Odour measurement equipment and technologies

Equipment for odour laboratories and emission testing

As a manufacturer of olfactometers, VOC emission test chambers, sampling equipment and software, we do everything we can to measure odours and VOCs in a more reliable and user-friendly way. Our complete solutions are field-tested in a variety of environments and optimally matched to each other. We are the only manufacturer, accredited testing laboratory and service provider for odour measurements in one. This is how we help you and your clients to become better. Day after day. Since 1996, worldwide. We do this through

  • quick analysis processes
  • immediate, tangible results
  • measurement procedures conforming to standards and ready for accreditation
  • optimised interfaces between human being and machine
  • mobile application possibilities
  • ergonomic designs
  • and reliable support
odour testing equipment
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Trust in the reliability and user know-how of the worldwide market leader!

Olfasense odour measurement equipment and techologies are solutions from users for users. Our expertise: More than 400 users of our technology worldwide, including research institutes, universities, odour laboratories and companies. Our claim: Maximum functionality, reliability and continuous development of odour measurement procedures and methods for

  • equipping odour laboratories
  • improved panel selection
  • expansion of the scope
  • accreditation and notification

Take advantage of the best devices and technologies – worldwide

Sampling equipment

Our sampling systems have been specially designed for the standardised sampling of odours, gases and VOCs. They also support you in the analysis of highly concentrated odour samples.

Sniffing Sticks

Our sniffing sticks support you in the selection and training of odour panellists in accordance with common standards (e.g. ISO 12219-7).

Reference material

Our reference material helps you to validate tests and calibrations and effectively supports you in ensuring your quality.

Ion mobility spectrometry instruments

High-end G.A.S. equipment is characterised by its extreme sensitivity (lower ppbv range), high analysis speed (a few seconds), and a convincing value for money.

Client feedback

Over 400 laboratories, research institutes, universities and companies work with our solutions. From small family-run businesses to major multinationals – here’s what our clients say about our odour measurement equipment and technologies.

Take advantage of our service and support

It is not just our expertise, experience and innovative strength that have made us the leading manufacturer of equipment and technologies in the field of modern olfactometry. Our customers also benefit from comprehensive service and support. We help you to ensure that your odour laboratory is able to demonstrate consistently high performance and your teams benefit from the latest know-how. We would be happy to answer your questions in a personal meeting. You can reach us by phone or e-mail from Monday to Friday between 8am to 3pm CET on +49 431 220 12 26 or support@olfasense.com.

Certified distributor network

In addition to direct sales and support, Olfasense serves its clients via a global network of certified distributors to offer the highest levels of service across the whole globe.

Olfasense Distributor Map 2020

Want to know more about us?

We’ve started small but we’ve always aimed high. Discover more about our accredited areas and our work in relevant working and standardisation groups. And find out how it all began.

FAQs - Frequently asked questions about olfactometry and odour testing

What is olfactometry?

The measurement of the concentration of odorous substances in an air sample is called olfactometry. In this sensory measurement method, the human nose is used as a “measurement device”. Test persons in olfactometry are also referred to as odour panellists. Several odour panellists for the analysis of an olfactometric evaluation form an odour panel.

How does olfactometry work?

In olfactometry, an odour sample, usually contained in a sample bag, is connected to an olfactometer. This device for measuring odours, first dilutes this odour sample with neutral-smelling compressed air so that the odour panellists do not perceive any odour. In each test round, the olfactometer dilutes the odour sample less until the odour panellists perceive the odour. This point of perception is known as the odour threshold. As a result, you now know the dilution ratio between neutral air and sample air. And you can determine the odour concentration in units of OU / m³ air. The olfactometry measurement method is standardized in the European standard EN 13725.

Where is olfactometry used?

Dynamic olfactometry standardized in accordance with the European standard EN 13725 is mainly used for odour measurements in the environmental sector to determine odours from an odour source, e.g. an industrial plant. For this purpose, samples are taken in sample bags e.g. from exhaust chimneys or from surface sources with special sampling devices. The samples are evaluated with a dilution device, the so-called olfactometer. Specially trained people, so-called odour panellists, are used as sensors. The results of an olfactometry can be used, for example, to determine which filter technology (e.g. biofilter, thermal post-combustion, activated carbon, etc.) should be used in order to reduce odour emissions in accordance with the regulatory requirements,.

How many odour panellists do I need to perform olfactometry?

The EN 13725 specifies that the minimum size of the odour panel must be at least 4 for each odour measurement. A larger number of odour panellists is recommended to improve repeatability and accuracy. About 80% of all professional EN 13725 laboratories worldwide work with 4-place olfactometers. Only in some countries like the Netherlands 6 odour panellists are required. Please note that you can also work with 8 or 6 odour panellists on a 4-place olfactometer by adapting the olfactometer software settings accordingly.

Can I also use so-called field olfactometers?

Olfactometers used outdoors, so-called field olfactometers, do not meet the technical requirements of the EN 13725, as odour panellists must be isolated from the outside air as described in Chapter 7.2.1. Many other factors make measurements with field olfactometers difficult and mean that the results of field olfactometers cannot be validated. For example, low odour concentrations are very difficult to measure. This means, there has to be a certain odour in the outside air in order to be able to measure at all with a field olfactometer. In addition, the EN 13725 describes the measurement of odour emissions “at the source”, which requires sampling directly from odour sources such as chimneys or biofilters. As a consequence, results from using field olfactometers cannot, strictly speaking, be presented in OU / m³. This makes it difficult to make reliable statements about possible degrees of odour reduction. There are also no well-founded studies on the precision and uncertainty of the measurement method using field olfactometers.

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