Cirrus Research plc - Optimus+ Environmental Sound Level Meter

Built to UK, EU and international standards, the Optimus+ Environmental Sound Level Meter 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.

• Periodic LAeq and Ln values (e.g. L10, L90), LMax and LMin
• Easy to use, measures all parameters simultaneously
• Choose a Class 1 or Class 2 model
• VoiceTag audio notes and audio recording
• Available with tonal noise detection, 1:1 octaves or 1:3 octaves

The top-of-the-range Optimus+ Green has been specifically designed as an environmental noise meter and is perfect for measuring and monitoring exposure to noise pollution and environmental noise sources, including construction sites, windfarms and industrial operations.

Available as either a Class 2 or Class 1 sound level meter, built to IEC 61672, the Optimus+ Green environmental noise meter provides everything you need to measure both occupational and environmental noise, to the fullest extent. Capturing the full range of sound parameters simultaneously, there’s no other noise measuring instrument you need to measure and monitor exposure to environmental noise.

All Optimus+ Green environmental noise meters are integrating data logging instruments, providing noise data such as sound pressure level (SPL), Leq and Peak and TWA/Dose. Optional measurement parameters include 1:1 and/or 1:3 octave band filters, tonal noise detection, Ln values, and on-screen NR/NC curves.

Built to UK, EU, and international standards, the Optimus+ Environmental Noise Meter can be used anywhere in the world and is compatible with our range of weatherproof outdoor measuring kits, making it the comprehensive solution to your environmental noise monitoring needs whatever conditions you need to measure noise in. You can choose an outdoor kit with or without a modem for unattended measurements.

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.

Each of our Optimus+ Green Sound Level Meters feature Acoustic Fingerprint technology, allowing you to automatically record and store audio by configuring a set of detection templates and rules. You can store audio recordings as either 96kHz/32bit quality, 48kHz/24bit quality, or as standard 16kHz/16bit bit quality which can be used for replay and source identification.

When used with the Outdoor Environmental Noise Kit with Remote Access, the Optimus+ Green Sound Level Meter can communicate remotely and provide both data download and live noise information to NoiseTools. GPS location data is also provided allowing noise measurements to be stamped with the location, date and time.

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