Overview
The Enviro Testers Ceiling Noise Sensor is a professional-grade sound detection device ideal for environmental, industrial, and workplace noise monitoring. With a frequency range of 20 Hz to 12.5 kHz and accuracy of ±0.5 dB, it ensures reliable readings. Its multi-output compatibility (RS485, MODBUS, analog) supports integration with various systems. Designed with an IP68 enclosure, it operates efficiently in harsh environments. Compact at 100 × 50 × 50 mm and lightweight at 0.5 kg (1.1 lb), it is easy to install and maintain.
Features
- High-precision noise sensor with ±0.5 dB accuracy at reference 94 dB/1 kHz
- Wide measurement range 30–120 dB (extended up to 150 dB for industrial use)
- Multiple output modes: RS485, MODBUS, TTL, 4–20 mA, 0–5V, 0–10V
- Fast response time ≤3 seconds with long-term stability (<2% drift)
- Durable IP68-rated housing suitable for indoor and industrial applications
- Compact, lightweight design with easy ceiling or bracket mounting
Technical Specifications
| Type | Noise Sensor |
| Theory | Capacitance Principle |
| Frequency Range | 20 Hz ~ 12.5 kHz |
| Measuring Range | 30 dB ~ 120 dB (supports up to 150 dB) |
| Resolution | 0.1 dB |
| Noise Accuracy | ±0.5 dB (94 dB @ 1 kHz reference) |
| Response Time | ≤3 s |
| Stability | Less than 2% over life cycle |
| Output Signal | RS485 / MODBUS / TTL / 4-20 mA / 0-5V / 0-10V |
| Communication Protocol | ModBus-RTU (UART or RS-485, N 8 1) |
| Output Voltage | Low: ≤0.7V; High: 3.25–3.35V |
| DC Power Supply | 10 ~ 30V DC |
| Power Consumption | 0.1W |
| Operating Temperature | -20°C to +60°C (-4°F to +140°F) |
| Operating Humidity | 0%RH ~ 80%RH |
| Mounting Type | Bracket / Ceiling Mount |
| Material | PI68 grade housing |
| Package Size | 100 × 50 × 50 mm (3.9 × 2 × 2 in) |
| Weight (Gross) | 0.5 kg (1.1 lb) |
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