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Outdoor Environmental Noise Measurement Kit

Outdoor Noise Kit
Outdoor Noise Kit
Outdoor Noise Kit Outdoor Noise Kit

Price List

USD $7794.00
Outdoor noise measurement kit - Class 1 with meter, calibrator, software, case
In stock

USD $6697.00
Outdoor noise measurement kit - Class 2 with meter, calibrator, software, case
In stock

The delivery price is calculated during checkout based on your location and the goods ordered. Our basic delivery prices are:

Delivery within India: $82.00

Delivery Service: Five working days*

* For products that are in stock and the order received by midday.

Some products go through a final configuration and calibration before being shipped. If the calibration labs are busy this can add up to two days on to the delivery schedule but guarantees a fresh calibration.

USD $7794.00
Outdoor noise measurement kit - Class 1 with meter, calibrator, software, case
In stock

USD $6697.00
Outdoor noise measurement kit - Class 2 with meter, calibrator, software, case
In stock


  • Weatherproof case and outdoor microphone
  • Sound level meter and Calibrator
  • 12 day battery or external power
  • All measurements made simultaneously
  • Audio recording
  • All parts & software included
  • 15 Year Warranty


  • Environmental noise surveys
  • Community noise assessments
  • Construction and demolition sites
  • Factory and industrial site boundary noise
  • Road traffic and other transport noise


The WPK Outdoor Noise Measurement Kits are designed for outdoor applications, where a meter needs to be left unattended in poor weather conditions to monitor for up to a week:

These noise measurement kits include a Sound Level Meter that was designed specifically for environmental noise measurement. The meter meets the sound level meter standards to Class 1 and makes all the measurements required by most such surveys, including the periodic LAeq and the statistical Ln parameters (L10, L90, etc).

The meter makes automatic repeating measurements, providing the tables of periodic results typically needed for this type of survey.

Our Recommendation

For most environmental noise surveys we recommend the WPK1710 Outdoor Kit, which is the lower cost version of the Class 1 kits. The meter in this kit includes the environmental noise parameters (Leq, Ln, etc), automatic timed measurements and audio recording.

For an overview of the other meters available please see the Which Meter tab.

Audio Recording

The sound level meter can be set to record the audio when certain conditions are met (a threshold level for example). Listening to a recording makes it easier to identify to source of the noise - road traffic? people talking? machinery?


The sound level meter included in this kit is suitable for almost any noise measurement application, not just environmental noise, as it exceeds the requirements of most regulations such as those covering occupational noise. If you have additional applications as well as your environmental noise monitoring then these meters will usually be suitable for that too.

General Environmental Noise Survey

These kits are designed to be left unattended for up to seven days, making automatic and repeating measurements. For example, many surveys require repeating 15 minute measurements, providing parameters such as:

  • LAeq (A-weighted average sound level)
  • LAmax (maximum sound level, either Fast or Slow time weighted
  • LAmin (minimum sound level, either Fast or Slow time weighted)
  • Ln (statistical parameters or "percentiles", such as LA10 and LA90)

Construction and Demolition Site Noise

For medium term noise monitoring in and around sites during construction and demolition work. For longer term monitoring we recommend the EM2030 Environmental Noise Monitor. For monitoring over a few weeks or months the Outdoor Kit should be ideal. The kit can be set up at a suitable location and left to run for a week. At this point you can take it back to the office to download and recharge, or take a laptop out along with a recharged batteries to swap (additional batteries are not included).

The noise measurements required on construction sites tend to include the periodic LAeq and LA90.

Boundary Noise Monitoring

For short term and mobile boundary noise monitoring, this application is very similar to Construction Noise (described above). Noise limits may be set by a local authority, demanding that noise levels be monitored 24 hours around a site, sometimes at multiple locations. The measurement of LAeq and LA90 is normally required.

Longer term monitoring at fixed locations can be achieved with the EM2030 Noise Monitoring.

Road Traffic, Transport and City Noise

The Outdoor Noise Kit can be easily relocated, making short term (up to one week) measurements at multiple locations much easier. Monitoring the noise at the roadside or by rail links or airports usually demands the measurement of the LAeq, LA90 and LA10, all of which are carried out simultaneously on the Optimus Green range of meters, as included with this kit.

