34 Air Monitoring Contributing to the emissions monitoring of tomorrow


KNF offer powerful measurement technology solutions, including the N 630, N 922, and N 96 oil-free gas pump series, which meet the highest durability requirements and allow for customization. The versatile N 630 gas pump series for Ex and non-Ex areas offers robustness, durability and long service life. All Ex and non-Ex versions are available as a single-headed model or with twin heads connected in parallel or in series. Users who wish to double down on leak-tightness can do so by choosing a model featuring an additional double diaphragm. This is typically needed for noble gas or hazardous gas applications. An optional water-cooling system can also be installed to enhance non-Ex versions to handle environment and media temperatures of up to +60 °C.


The non-Ex versions are equipped with either an EPDM or a PTFE-coated diaphragm, the Ex-version with a PTFE-coated diaphragm. Pumps from the N 630 series can achieve fl ow rates of up to 68 l/min, an ultimate vacuum of up to 25 mbar abs as well as pressure of up to 12 bar g. The protection class of the pump section is IP20, and the motor offers IP55 protection. It can be used at 50 or 60 Hz and is designed to be operated with a frequency converter. This allows the pump’s rotational speed to be set to any operating point.


The chemically resistant and oil-free N 922 vacuum pump transfers media reliably and with low maintenance requirements. Depending on the area of application, the diaphragm and the valves of the N 922 only need to be replaced about once a year. Few wearing parts, long periods between required maintenance work and low inspection costs all add up to advantageously low operating costs.


The gas transfer pump is now also available in two new non-Ex versions and a new Ex version, all with stainless steel pump heads, making it suitable for even more applications. The new models are highly leak-tight in keeping with KNF’s standards, and they feature substantially higher values in all the key areas compared to previous PTFE pump head versions, with a fl ow rate of up to 25 l/min, up to 110 mbar abs depth of vacuum and up to 6 bar g of pressure. This makes them particularly convenient as sample gas pumps for stationary emissions measurements.


To allow for geodetic discharge of condensates, the compressor housing in the N 922 can be moved in increments of 90 degrees separately from the motor.


In non-Ex versions, users can choose from three separate AC motors. With the IP20 protection class, the single-phase AC motor with a terminal box covers a broad voltage range of 100–120 V at 50/60 Hz, as well as 200–240 V at 50/60 Hz. An additional IP54 protection class single-phase AC motor with a terminal box covers a voltage range of 100–120 V at 50/60 Hz, 230 V at 50 Hz, as well as 220 V at 60 Hz. Another IP54 protection class motor is the three-phase AC motor for 230/400 V and 50/60 Hz that can be operated with a frequency converter. The Ex de motor with protection class IP66 is ATEX-compliant and certifi ed to IECEx (incl. CCOE, NEPSI, KOSHA).


The N 96 pump series for complex operating profi les in gas sampling analysis is small, light and high-performance – key qualities that manufacturers of portable measurement, monitoring and analytical systems require from pump technology. What’s more, the N 96 gas sampling pump also accommodates complex operating profi les. This dynamic profi le is made possible by an effi cient, brushless DC motor featuring a PWM control loop setup. The N 96 emits relatively little heat itself while being suited for use at ambient temperatures of up to 50 degrees Celsius. The pump can start up without discharge in the range of 2.5 bar relative pressure / 100 mbar abs vacuum. The fl ow rate is as high as 8.5 l/min. If necessary, the maximum positive pressure can be increased to up to 4 bar g.


When used for gas analysis, the pump transfers reliable and precise liquid or gaseous samples for evaluation. The EPDM- or PTFE-coated diaphragm ensures safe use with aggressive and/or corrosive media. Its chemically resistant design and very high tolerance of vapor and condensate means the N 96 can be used with a broad spectrum of media at temperatures of up to 70 degrees Celsius. These pumps can transfer, evacuate and compress media oil-free and without contamination. The N 96 pump series features compact versions with AC/DC converter and PPS, stainless steel or aluminum pump heads. This allows for a broader range of applications, now encompassing the handling of valuable or hazardous gases such as tritium. Demanding media which may require optionally greater gas tightness – such as hydrogen, nitrogen and helium – can also be handled safely.


More informtion online: ilmt.co/PL/KBpA Dependable CO2 indoor air quality devices


optimise demand-controlled ventilation Indoor carbon dioxide (CO2


For More Info, email: email:


) may not necessarily pose an immediate threat to human life, it can certainly affect well-being, alertness and overall


performance. Today it is both a legal and economic necessity to ensure that the indoor air quality is of a high standard. We all exhale CO2 buildings with poor ventilation can build up levels of the gas rapidly. LogiDataTech provide a series of solutions to monitor and control (CO2


, so busy ) so that


ventilation can be ‘demand-controlled’ to ensure a healthy indoor environment is achieved effi ciently and economically. Demand-control ventilation ensures that indoor spaces are ventilated to the right level, rooms are at a comfortable temperature, the air is clean and building HVAC systems are running as economically as possible.


