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Cirrus Research · Quantum · Noise monitoring station

Quantum Outdoor (CR:920)

Current

Pole- or wall-mounted Class 1 outdoor noise monitor with a built-in 4G modem, WiFi, Ethernet and Bluetooth, sending measurements, triggered audio and alerts to the MyCirrus cloud platform. Measures all weightings in parallel with 1:1 and 1:3 octave bands, runs on PoE, 12 to 18 V DC or solar with a leisure battery, and accepts optional Gill weather, air quality and ground vibration sensors.

Specifications verified on .

Type
Noise monitoring station
Class
Class 1
Channels
1
Octave bands
1/1 and 1/3
Connectivity
4G (3G fallback), factory-fitted multi-network SIM, Ethernet, WiFi 2.4 and 5 GHz, Bluetooth
Weight
5000 g
Compare with other instrumentsAll noise monitoring stations

Specifications

As published by Cirrus Research. Fields the manufacturer does not publish are omitted rather than estimated.

Standards and class — Quantum Outdoor (CR:920)
SpecificationValue
IEC 61672-1 classClass 1
StandardsIEC 61672-1:2013 class 1, IEC 61260:1995 (1:1 and 1:3 octave band filters), ANSI S1.4-1983 (R2006), ANSI S1.43-1997 (R2007), ANSI S1.11-2004, EN 61000-6-3:2007+A1:2011, EN 61000-6-1:2007
Measurement — Quantum Outdoor (CR:920)
SpecificationValue
Channels1
Measurement range20 to 140 dB RMS, single range
Frequency range6.3 Hz to 20 kHz (1:3 octave bands)
Frequency weightingsA, C, Z
Time weightingsF, S, I
Simultaneous weightingsYes
ParametersLAeq, LCeq, LZeq, LCeq-LAeq, LAE, LEX,8h, LAFmax, LASmax, LCpeak, LZpeak, LAF1, LAF5, LAF10, LAF50, LAF95, LAF99, LAeq,T1 and LAeq,T2
Analysis — Quantum Outdoor (CR:920)
SpecificationValue
Octave bands1/1 and 1/3
Audio recordingYes
Logging and data — Quantum Outdoor (CR:920)
SpecificationValue
Shortest logging interval10 ms
Hardware — Quantum Outdoor (CR:920)
SpecificationValue
MicrophoneMK:224 1/2" free-field pre-polarised electret
Outdoor microphone kitintegrated weatherproof housing; pole mount standard, BK:901 wall mounting kit
Weather sensorsYes
Displaynone
External powerPoE IEEE 802.3af (37 to 57 V DC); 12 to 18 V DC at 1.5 A; optional all-weather PSU; solar panel with leisure battery; consumption below 8 W
Weight5000 g
Dimensions (mm)200 x 850 x 122
IP ratingIP65
Operating temperature (°C)-10 to 50
Connectivity and software — Quantum Outdoor (CR:920)
SpecificationValue
Connectivity4G (3G fallback), factory-fitted multi-network SIM, Ethernet, WiFi 2.4 and 5 GHz, Bluetooth
Remote controlMyCirrus cloud platform (Quantum portal) and MyCirrus mobile apps
SoftwareMyCirrus, NoiseTools, MyCirrus app

Where this data comes from

Manufacturer documents used for this record
KindDocumentAccessed
Product pageQuantum Outdoor - Cloud-based Outdoor Noise Monitor
DatasheetQuantum Outdoor datasheet (English)
ManualQuantum Outdoor user manual (English)

Verified on . Only the manufacturer’s own published material is used; distributor pages are not sources.

Spec out of date? Tell us (reference cirrus-quantum-outdoor).

Verified owner reviews

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Known issues and firmware notes

Hardware and firmware problems reported by owners, with the firmware version concerned and any manufacturer response.

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Feature requests

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