Frequency Analysis for Tonal Noise

If environmental noise has a tonal content then it is sometimes necessary to measure it with 1/3 Octave Band Filters. The meter in this kit does not include either 1/3 octaves or tonal noise detection. For those applications please select one of the following:

The Meter in this Kit

All the WPK17xx outdoor kits come with an Optimus Green Sound Level Meter. The WPK kits on this page include either the CR1710 Class 1 meter or the CR1720 Class 2. Most applications demand the Class 1.

This meter includes the following features:

  • Environmental noise parameters (Leq, Ln, Lmin, Lmax)
  • Automatic timers
  • Audio recording
  • Single measurement span 20 to 140 dB

You can read more about the meter itself on the Optimus Green page.

This meter is ideal for most environmental noise measurement applications. The exception to this is when you need to assess potentially tonal noise.

Tonal Noise?

If you need to measure the tonal content of noise then you will need 1/3 octave band filters, which are not included with this meter.

If you are unsure or don't need 1/3 octave band filters at the moment then it is always possible to upgrade at a later date. Some upgrades require the meter to be returned to us, but we can handle all that for you.

For tonal noise assessments please consider one of the following options:

Environmental Noise Measurements

Most environmental noise surveys require the following parameters, or a subset of these:

  • LAeq - The A-weighted average sound level
  • LAmax - The maximum A weighted sound level (Fast or Slow)
  • LA90 - The sound level exceeded for 90% of the time (background noise)
  • LA10 - The sound level exceeded for 10% of the time

The measurements will usually be carried out over 5, 15 or 60 minute periods, repeating throughout the survey period.

Some applications need measurements of these acoustic parameters over curfew periods, so for example between 11pm at night and 7am in the morning.

The meters we recommend for use with the Outdoor Kit include all these parameters, and many more.

Timers and Periodic Measurements

Automatic, repeating timers can be configured to make measurements over preset or custom periods. These would usually be set to 5 minutes, 15 minutes or 1 hour for environmental measurements. Timers are included with this meter.

Noise Profile

As well as the periodic summary measurements the meter also stores a time history noise profile. This can provide a graph of sound level over time and is a good way to pick out noisy periods.

The meter can be set to store time history samples at a rate of 1/100s to 2s.

Once downloaded to the software (which is included) you can plot graphs of the sound level over time and recalculate certain noise parameters.

Voice Notes and Audio Recording

Before starting a measurement you can record VoiceTag audio notes, which in some environments is easier than writing things down. These are stored on the meter and can be listened to after downloading the measurements.

The meter is also capable of recording the audio during a measurement. These recordings can be threshold triggered based on the sound level, making it much easier to identify the cause of high noise levels when the monitor has been left unattended.

Environmental Noise Software

The outdoor noise kit includes the NoiseTools software - there is no extra charge for this. You can download the software to evaluate it before making a purchase.

NoiseTools Software

The NoiseTools software runs on a Windows PC. It is compatible with all recent versions of Windows, from Windows 7 onwards.

  • Downloads measurements from the Optimus Sound Level Meter
  • Produce noise reports, including custom environmental noise reports
  • Print or export reports for sharing
  • Listen to Voice Tags and audio recordings
  • Link measurements to projects, people and places
  • Free, lifetime updates
  • Licence free with no installation restrictions

More information about NoiseTools

Outdoor Kit Contents

The WPK1710 and WPK1720 outdoor kits include the following items:


The main option with this kit is whether to have Class 1 or Class 2. A Class 1 meter is more accurate than Class 2, as defined by the various sound level meter standards such as IEC 61672 and ANSI S1.4.

Most environmental standards suggest the use of a Class 1 meter. Class 1 meters are also often provided with a more sensitive microphone capsule that is better for use in low noise environments.

Noise MeasurementsSee Optimus Green Specifications
ConnectorsMicrophone input from MK:172 Outdoor Microphone
External Power Connector
External power12-18v DC
Dimensions465 x 180 x 355 mm
Weight14.1 kg / 31 lbs including:
2 x batteries, charger & outdoor microphone