Gas Detection 9 Fast and High-Resolution Gas Sensors for the Energy Industry


Changes in the energy industry have generated a great need for affordable, high-resolution sensors for the measurement of the energy content of natural gas and other fuel gases. At the same time, the demand for more effi cient appliances for routine monitoring and leakage detection has also increased.


In order to quickly and accurately measure this, a new infrared spectrometric sensor was developed as part of the joint “SIRKO” project, which has signifi cantly improved properties when compared to previous methods. Involved in this development was Dresden-based InfraTec (Germany), who presented this detector XFP-3137 at SENSOR+TEST 2015 for the fi rst time.


The core of the innovation is a tunable micromachined Fabry-Pérot fi lter (µFPF). By using a higher order of interference, the spectral resolution could be improved from 60 nm to about 25 nm in the wavelength range of (3.1 … 3.7) µm. The dynamics of the fi lter was signifi cantly improved by optimising the electro-mechanical design and enables scan frequencies of up to 10 Hz. As an additional option the simultaneous measurement of carbon dioxide in the wavelength range to 4.3 µm will be possible in the future by using the dual-band sensor.


Infrared spectroscopy is a physical sensing principle to determine gas concentrations accurately, selective and long-term stability. In particular, the accurate and rapid analysis of gas mixtures, such as hydrocarbon gas mixtures or the composition of natural gas, can be carried out using the detectors developed in the project with integrated µFPF.


This technology can be used to analyse gas compositions such as hydrocarbon mixtures or the composition of natural gas. These detectors can not only be used in large power plants, where even small improvements in the effi ciency can bring enormous benefi ts, but also in cogeneration, natural gas fuel cells and small fi ring systems.


The name SIRKO stands for “Fast infrared spectrometer for the analysis of hydrocarbons”. The joint project was part of an initiative promoted by the innitiative “KMU-innovativ: Optische Technologien” by BMBF. Started in early March, 2012, the SIRKO project was successfully completed in February 2015.


New Range of Gas Sensors Make Car Park Monitoring Easy


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DD Scientifi c (UK), a leading manufacturer of electrochemical sensors has recently launched a low cost, high performance range of sensors designed to meet the needs of cark park monitoring. There is increasing interest in the cost savings that can be made by ensuring that ventilation systems are only operational when required – to do this, it is essential to measure gases such as carbon monoxide and nitrogen dioxide which occur in underground car parks.


These pollutants only appear when vehicles are moving inside the car park, if they are not present then the ventilation can safely be shut off. The reduction in energy usage by operating the systems only when required can be signifi cant over the operational life of the ventilation system.


To meet the demand for accurate gas sensing in such systems, DD Scientifi c has developed two sensors for the key target gases; carbon monoxide and nitrogen dioxide. The sensors provide robust and reliable detection over fi ve years and have been optimised so as to deliver this performance at an extremely affordable cost. The sensors are already in use in car park applications and have been tested to be compliant with relevant industrial standards such as EN50545-1.


Their simplifi ed design allows for easy integration with electronic monitoring equipment and their excellent long term drift characteristics reduce the frequency of calibration to the point where they can be considered ‘fi t and forget’. For both gas types, the sensor can be supplied with an extra internal reference electrode that allows higher gas concentrations to be measured as well as providing additional temperature stability.


To learn more about these and other exciting releases from DD Scientifi c’s development team, please contact a member of the sales team.


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New System for Early Warning of Hydrocarbon Leaks though Existing Monitoring Wells


CLH Group, installs an innovative technology developed by Smart Sensor Technology (Spain) for early warning of hydrocarbon leaks though existing monitoring wells.


CLH Group has been a pioneer in implementing a new hydrocarbon leak detection system in water using a net of existing monitoring wells. The company has installed its technology in 12 facilities in 2015.


According to CLH Environment and Security Head, Fernando Garcia, “this technology entails a perfect complement to all our efforts to be at the forefront of environmental best practices”.


The system consists in a grid of wireless sensors installed in existing monitoring wells. These sensors fl oat in the air-water interface and they broadcast, once per day or the desired period, the signal to be visualised from any computer or mobile device.


The sensors work using a Physical-Chemical reaction to avoid false alerts. The sensor also allows to know the type of contaminant as well as it retains a physical evidence of the contamination.


The devices are ATEX certifi ed and communicate between them in 868 MHz frequency. They are IP68 and they last 10 years with the same battery.


The system is completely wireless and if needed it can use repeaters to cover big distances till it connects to the GRPS control unit. The control unit is installed inside the client’s offi ce and connects to the cloud for easy access.


The devices are extremely easy to install. Just drop the sensor inside the piezometer (from 2” and over) and set the transmitter in the top of the monitoring well. The installation takes no more than 10 minutes for each piezometer and no civil work is necessary.


The operating range of the transmitters is about 100m. But if they are below the metallic chamber of the monitoring well the signal strength is reduced to only a few meters. In this case a simple repeater is installed near the emitter in order to extended the signal up to 100m. You can use more than one repeater to reach several hundreds meters.


The control unit is installed in the client’s offi ce where it collects raw data from the sensors, fi nally all this information will be sent to a server in order to be available from any computer and mobile device through a cloud based solution.


According to Alvaro de Fresno, Technical Manager of Grupo Hera Tratesa S.A.U., the installation of 12 sensors across a facility can take 2h approximately in standard conditions.


The technology is very affordable and allows companies to have a very effi cient continuous online monitoring system at a fraction of the of other alternative solutions says Santiago Ramas, CEO and Co-Founder of Smart Sensor Technology.


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