Brand |
Castle Group |
Application |
Environmental Noise, Noise at Work |
Features |
1/1 Octave Bands, Dose, Data Logging, Statistics |
Weightings |
A, C, Z |
Measurement Parameters |
Leq, (Percentiles) Ln's, Dose |
Castle Mirus Sound Level Meter System for Hire
Harnessing technology combined with a thoughtful insight into how people use it is the key to product development. The Mirus epitomises these concepts as well as using state of the art electronics and a clear user-interface to the world of sound level meters.
It is a very small instrument at 56mm wide and 20mm thing and has a full range of measurement capabilities. There is also a colour display, micro-SD memory card expansion and up to 24 hours running time and it only weighs 225g.
Features of the Mirus Sound Level Meter System:
- Low-cost Class 1 sound level meter meeting IEC 61672:2002
- Intended for general acoustic measurements, occupational health and environmental noise measurements
- Easy in use predefined setups
- Extremely simple Start/Stop mode
- Three parallel independent profiles
- 1/1 & 1/3 Octave Band Analysis
- Advanced time-history logging
- MicroSD memory card providing almost unlimited logging capacity
- Acoustic dose measurements
- Voice comments recording*
- Audio events recording*
- Self-vibration monitoring
- Revolutionary pocket size & light weight at only 225 grams
- OLED colour display with super brightness and contrast
- Robust casing and IP65 protection
Applications of the Mirus Sound Level Meter System
- Control of Noise at work Regulations 2005
- Environmental Noise (e.g. BS4142)
- Complaint Resolution Monitoring
- Noise for Planning
- Construction site noise
- Product Quality Testing
- Audio Installations
Technical Specification
Mirus Sound Level Meter
Standards | Class 1- IEC 61672-1:2002 |
Weighting Filters | A, B, C, Z |
Time Constants | Slow, Fast Impulse |
RMS Detector | Digital True RMS detector with Peak detection, resolution 0.1 dB |
Microphone | ACO 7052E, 35 mV/Pa, prepolarised 1/2” condenser microphone |
Calibration | Automatic calibration @ 114 dB/1 kHz |
Preamplifier | Detachable |
Linear Operating Range | 25 dBA RMS ÷ 140 dBA Peak (in accordance to IEC 61672) |
Total Dynamic Measurement Range | 15 dBA RMS ÷ 140 dBA Peak (typical from noise floor to the maximum level) |
Internal Noise Level | Less than 15dBA RMS |
Dynamic Range | >110dB |
Frequency Range | 10 Hz ÷ 20 kHz |
Meter Mode Results | SPL, Leq, SEL, Lden, Ltm3, Ltm5, LMax, LMin, LPeak plus “running Leq” up to 60 minutes. Simultaneous measurement in three profiles with independent set of filters and detectors |
Statistics | Ln (L1-L99), complete histogram in meter mode |
Data Logger | Time-history logging of summary results, spectra with adjustable double logging steps down to 100 s |
Audio Recording | Audio events recording, trigger and continuous mode, 12 kHz sampling rate, wav format (option) - (future feature) |
Voice Comments | Audio records on demand, created before or after measurement, added to measurement file (future feature) |
Basic Data
Ingress Protection | IP65 Rating (excluding microphone) |
Input | Preamplifier (60 UNS thread) |
Memory | MicroSD card 4 GB (removable & upgradeable) |
Display | Colour 96 x 96 pixels OLED type |
Keyboard | 8 Push Buttons |
Communication Interfaces | USB 2.0 Client RS232 Cable (optional) |
Power Supply | Four AAA alkaline or rechargeable NiMH batteries |
Operation Time | 16 h ÷ 24 h (depending on usage) |
USB Interface | 100 mA HUB |
Temperature Range | 10C to 50C |
Humidity | Up to 95% RH, non-condensed |
Dimensions | 232.5mm x 56 x 20mm (including microphone and preamplifier) |
Weight | Approx 225g with batteries |
Noise Dosemeter
Dosimeter Mode Results: SPL, Leq, SEL, LPeak, Dose, D-8h, Lav, SEL8, PSEL, E, E-8h, TWA, ’Peak Counter and more
Exchange Rate 2, 3, 4, 5, 6 (option)
Sound Analyser
1/1 Octave Analysis: Real-time analysis meeting Type 1 requirements of IEC 61260, centre
frequencies from 31.5 Hz to 16 kHz (option) available simultaneously with three profiles for broadband measurements (SLM), time-history logging and audio recording