The Ideal Solution for Simple Noise Measurements Optimus Yellow Sound Level Meters
The Optimus yellow instruments are a range of state-of-the-art sound level meters that have been designed to meet the very latest standards for noise measurement instruments.
It has been purposed-designed for applications where only basic noise data is required, such as Sound Level (SPL) or Maximum Sound Level (Lmax). These applications include fire alarm testing, machinery servicing and noise ordinance enforcement.
See what the Optimus Yellow can do for you. Use the form to contact our Noise Experts today.
Why Choose Optimus Yellow?
- Backed by our 15 Year "No Quibble" Warranty for your peace of mind
- High Performance to Class 1 or Class 2 Standard
- Class 1 & Class 2 to IEC 61672-1:2013
- Class 1 & Class 2 to IEC 61672-1:2002
- Quick, Simple and easy to operate
- Fast, Slow & Impulse Time Weightings
- dB(A), dB(C) and dB(Z) Frequency Weightings
- VoiceTag™ voice note recording
- AuditStore™ measurement verification
- High resolution colour OLED display and back-lit keypad
- Measure up to 140dB(A) and 143dB(C) Peak with a single 120dB measurement range
- Pause & Back Erase as standard
- 4GB memory with the option of 32GB
- Long battery life
Noise Measurement Made Easy
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 OLED display, you can easily view your measurements
Downloading Your Data is Simple
If you need 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. View the full specifications on the product table below.
You can upgrade this instrument to an Optimus Red or Optimus Green at any time, future-proofing your investment. Contact our Noise Experts today to find out more.
Which Optimus Yellow is right for you?
There are 4 versions of the Optimus Yellow Sound Level Meters, 2 with Class 2 performance and 2 with Class 1 performance.
The table below shows the different versions and options available with each instrument.
You can also use our interactive Optimus Product Selector to find the best instrument for you.
| Instrument | Class 1 | Class 2 | Sound Level | Data Logging | VoiceTag | Software Support | Measurement Kit |
|---|---|---|---|---|---|---|---|
| CR:152A | Yes | Yes | CK:152A | ||||
| CR:151A | Yes | Yes | CK:151A | ||||
| CR:152B | Yes | Yes | Yes | Yes | Yes | CK:152B | |
| CR:151B | Yes | Yes | Yes | Yes | Yes | CK:151B |
More Information
Find out more
If you have any questions or if you would like any more information, please contact us and we will be pleased to help.
From the UK, contact us on 0845 230 2434.
From outside the UK, please contact us on +44 1723 891655.
You can also contact us via our contact form.
Downloads
Specifications
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 OLED 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)
Measurement Functions
CR:152A & CR:151A
Displayed Functions
LXY, LXYMax, LXYMin
Measurement Run Time
CR:152B & CR:151B
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.