Optimus+ Basic Sound Level Meter

Sound Level Meters

The Optimus+ Yellow is a basic sound level meter built to international standards (IEC 61672) and available as either Class 1 or Class 2 sound level meters.

  • Measures all key noise parameters simultaneously to save time
  • No complicated setup – just switch on, calibrate, and start measuring
  • Available as a data logging sound level meter
  • Choose from a Class 1 or Class 2 instrument
  • Bluetooth connectivity with Smartphone App for remote start
Instrument class *

Choose the Class of meter you would like

Meets IEC 61672-1:2013

Meets IEC 61672-1:2013

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SKU: CR:15xB
Tag: Sound Level Meters

Description

Optimus+ Yellow Sound Level Meter

A range of simple noise level meters for basic noise measurements

The Optimus+ Yellow is a range of basic sound level meters built to international standards (IEC 61672) and available as either Class 1 or Class 2 sound level meters. The range is the entry-point for Cirrus Research’s well-renowned Optimus+ range. The Optimus+ Yellow noise level meter is capable of measuring the maximum noise level during a session, and provides simple and easy-to-understand data, including frequency weightings and time history.

Most suited for applications where only basic noise level data is required, the Optimus+ Yellow can record the sound pressure level (SPL), maximum sound level (LMax) in decibels, which refers to the loudest recorded noise level during a period of data capturing, and on specific variants, allows for data logging of the sound levels measured over a user-defined period of time. This data will give you a basic understanding of the noise levels where you are measuring, and will allow you to identify any particular noise hotspots.

It has a bright and easy-to-read colour display allowing you to see the noise level in decibels (dB) in real-time on-screen, providing you with a clear and instant indication of the sound levels measured.

Remote Operation

Sometimes it’s not possible to hold the meter whilst taking measurements, this might be due to location, the noise level itself, or the length of time you want to measure for. The Optimus+ Yellow range includes Bluetooth connectivity to help solve this; with the addition of the dBActive smartphone app, you can easily operate your sound level meter from a short distance away.

VoiceTag | Audio Note Recording

Each of our data logging Optimus+ Sound Level Meters feature VoiceTag audio note recording, increasing the ease with which your NoiseTools database can be organised. Before each measurement, simply speak into the microphone to provide additional information such as the location of your reading. Once your measurement data is downloaded to NoiseTools, these audio notes are automatically converted into text.

Upgrade at anytime

The Class 1 variant of this meter has LNE Pattern Approval. See the Downloads tab for our certificate. Pattern Approval is a method where a test laboratory such as the LNE tests an instrument against a set of standard tests to ensure that it meets the performance claims of the manufacturer. Find out more here.

The Optimus+ Yellow Sound Level Meter Range

The Optimus+ Yellow Sound Level Meter is available in two models designed for applications where only basic noise level data is required. Upgrade this instrument at any time by contacting our team of experts.
Optimus+ Yellow

The Optimus+ Yellow is a basic sound level meter built to international standards (IEC 61672) and available as either Class 1 or Class 2 sound level meters.

Meets IEC 61672 international standard
Minimal controls for quick and easy use
Measures everything you need simultaneously
Bright colour display so the data is easy to read
Optimus+ Yellow with Data Logging

The Optimus+ Yellow with Data Logging is a basic sound level meter with data logging built to international standards (IEC 61672) and available as either Class 1 or Class 2 sound level meters.

Meets IEC 61672 international standard
VoiceTag audio note recording
Measures everything you need simultaneously
Data logging with up to 32GB of memory
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Basic Noise Assessments

Watch the product video to find out how the Optimus+ Sound Level Meter makes basic noise assessments easier than ever

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The perfect entry-level sound meter for basic noise measurements

The Optimus+ Yellow Sound Level Meter provides simple and easy-to-understand data for applications where only basic noise level data is required.

We want to make your job easier, so we designed to Optimus+ Yellow to offer the highest level of performance without the complicated setup.

Every parameter is measured simultaneously, so you can’t choose the wrong function or miss any data
All it takes is 3 button pushes to get the Optimus Yellow to start measuring. Switch On. Calibrate. Start. It’s that simple
With it’s large display, you can easily view your measurements on-screen

If you choose the data logging version of the Optimus+ Yellow, we’ll include our NoiseTools noise analysis software so you can keep a record of your measurements.

You can upgrade this instrument to an Optimus+ Red or Optimus+ Green at any time, future-proofing your investment.

Applicable Standards

IEC 61672-1:2013 Class 1 or Class 2

IEC 61672-1:2002 Class 1 or Class 2 Group X

IEC 60651:2001 Type 1 I or Type 2 I

ANSI S1.4 -1983 (R2006), ANSI S1.43 – 1997 (R2007)

ANSI S1.25:1991

Microphone

Class 1 MK:224 pre-polarized, Class 2 MK:216 pre-polarized

Microphone Preamplifier

MV:200 Removable Preamplifier (All versions)

Total Measurement Range:

20dB to 140dB RMS Single Range

Noise Floor: <18dB(A) Class 1, <21dB(A) Class 2 Frequency Weightings

RMS & Peak : A, C, & Z Measured Simultaneously

Time Weightings

Fast, Slow & Impulse Measured Simultaneously

Display

High resolution display. Ambient light sensor & illuminated keypad

Memory

4GB (B Version), 32GB factory fit option

AuditStore

Measurement verification data stored in secure memory

Time History Data Rates (Global settings)

10ms, 62.5ms, 125ms, 250ms, 1/2 sec, 1 sec, 2 sec (User selectable)

VoiceTag Audio Recording (B Version)

Up to 30 seconds of audio notes with each measurement

Measurement control

Pause & Back Erase with user selectable duration

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)

Tripod Mount

1/4″ Whitworth socket

Case

Material: High Impact ABS-PC with soft touch back & keypad

Environmental

Temperature: Operating -10°C to +50°C, Storage -20°C to +60°C

Humidity: Up to 95% RH Non Condensing

Electromagnetic performance

IEC 61672-1:2002 & IEC 61672-2:2003

Except where modified by EN 61000-6-1:2007 & EN 61000-6-1:2007

Language options

English, French, German, Spanish. Other language options may be available

Software Support

NoiseTools Download, Configuration & Analysis software supplied as standard. Compatible with Microsoft Windows XP, Vista, 7 & 8 (32bit & 64bit)

Displayed Functions

LXY, LXYMax, LXYMin

Measurement Run Time

Stored Functions

LXYMax & Time History of LXYMax

Time & Date of Measurement Start

where x=A ,C ,Z; y= F, S, I

Other functions may calculated by the NoiseTools software and displayed on download.

Additional information

Weight 0.30 kg
Dimensions 28.3 × 6.5 × 3.0 cm
Hardware Features

Bluetooth

Communication Interfaces

,

Compatible Applications

Memory

,

Power Supply Options

Average Operating Time

Sound Measurement Features

Applicable Standards

,

Total Measurement Range

Frequency Weightings

, ,

Time Weightings

, ,

Data Logging

Minimum Data Logging Interval

SPL

VoiceTag Audio Notes

Acoustic Fingerprint

Brand

Cirrus Research

Monitoring Duration

Short-term

Optimus+ Yellow Sound Level Meters

User Manual

Optimus+ Yellow Sound Level Meters

Datasheet (English)

Optimus+ Yellow Sound Level Meters

Datasheet (Chinese)

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