Combined noise and dust monitoring in a single station. Measure your boundary emissions in real time and automate your compliance checks.


DM30N Sitesens

The Sitesens is a combined boundary monitoring station for measuring air quality and noise levels. Monitor and control all your emissions with a single device.

Built on our Class 1 sound level monitor and including our MCERTS approved dust sensor, the Sitesens boundary monitor can help you to automatically check compliance with any environmental limits.

Automate your measurement tasks and collect particulates and sound level measurements as soon as you power up. All readings are automatically uploaded to the Sonitus Cloud platform so you can check your measurements against any limit values and alert your team immediately.


Control your site with one monitoring station

Simplify your monitoring tasks with a combined station, saving time and effort.

Measure all your emissions

Class 1 sound level monitor and an industry leading particle counter. Collect all the data you need for environmental compliance.

Gear by Barudak Lier from the Noun Project
Automated operation

No filters and no hassle; just power on and measure. Save time on site with simple equipment.

Email and SMS alerts

Our online system can check all your emissions against site limits. Get live alerts to all your team for your site checks.

Built for tough environments

With a heated inlet to remove moisture from the air and a weatherproof microphone, the Sitesens is ready for the toughest conditions.

world by Fernanddo Santtander from the Noun Project
Automatic reporting

Get automated reports for air quality and noise. Receive alerts if your equipment is offline.

support by Barudak Lier from the Noun Project
Simple field operation

All equipment is delivered ready to deploy on site, saving you time. And reduced site visits mean you save money too.


Key features

  • Class 1 sound level monitor to IEC 61672
  • Optical particle counter with industry leading precision
  • Monitor LEQ, L05, L10, L50, L90, L95 and LMAX
  • Measure PM10, PM2.5 and PM1 simultaneously
  • Audio capture option for sound source identification
  • Frequency analysis option - 1/1 or 1/3 octaves
  • Heated inlet to remove moisture, with selectable power control
  • No filters and no maintenance required
  • Ready to deploy on site with our easy install bracket
  • Rugged design, ready for work on any site
  • Simple service procedure, just swap out the sensor for a calibrated device
  • Connected to our Sonitus Cloud platform for automated reports
  • Each device individually verified in our state of the art laboratory
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Specifications (dust)

Measurement parameters

PM10, PM2.5, PM1, temperature and % RH

Measurement method

Optical particle counter

Measurement range

up to 2000 µg/m3

Particulate range

0.35 to 40 µm

Measurement period

1, 5, 10, 15 and 30 minute logging intervals
Hourly and 24 hourly averages calculated

Data storage

3+ years on board (at 5 minute intervals)


400 x 300 x 150mm with 180mm inlet


11kg with stainless steel surround

Operating temperature

-10 to 50 °C

Operating humidity

0% to 95% RH


802.11b/g Wi-Fi and 3G/4G cellular

Power input

110V-240V AC or 12V DC

Power Consumption

24W with heater at full power
(heater power is user controlled)

Maximum Current

2A at 12V

Specifications (noise)


IEC 61672 Class 1

Dynamic range

16 to 121dB(A)

Frequency range

20Hz to 20kHz

Sampling frequency

A and C weighting

Measurement parameters

LEQ, L05, L10, L50, L90, L95 and LMAX

Microphone sensitivity


Microphone connection


Microphone power supply

Constant current ICP

Operating temperature

-10°C to 50°C

Operating humidity

0% to 95% RH

Maintenance and Service

We understand that downtime in the field can be a major problem on your projects. That's why we made a modular device that can be easily serviced and maintained.

There are no filters or consumable parts. And when it comes time to calibrate your device you can just remove the sensor module and send it to the lab.

We will can ship you a fully calibrated sensor module in advance so that you can swap out your device in just a few minutes, keeping downtime to a minimum.

Documents and downloads

Product flyer

All the tech specs and product features. Download the spec sheet here.


User manual

Check out the manual for detailed information and instructions.



MCERTS Certification for PM10 and PM2.5. Contact us for a sample calibration cert.



We have tried to answer the most common questions we are asked here.

Contact Support

If you have a question that we have not covered then just get in touch and we'll be happy to help.

How do I set up and start a measurement?

Mount the Sitesens on a wall, pole or tripod using the bracket supplied with the equipment. Power up the device and measurement will begin automatically. The monitor will continue logging particulate levels until power is removed.

Changing the measurement settings is simple too. The user interface to the Sitesens is through a web browser over Wi-Fi link, so you can connect using a laptop or smart phone. We know it can be difficult to make changes to configurations when equipment is already installed, we've been there. So the Sitesens is different, there are no small buttons or screens and no complicated menus to look through when you are on site. Simply connect to the Wi-Fi network and log in using your favourite browser. You can download readings and change the measurement set up. Then just reboot the system and your changes will be applied.

What happens when the power goes off?

The Sitesens will start measuring again as soon as power comes back on. To help reduce downtime, we will know if your measurement site goes down. Our performance monitoring software checks to ensure that your measurement site is reporting on schedule, so if power goes off you can receive an email alert to let you know.

How do the communications and data upload work?

Fully automated of course. The Sitesens comes with a GSM modem installed and we provide the SIM card to work on the local 3G/4G network. Readings are automatically uploaded to the Sonitus Cloud every 15 minutes so that you can access everything online.

Our cloud software lets you manage your measurement sites and analyse your data. There is no need for a phone contract or trying to configure network settings. The data costs are part of our pricing model and are covered by an annual payment.

Will it work in my area?

We have an international data solution that lets our equipment operate out of the box in almost 200 countries. This is still dependent on good network coverage in the area. Data costs and speeds can vary between networks and countries, so get in touch with us and we can find the best solution for your project.

How do I access the readings?

When you receive one of our monitoring stations we provide a secure login to our Sonitus Cloud platform which gives access to all your readings. Using this platform you can access raw data, plot graphs, export spreadsheets and set up automated analysis functions for processing your data.

You can also connect to the Sitesens over the local Wi-Fi interface. All your readings are stored on the device and can be downloaded for analysis or back up.

Does the Sitesens measure anything else?

The Sitesens measures temperature and humidity along with the default particulate levels and sound levels.

You can also upgrade your Sitesens device to be include a wind sensor too. This is a factory upgrade that adds an ultrasonic wind sensor so that you can measure wind speed and direction on site.

How often is laboratory calibration needed?

We recommend that the Sitesens is serviced every 12 to 24 months depending on how dusty the environment is. Ambient monitoring applications with lower particulate level can tolerate longer periods between service, up to 24 months.

To simplify calibration you only need to send the sensor head to the laboratory for service. This can be removed from the cabinet without having to unmount the entire installation.

To reduce downtime we can ship you a calibrated sensor in advance. So you just swap out the sensor unit and send the old one back to us. That will get you back up and measuring in just a few minutes.

We focus on what's important