LogiDataTech’s measurement devices cater for all indoor CO2 monitoring criteria. The infrared sensors provide reliable and precise CO2 levels


in ambient indoor air to enable the ventilation system to perform at an optimal level. These devices constantly self-monitor and then signal any hard or software malfunctions to the operator. The entire measuring range is linear and LogiDataTech offer a solution for every temperature and


measuring range. The MF 420 IR Mobile ‘Air Quality Signal’ uses a using a specifi c two-beam infrared NDIR photometer to determine absolute CO2 concentration in the ambient air (atmospheric partial pressure). The Air Quality Signal can be mounted on a wall or placed on a shelf; it includes an AC power adapter.


The MF420-IR AL provides the same features as the MF420 IR Mobile, but operators can also use the device’s two independent relay outputs can be activated to automatically activate automatic window openers, air conditioning or fans. The MF420-IR-LC features an analogue signal output with 4 - 20 mA or 0. - 10 V for transmission according to the operator’s specifi cations in a downstream device. LogiDataTech also offer the MF420-CO2 for cold storage applications operating at temperatures down to -25 ° C. TheMF420-IR-CO2-AL is a more robust version of the Air Quality Signal and features a traffi c light indication of CO2


levels.


More information online: ilmt.co/PL/M2xm For More Info, email:


email:


For More Info, email: email:


58748pr@reply-direct.com


For More Info, email: email:


57254pr@reply-direct.com


emissions from WWTPs Emissions of nitrous oxides (N2


New drone-based monitoring technique quantifi es N2


O) from the


O. And yet, monitoring these emissions is cumbersome and expensive, and comes with a lot of uncertainty.


nitrifi cation process, is one of the main climate concerns for wastewater treatment plants given the greenhouse gas warming potential of N2


Explicit ApS is changing all that with a new innovative method for measuring and quantifying GHG emissions, including N2


O and CO2 , from the


aeration tanks using ‘sniffer drones’. The method is called DFM – Drone Flux Measurement method.


Focusing on quantifying the total GHG contributions from indi vidual sites, the DFM method uses a drone integrated with high performance gas and wind sensors, in combination with an adaptive fl ight pattern, to erect vertical fl ux walls and mapping thousands of data points downwind from the target source. Because both gas and wind data are closely correlated in time and space, Explicit can accurately calculate a net emis sions rate (in kg/h) across each wall and provide a consistent representation of the fl ux density of GHGs emitting from the source.


COO/CMO Bettina Knudsen explains: “The method is very easy to deploy. The fl ight itself is automated based on pre-programmed waypoints, and the wall design can be adapted to fi t the specifi c site conditions. Each fl ux wall only takes 15-25 minutes to erect with results averaged over minimum 3 walls. Because we are able to track both gas concentrations and wind simultaneously in great detail, we get a high level of precision in the quantifi cation.”


Capable of measuring N2 O concentrations down


to ppb levels, the DFM method can measure even small releases and help establish baselines and track reductions.


DFM method is currently being deployed at various WWTPs in Denmark, and Explicit is looking to expand its operations with local partners in the UK, Benelux and beyond. Not limited to N2O and CO2


, or to WWTPs, the company is also targeting methane sources such as biogas plants, gas storage facilities, composting sites, landfi lls, and oil/gas production.


For More Info, email: email:


IET NOVEMBER / DECEMBER 2022


For More Info, email: email:


58772pr@reply-direct.com


O and CO2


Page 1  |  Page 2  |  Page 3  |  Page 4  |  Page 5  |  Page 6  |  Page 7  |  Page 8  |  Page 9  |  Page 10  |  Page 11  |  Page 12  |  Page 13  |  Page 14  |  Page 15  |  Page 16  |  Page 17  |  Page 18  |  Page 19  |  Page 20  |  Page 21  |  Page 22  |  Page 23  |  Page 24  |  Page 25  |  Page 26  |  Page 27  |  Page 28  |  Page 29  |  Page 30  |  Page 31  |  Page 32  |  Page 33  |  Page 34  |  Page 35  |  Page 36  |  Page 37  |  Page 38  |  Page 39  |  Page 40  |  Page 41  |  Page 42  |  Page 43  |  Page 44  |  Page 45  |  Page 46  |  Page 47  |  Page 48