transfer the measured level without streaming room audio, preserving the function as a sound-pressure monitor rather than a recording device.

Key Features

A calibrated measurement microphone responds predictably across the selected acoustic band.

Configurable frequency and time weighting supports different monitoring objectives.

Continuous dB output reveals gradual equipment-noise changes as well as threshold events.

The transmitter reports numeric sound level without capturing intelligible audio recordings.

Customer Product Concerns

Fixed noise monitoring must distinguish meaningful changes from short impacts and must not be confused with voice recording.

Brief door impacts create repeated high-noise alarms.Appropriate time weighting and alarm delay reduce response to momentary events.

Microphone dust protection changes the acoustic response.An acoustically specified protective cap maintains airflow while shielding the element.

Staff assume the device records conversations.The output is limited to sound-level data and status rather than audio content.

A rising fan or bearing noise is noticed only after failure.Long-term dB trends reveal persistent changes relative to the established room baseline.

Typical Applications

Cleanroom equipment noise trendingLaboratory acoustic monitoringOperator comfort assessmentFan and bearing condition indication

Technical Parameters

Typical construction values for a fixed cleanroom noise level sensor are shown below.

Core Material	Electret or MEMS measurement microphone with FR-4 processor board in polycarbonate enclosure
Panel Thickness	35-70 mm transmitter depth
Effective Width	90-150 mm housing width
Maximum Length	Up to 220 mm housing length with microphone head
Steel Facing Thickness	0-0.8 mm; optional stainless microphone guard
Core Density	1180-1220 kg/m³ for polycarbonate transmitter housing
Thermal Conductivity	0.19-0.22 W/(m·K) for polycarbonate enclosure material
Surface Finish	Smooth white housing with black acoustic cap and blue status indicator
Joint Type	Wall or ceiling bracket with replaceable microphone cap and rear output terminal
Customization	Available based on the intended application and operating environment.

Available Options

A or C frequency weightingFast or slow time weightingAnalog or digital outputLocal alarm indicator

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