The top of the range Optimus Green has been specifically designed as an environmental sound level meter and is perfect for measuring environmental noise and noise pollution.

The Optimus Green provides everything you need to measure both occupational and environmental noise to the fullest extent. With a range of features and functionality that allow you to measure multiple parameters simultaneously, there’s no other device you could need.

Built to UK, EU and international standards, the Optimus Green can be used anywhere in the world and is compatible with our range of outdoor measuring kits, making it the comprehensive solution to your environmental noise monitoring needs.


  • Includes everything you need for occupational noise measurements
  • Large screen makes the data incredibly easy to read
  • Lightweight and easy-to-hold shape designed for ease of use
  • Available as either a Class 1 or a Class 2 instrument
  • No complicated setup procedure – just switch on, calibrate and start measuring
  • Bluetooth connectivity, allowing you to use your device with a compatible smartphone
  • Environmental health officers
  • Health and safety officers and consultants
  • Airport and aircraft noise monitoring
  • Construction site noise monitoring
  • Wind farm noise monitoring
  • Entertainment venue noise monitoring

Applicable Standards

IEC 61672-1:2013 Class 1 or Class 2

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

IEC 60651:2001 Type 1 I or Type 2 I

IEC 60804:2000 Type 1 or Type 2

IEC 61252:1993 Personal Sound Exposure Meters

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

ANSI S1.25:1991

1:1 & 1:3 Octave Band Filters to IEC 61260 & ANSI S1.11-2004

Type Approvals for Class 1 Instruments

LNE-25387-1 IEC 61672-1:2013

    NF EN 61672-1:2014

    IEC 61260:1996

    NF EN 61260:1996

LNE-25387-0

    EN 61672-1:2003

PTB-1.53-4052960 DIN EN 61672-1:2003-10

    DIN EN 61672-2:2004-08

    DIN 45657:2005-03

Applus+ 02-001-B-62/13-R

    UNE-EN 61672-1:2005

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

Frequency Bands: 10 x 1:1 Octave Bands (31.5Hz to 16kHz, A, B & C variants)

Frequency Bands: 36 x 1:3 Octave Bands Measured (6.3Hz to 20kHz, B & C variants)

Frequency Bands: 33 x 1:3 Octave Bands Displayed (12.5Hz to 20kHz, B & C variants)

Additional Metrics: LAeq LF (20Hz to 200Hz) & Leq LF (20Hz to 200Hz)

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

Time History Data Rates (Global settings)

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

VoiceTag Audio Recording

Up to 30 seconds of audio notes with each measurement

Bluetooth

BLE compatible with Android and iOS devices.

Cirrus mobile applications available from Google Play and the App Store

Acoustic Fingerprint Audio Recording

Off, Manual, Threshold Triggered, Advanced Trigger

User options:

Studio Quality - 96kHz/32bit WAV format

Standard quality - 16kHz/16bit WAV format

Pre-Trigger function

Integrators

Three simultaneous "virtual" noise meters. Integrator 1 is preset to Q3 for Leq functions. Integrators 2 & 3 can be configured with the following:

Exchange Rate: 3, 4 or 5 dB

Threshold: 70dB to 120dB (1 dB steps)

Time Weighting: None or Slow

Criterion Level: 70dB to 120dB (1 dB steps)

Criterion Time: 1 to 12 hours in 1 hour steps

Integrator Quick settings

EU, OSHA HC & OSHA NC, OSHA HC & ACGIH, MSHA HC & MSHA EC, Custom 1 & Custom 2

Ln Statistical Values

14 independent statistical Ln values calculated from 1/16th LAF

7 preset to L1.0, L5.0, L10.0, L50.0, L90.0, L95.0 & L99.0

7 user defined Ln values. CR:172C & CR:171C allow for an additional 14 Ln values with independent time and frequency weighting.

