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Cirrus Research · Optimus+ · Noise monitoring station

Outdoor Environmental Noise Kit (CK:671B / CK:675B / CK:681B / CK:685B)

Current

Weatherproof case housing an Optimus+ Environmental sound level meter with an MK:172 outdoor microphone, two batteries and a charger, for semi-permanent environmental and construction noise measurement of up to about twelve days per battery set. The Remote Access version adds a modem and GPS so that data and real-time alerts reach the MyCirrus cloud platform.

Specifications verified on .

Type
Noise monitoring station
Class
Class 1
Channels
1
Octave bands
1/1 and 1/3
Connectivity
modem (Remote Access version), GPS (Remote Access version), USB (meter download)
Weight
14100 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 — Outdoor Environmental Noise Kit (CK:671B / CK:675B / CK:681B / CK:685B)
SpecificationValue
IEC 61672-1 classClass 1
StandardsIEC 61672-1:2013 class 1 or class 2 (Optimus+ Environmental)
Pattern approvalsPTB (DIN EN 61672), optional, LNE (IEC 61672), optional
Measurement — Outdoor Environmental Noise Kit (CK:671B / CK:675B / CK:681B / CK:685B)
SpecificationValue
Channels1
Measurement range20 to 140 dB, single range (Optimus+ Environmental)
Frequency weightingsA, C, Z
Time weightingsF, S, I
Simultaneous weightingsYes
ParametersLAeq, Ln, Lmax, Lmin
Analysis — Outdoor Environmental Noise Kit (CK:671B / CK:675B / CK:681B / CK:685B)
SpecificationValue
Octave bands1/1 and 1/3
Audio recordingYes
Hardware — Outdoor Environmental Noise Kit (CK:671B / CK:675B / CK:681B / CK:685B)
SpecificationValue
MicrophoneMK:172 outdoor microphone
Detachable preamplifierYes
Outdoor microphone kitincluded: MK:172 outdoor microphone with protective cover
DisplayOptimus+ meter display inside the case
Battery2 x lead acid or lithium-ion batteries (user choice)
External power12 to 18 V DC; weatherproof mains power supply; solar
Autonomy on internal power12 days
Weight14100 g
Dimensions (mm)465 x 180 x 355
Connectivity and software — Outdoor Environmental Noise Kit (CK:671B / CK:675B / CK:681B / CK:685B)
SpecificationValue
Connectivitymodem (Remote Access version), GPS (Remote Access version), USB (meter download)
Remote controlMyCirrus cloud platform and MyCirrus Notifications app (Remote Access version)
SoftwareNoiseTools, MyCirrus, MyCirrus Notifications app

Variants

Variants of the Outdoor Environmental Noise Kit (CK:671B / CK:675B / CK:681B / CK:685B) as the manufacturer names them
VariantDifference
Outdoor Environmental Noise KitStandard kit without modem
Outdoor Environmental Noise Kit with Remote AccessAdds modem and GPS for remote download, location data and MyCirrus alerts

Where this data comes from

Manufacturer documents used for this record
KindDocumentAccessed
Product pageOutdoor Environmental Noise Kit with Remote Access
DatasheetEnvironmental Noise Measurement Kits datasheet (English)
ManualOutdoor Environmental Noise Kit 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-outdoor-environmental-noise-kit).

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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Read next

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