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POLWAX SL50 Sound Level Transmitter

Sound Level Transmitters · Atmos Series

SL50 Sound Level Transmitter

Model SL50

Noise level transmitter, 30–120 dB with ±1.5 dB accuracy, 4–20 mA, 0–10 V or RS485 Modbus RTU output, IP65.

Range
30 dB to 120 dB
Accuracy
±1.5 dB
Outputs
4–20 mA, 0–10 V, RS485
Protection
IP65
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Overview

The POLWAX SL50 sound level transmitter monitors noise levels in real time in industrial, environmental and commercial settings. A precision electret condenser microphone covers 30–120 dB over 20 Hz–20 kHz, with 4–20 mA, 0–10 V or RS485 Modbus RTU output for integration with monitoring and control systems.

Key features

  • Measuring range 30–120 dB, resolution 0.1 dB
  • Precision electret condenser microphone
  • 4–20 mA, 0–10 V or RS485 Modbus RTU output
  • Wall or pole mounting
  • IP65 industrial ABS housing

Technical specifications

Measurement ranges & outputs

Measurement ranges and outputs
Measurement range30 dB to 120 dB
Accuracy±1.5 dB
Resolution0.1 dB
Response time≤30 seconds
Frequency range20 Hz – 20 kHz
Microphone typePrecision electret condenser microphone
Output options4-20 mA, 0-10 V, RS485 (Modbus RTU)

Power supply & connectivity

Power supply and connectivity
Communication protocolModbus RTU
Power supply12 V – 24 V DC

Installation & environment

  • Wall or pole mounting using standard brackets.
Installation and environment
Mounting optionsWall mount, pole mount
Housing materialIndustrial-grade ABS
Protection ratingIP65 (water-resistant and dustproof)
Operating temperature-10 °C to 60 °C
Storage temperature-20 °C to 80 °C
Humidity range0–95 % RH (non-condensing)

Order code

CodeOption
Output 000-10 V
Output 01RS485
Output 024 - 20 mA
Range 10130 - 120 dB

Example: SL50 -01-101

Specifications are subject to change. Please check the current datasheet or ask our team before ordering.

Technical resources

SL50 Sound Level Transmitter

Access product datasheets, user manuals, software and technical documentation in your preferred language.

Technical Datasheets

User Manuals

Product enquiry

Request a quote for SL50 Sound Level Transmitter

Tell us about your application — what you need to measure, the range, number of points and where the instrument will be installed. Our team will reply with a recommendation and quotation.

  • Technical advice on model and options
  • Quotation for your quantity
  • Datasheets and documentation on request

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Resolution
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Outputs
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Protection
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Interface
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Supply
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Protection
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