Sound Level Meter | Environmental & Occupational Noise
Measure. Monitor.
Mitigate. Instantly.
A portable, high-accuracy sound level meter for environmental and occupational noise surveys. Enables compliance, risk management, and safer workplaces.
Cirrus Sound Level Meters are handheld instruments used to measure environmental and occupational noise levels. Depending on the model (e.g., MK427 or MK440), features may include Class 1 accuracy, real-time octave band analysis, data logging, audio recording, and integration with reporting software. They are used for noise surveys, legal compliance, and environmental monitoring.
They allow detailed noise surveys, real-time analysis, and reliable reporting for compliance purposes. The value for the customer is that they enable informed decisions about workplace safety, environmental noise management, and risk mitigation, helping organisations prevent hearing damage, avoid regulatory penalties, and maintain operational efficiency.
Features
High Accuracy
Class 1 precision for reliable measurements.
Real-time Logging
Captures and stores noise data for compliance.
Octave Band Analysis
Identifies frequency-specific noise risks.
Audio Recording
Records sound events for later review.
Portable Design
Lightweight and rugged for field use.
SmartMine Integration
Automates reporting and risk management.
Why Mines Choose Sound Level Meters
Measure. Monitor. Mitigate. Environmental and occupational noise is a silent hazard underground. Cirrus sound level meters give mines the accuracy and insight needed to manage noise risks effectively.
Portable and rugged, these meters provide real-time measurements and data logging, allowing teams to identify hotspots, plan interventions, and maintain compliance. Linked with SmartMine, noise surveys and reports can be automated and easily integrated into operational risk management systems.
Bottom line: Safer work environments, informed mitigation strategies, regulatory compliance, and reduced long-term hearing risk.
Engineering Features
Class 1 accuracy (IEC 61672)
Real-time octave band analysis
Data logging and audio recording
Portable, handheld design
Battery powered for field use
Integration with SmartMine and reporting software
Technical Specifications
| <strong>PARAMETER | <Strong>VALUE / UNIT |
|---|---|
| Accuracy | Class 1 |
| Octave Bands | Yes |
| Data Logging | Yes |
| Audio Recording | Yes |
| Battery Life | Up to 12 hours |
| Weight | ~500 g |
Information
| Microphone | Class 1 MK:224 pre-polarized, Class 2 MK:216 pre-polarized |
| Total Measurement Range | 20dB to 140dB RMS Single Range Noise Floor: <18dB(A) Class 1, <21dB(A) Class 2 |
| Time Weightings | Fast, Slow & Impulse Measured Simultaneously |
| Display | High resolution OLED display. Ambient light sensor & illuminated keypad |
| Memory | 4GB with 32GB factory fit option |
| Auditstore | Measurement verification data stored in secure memory |
| Voicetag Audio Recording | Up to 30 seconds of audio notes with each measurement |
| Bluetooth | BLE compatible with Android and iOS device |
| Acoustic Fingerprint Audio Recording | Off, Manual, Threshold Triggered, Advanced Trigger |
| Dimensions |
Size: 283mm x 65mm x 30mm
Weight: 300gms/10oz |
| Batteries | 4 x AA Alkaline |
| Battery Life |
Typically 12 hours with Alkaline AA
Typically 20 hours with Lithium AA Non-Rechargeable Battery life is dependent upon the battery type, quality & screen brightness |
| Connections |
USB Type B to PC
AC & DC Output via ZL:174 (2 x Phono, 1m) Multi-pin IO for external power via ZL:171 cable (2.1mm socket) External Power: 5v-15v via MultiIO socket via ZL:171 cable (2.1mm socket) |
| Language Options | English, French, German, Spanish. Other language options may be available |
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