Measurement control

Measurement control with user selectable duration of manual, 1 min, 5 min, 10 min, 15 min,30 mins, 1 hour, Lden

Automatic Synchronisation & Repeat

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

IEC 61672-1:2013 & IEC 61672-2:2013

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)

Measurement Functions

CR:1720 & CR:1710

Displayed Functions

LXY, LXYMax, LXYMin, LXeq, LCPeak, LAPeak, LZPeak, LCeq-LAeq, LXE, LAIeq

Graph of Short LAeq, LCPeak

Integrators 2 & 3: TWA, Dose%, Est Dose%

Measurement Run Time

Integrators 2 & 3: TWA, Dose%, Est Dose%

14 Statistical Ln values

Stored Functions

LXYMax & Time History of LXYMax

LAeq, LCeq, LZeq, LCPeak, LZPeak, LAPeak, LAIeq

Time History of LAeq, LCeq, LZeq, LCPeak, LZPeak, LAPeak, LAIeq

Integrators 2 & 3: LAVG , TWA. %Dose

Time History of LAVG

Ln Values: 14 independent statistical values

Audio recording during measurement

CR:172A & CR:171A

Displayed Functions

LXY, LXYMax, LXYMin, LXeq, LCPeak, LAPeak, LZPeak, LCeq-LAeq, LXE, LAIeq

Graph of Short LAeq, LCPeak

Integrators 2 & 3: TWA, Dose%, Est Dose%

Real-Time 1:1 Octave Bands (Graphical & Numeric)

NR & NC values & curves

Measurement Run Time

Integrators 2 & 3: TWA, Dose%, Est Dose%

14 Statistical Ln values

Stored Functions

LXYMax & Time History of LXYMax

LAeq, LCeq, LZeq, LCPeak, LZPeak, LAPeak, LAIeq

Time History of LAeq, LCeq, LZeq, LCPeak, LZPeak, LAPeak, LAIeq

Integrators 2 & 3: LAVG , TWA. %Dose

Time History of LAVG

1:1 Octave Bands:Overall Leq & Leq Time History for each band, NR & NC values & curves

Ln Values: 14 independent statistical values

Audio recording during measurement

CR:172B & CR:171B

Displayed Functions

LXY, LXYMax, LXYMin, LXeq, LCPeak, LAPeak, LZPeak, LCeq-LAeq, LXE, LAIeq

Graph of Short LAeq, LCPeak

Integrators 2 & 3: TWA, Dose%, Est Dose%

Real-Time 1:1 Octave Bands (Graphical & Numeric)

Real-Time 1:3 Octave Bands (Graphical & Numeric)

NR & NC values & curves

Measurement Run Time

Integrators 2 & 3: TWA, Dose%, Est Dose%

Leq LF (20Hz to 200Hz)

14 Statistical Ln values

Stored Functions

LXYMax & Time History of LXYMax

LAeq, LCeq, LZeq, LCPeak, LZPeak, LAPeak, LAIeq

Time History of LAeq, LCeq, LZeq, LCPeak, LZPeak, LAPeak, LAIeq

Integrators 2 & 3: LAVG , TWA. %Dose

Time History of LAVG

1:1 & 1:3 Octave Bands:Overall Leq & Leq Time History for each band, NR & NC values & curves

Ln Values: 14 independent statistical values

Audio recording during measurement

CR:172C & CR:171C

Displayed Functions

LXY, LXYMax, LXYMin, LXeq, LCPeak, LAPeak, LZPeak, LCeq-LAeq, LXE, LAIeq

Graph of Short LAeq, LCPeak

Integrators 2 & 3: TWA, Dose%, Est Dose%

Real-Time 1:1 Octave Bands (Graphical & Numeric)

Real-Time 1:3 Octave Bands (Graphical & Numeric)

Tonal Noise Detection in 1:3 Octave Bands

NR & NC values & curves

Measurement Run Time

Integrators 2 & 3: TWA, Dose%, Est Dose%

Leq LF (20Hz to 200Hz)

28 Statistical Ln values

Stored Functions

LXYMax & Time History of LXYMax

LAeq, LCeq, LZeq, LCPeak, LZPeak, LAPeak, LAIeq

Time History of LAeq, LCeq, LZeq, LCPeak, LZPeak, LAPeak, LAIeq

Integrators 2 & 3: LAVG, TWA. %Dose

Time History of LAVG

1:1 & 1:3 Octave Bands:Overall Leq & Leq Time History for each band, NR & NC values & curves

Tonal Noise Detection in 1:3 Octave Bands

Ln Values: 28 independent statistical values

Audio recording during measurement

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

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

What our customers say..

The Optimus enables me to simultaneously get all the noise data I need, assess arising noise issues, make decisions, act on them immediately and record what's happening.

Chris Selkirk (TechIOA)

It is a first class instrument and should be the prime tool of all environmental and occupational health officers...

Dr Philip Dickinson, Professor, Massey University, New Zealand

Product Datasheets


Related products and services

× Success! You have selected the CR:172B. Complete the form below for more information.

Get More Infomation

The information that you provide is processed in accordance with our Privacy Policy