Noise Detectors, Sensors, Meters: How to Measure Noise

Noise pollution is now the third-largest source of environmental pollution, following air and water. In daily life, excess noise disrupts sleep, affects concentration, and, at high levels, can even damage hearing. For a healthy environment, sound levels should not exceed 50 decibels during rest and 70 decibels during work. At 80 decibels, discomfort begins. Prolonged exposure to 120 decibels or more can lead to permanent hearing loss.

In construction sites, factories, and other industrial environments, the need for reliable noise monitoring is critical—not only for regulatory compliance but also to protect workers and the surrounding community.

The Hidden Dangers of Noise

Noise doesn’t just affect hearing. It can interfere with communication, suppress awareness of warnings or alarms, and increase the risk of accidents. This phenomenon, known as the masking effect, is especially dangerous in noisy workplaces. For example, in a pharmaceutical plant, machines like fans, grinders, and crushers may produce sound levels over 120 decibels. Without proper monitoring and mitigation, employees face long-term hearing damage and safety hazards.

What Is Industrial Noise Pollution?

Industrial noise pollution refers to sound produced by fixed equipment or processes that disrupt the surrounding environment. Common sources include:

• Airflow-related noise, such as from compressors and blowers
• Mechanical noise, caused by vibration or impact (e.g., looms, shredders)
• Friction noise, from grinding or cutting operations

To manage these risks, accurate and continuous noise monitoring is essential.

EcoSentec’s Industrial Noise Detectors

EcoSentec offers a complete line of noise sensors suited for a range of indoor and outdoor applications. Whether for fixed installation or mobile measurement, our detectors help monitor and control noise levels with precision.

1. Long Pole Noise Detector — ES-N601

This sensor is designed for fixed-point noise measurement and is often mounted on poles for roadside or industrial site use. It uses a high-sensitivity condenser microphone to capture sound accurately and offers a wide range of output options.

• Measuring range: 30–120 dB
• Accuracy: ±0.5 dB
• Frequency range: 20Hz–12.5kHz
• Response time: ≤3 s
• Output: TTL, RS485, 4–20mA, 0–5V, 0–10V
• Material: 304 stainless steel, weather-resistant

Applications: Roadside monitoring, industrial sites, public safety projects.

2. Wall-Mounted Noise Sensor — ES-N600

Designed for permanent indoor or semi-outdoor installation, this unit uses a built-in capacitive electret microphone to convert sound waves into electrical signals. The housing is made from waterproof, dustproof ABS plastic and is built for long-term operation.

• Measuring range: 30–120 dB
• Accuracy: ±0.5 dB
• Frequency range: 20Hz–12.5kHz
• Output: RS485, 4–20mA, 0–5V, 0–10V
• Response time: ≤3 s
• Stability: <2% over lifespan

3. Outdoor Noise Sensor — ES-A227

Designed specifically for long-term outdoor use, this sensor shares the same internal specifications as the wall-mounted model but features a high-strength radiation shield for weather protection (IP68 rated). It resists UV, rain, and snow, making it ideal for tough environments.

• Measuring range: 30–120 dB
• Accuracy: ±0.5 dB
• Frequency range: 20Hz–12.5kHz
• Output: RS485
• Housing: UV-resistant, solar radiation shield
• Power: 10–30V DC

Applications: Smart city systems, weather stations, outdoor construction sites, infrastructure monitoring.

Why Choose EcoSentec?

EcoSentec’s noise sensors combine precision, durability, and flexibility. Whether you’re building an integrated monitoring platform or looking for a standalone solution, our products offer:

• Fast response times
• High accuracy across a wide frequency range
• Rugged enclosures for challenging environments
• Flexible output formats for system integration
• Competitive pricing with reliable performance

OEM services are also available for tailored monitoring solutions.

Conclusion

Noise is more than a nuisance—it’s a public health and safety concern. From factory floors to public infrastructure, accurate and consistent noise measurement is critical. EcoSentec offers the tools to help monitor and manage sound levels, creating safer and more livable environments.

To learn more or request a consultation, contact our team.