Gas warning devices and gas detectors protect against the invisible danger!

Our focus is on your safety

Nothing is more important to us than your security. As a medium-sized company, we are particularly close to our customers. After all, our credo is: gas detection technology for your safety.

With this in mind, our entire team stands for first-class advice, first-class products and first-class service.

Since its foundation by Friedrich Deckel in 1898, Compur Monitors has successfully established itself on the international market as a developer and manufacturer of gas measuring devices, gas warning devices and gas detectors.

Why COMPUR

High-quality and highly sensitive sensors from our own production
Consideration of complex customer requirements possible
Top service and short response times
Quality “Made in Germany” for over 50 years

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The right gas detector for every requirement

We are manufacturer of high – end gas detectors for field installation with safety level SIL 2 for any application. Highly sensitive sensors ensure that any exceeding of the alarm setpoint value will be registered and signalled immediately. The Statox 560, for example, has nearly no cross-sensitivities to other gases. Depending on which gas shall be detected and w hazardous location has to be monitored, a very specific gas detector is sneeded. Portable multiple gas detectors complete the product range. Our specialists will be happy to assist you with your selection.

Stationary gas detectors

The Statox product family consists of fixed, on-site measuring heads that transmit the measured gas concentration to Compur Control Modules or to a process control system. Compur sensors are characterised by their very high selectivity.

Portable gas detectors

Leak detection in the ppb range and gas generators for testing gas detectors in a matter of seconds: portable devices from Compur Monitors are valuable on-site helpers.

Confined space entry

Before entering areas with a potential gas hazard, check if your fixed gas detector tells you it is safe to enter.

Discontinuous methods

Dosimeter badges for phosgene are an indispensable tool for the doctor in the event of a Phosgene exposure.

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COMPUR News

New Statox 506 product family

The new Statox 506 product family combines all the advantages of a modern gas detection…

New market developments

Hydrogen is now on everyone’s lips as a green energy carrier. It is often forgotten…

Expansion of the Statox 560 product family

This gas warning device tests itself daily with the gas to be measured. More functional…

Compur gas detectors with self test

Functional safety ratings can give you a very good idea about the probability of a gas detector failure while gas is present. But this statistics only tells you about the probability of a failure. It cannot assure this failure will not happen right in the next second.

Functionality is a useful tool, but it does not provide 100 % safety
The only way to ensure that your gas detector operates properly is a test with the target gas. This is what the Statox 560 does on a 24 h interval. And this without storing toxic gas inside! The test gas will be generated only when it is needed by the patented electrochemical gas generator. The amount of gas generated is enough to trigger the sensor, but so low that in an inch distance the concentration is below the detecable limit, i. e. no danger to health and environment.

Our gas warning devices and gas detectors are suitable for a wide range of applications

Typical areas of application include the chemical, pharmaceutical and food industries, refineries, sewage and water treatment plants, greenhouses, airports, multi-storey car parks, petrol stations, shopping centers, hospitals, machine rooms and technical function rooms in office buildings. Our gas detectors provide very accurate measurement in the LEL, ppb and ppm range for toxic, flammable and explosive gases, refrigerants and volatile organic compounds (VOCs).

When it comes to sensor technology, we can offer catalytic sensors for combustible gases, electrochemical sensors for toxic gases, infrared sensors with high measurement accuracy and photoionisation detectors, such as PID sensors for VOCs.

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Guides

The COMPUR guides provide an overview of numerous gases and other non-gaseous substances.

Downloads

In our download area you will find the latest brochures as well as the complete set of operating ans installation instructions.

Jobs

Are you looking for a new challenge? Then you’ve come to the right place! Discover current vacancies now.

History

Find out how it all began many years ago and how COMPUR MONITORS developed into what it is today.

Dr. Josef von Stackelberg
Managing Director COMPUR MONITORS GmbH & Co. KG

+49 89 62038268 · compur@compur.de

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Do you have any questions about our products or would you like a non-binding consultation? We look forward to hearing from you.

Frequently asked questions

Are the gas detectors explosion-proof?

