4-20mA Analog Sound Level Detector High Precision Industrial Noise Transmitter

Built-in condenser electret microphone converts sound pressure variations into proportional voltage signals with stable output, ensuring consistent readings across long-term deployments.

A-weighting filters the frequency response to match human auditory sensitivity, producing dB(A) readings that correlate directly with perceived loudness for occupational and environmental compliance.

RS485 model measures from 30dB quiet ambient up to 130dB, while analog output covers 30 to 120dB, spanning the full range from library silence to heavy industrial machinery noise levels.

Accuracy specified at a defined 94dB at 1kHz reference condition, providing a traceable benchmark comparable to IEC sound level meter calibration standards.

Wide frequency range captures low-frequency machinery rumble and high-frequency mechanical noise within a single sensor, eliminating the need for frequency-specific instruments.

Internal temperature compensation circuit actively corrects measurement bias caused by ambient temperature changes, maintaining accuracy across the full -20 to 60 degrees C operating range.

Signal drift across the full product lifecycle is kept below 2%, ensuring consistent noise readings over years of continuous deployment without recalibration.

All housing joints are sealed with waterproof strips inside a high-density shell rated IP65, protecting against rain, dust, and splashing water in outdoor construction and industrial environments.

RS485 variant draws only 0.4W while analog outputs consume up to 1.2W, both on a wide 10 to 30VDC input, enabling flexible power supply selection based on deployment infrastructure.

Connects to Renke's free cloud platform for real-time remote data viewing, historical data export, and multi-sensor centralized management via both PC browser and mobile app.