Yes, all of our gas detectors are approved for operation in explosive atmospheres. They are designed in a flameproof enclosure or are intrinsically safe. This means that they cannot serve as a source of ignition. This contributes to greater overall safety, as you can rely on your gas detector without restriction even in the event of an imminent or actual gas hazard.

Gas detectors from Compur Monitors are always explosion-proof and have ATEX certificates. Different concepts are used depending on the application and the gas to be measured. Ultimately, the point is that gas detectors must be installed in potentially explosive atmospheres. It is therefore very important that they cannot become a source of ignition. An ignition source can be an open flame, such as during welding, but also a spark generated by electrical discharge or static charge. A hot surface, for example a component that heats up, can also be a source of ignition.

One strategy for preventing ignition is flameproof enclosure – Ex ‘d’. With this method, the device is installed in a housing that is so stable that a deflagration inside does not represent a source of ignition on the outside. This is a challenge for the designer: After all, the gas has to reach the sensor, otherwise it cannot be measured. The sensitive element, which is often hot – such as heat tint sensors – is usually separated from the environment by a flame arrester. This usually consists of sintered metal. This is porous so that measuring gas can diffuse through it, but has such a large surface area that the energy of any explosion inside is dissipated, i.e. no ignition can take place.

Another strategy is, for example, to design the electronics to be intrinsically safe, Ex ‘i’. It is designed to be so energy-saving that no component can become hot. All capacitances and inductances are kept so low that no sparks can occur.

It goes without saying that suitability for use in potentially explosive atmospheres must be tested and certified by an independent institution. Even the manufacturing processes are regularly audited to ensure that all requirements of the ATEX standard are met.

Do you measure the AGW of toxic gases, e.g. HCN phosgene or VOC?

Yes, toxic gases can also be measured with a gas detector from our range. Potentially toxic gases are measured in both the ppm and ppb range.

The history of Compur Monitors began in the 1970s, when the chemical industry also began to demand the monitoring of the atmosphere for toxic gases. Gas measurement technology in general has its roots in mining. There, protection against firedamp is of paramount importance. Hazardous atmospheres are atmospheres that are life-threatening due to their content of toxic carbon monoxide or explosive methane.

In the chemical industry, the demands on sensor technology are even higher, as numerous substances have extremely low limit values, the so-called AGW (occupational exposure limit value).

Phosgene – COCl2, chlorine – Cl2, hydrocyanic acid – HCN in particular are very toxic and therefore have very low limit values. The European Union is planning to reduce the limit value for HCN to 0.9 ppm, for example. The limit value for phosgene is already 0.1 ppm.

Electrochemical sensors are preferred for measuring such toxic gases. To put it very simply, you could say that they work like a gas-powered battery: gas in – current out. Current is an electrical quantity and therefore easy to measure. When developing electrochemical sensors, care is taken to ensure that the gas to be measured is either reduced or oxidised during an electrochemical reaction, i.e. each gas molecule supplies or consumes one or more electrons. These are passed through a highly sensitive amplifier, which detects them as a current. To put it simply, a gas detector is a ‘molecule counter’.

Electrochemical sensors are very specific to certain gases. They do not require any auxiliary energy. Therefore, very small devices can be built ‘around’ them. This is a huge advantage, especially when building personal protective equipment.

Do you have sensors based on the principle of infrared absorption?

Yes, the gas detectors in the Statox 501 IR, Infratox, MC IR and LC IR series are equipped with this sensor technology. As a result, these gas detectors are not only suitable for measuring hydrocarbons and carbon dioxide in the ambient air of your company, but are also insensitive to catalyser poisons and independent of the oxygen content.

Do the gas detectors have electrochemical sensors?

Yes, equipped with electrochemical sensors, our gas detectors are particularly suitable for measuring especially toxic inorganic gases. The more toxic a gas is, the lower its limit value. This is why a very high measuring accuracy in the ppm and ppb range and a very low detection limit are required, especially for very toxic gases. This ensures that the measurement accuracy is particularly high, especially for AGW.