Pure Infinity’s VOC measuring device
Measuring VOC, Volatile Organic Compounds, or solvent in the air is a challenging task for companies. The instruments are expensive and the calibration and interpretation of the results are complex and need to be executed by experienced and skilled professionals. At Pure Infinity we’ve got the solution: meet our VOC measuring device, the Pure FID.
Why measure VOC’s or solvents
Increasing demands for indoor quality in production facilities and for reducing the VOC and solvent emissions causes the need for a deep knowledge of the VOC’s that are inside and are emitted by the factory. Knowing what is emitted gives the knowledge about which specific solution could solve the VOC problem. Weather it is simply sufficient to change the production process or when it is necessary to install a VOC treatment system. First step in this process is the measurement of emissions in the factory. Because production is always fluctuating, VOC concentrations also variate. To have an overall view on the VOC concentrations and loadings it is therefore always recommended to measure for a longer time: a couple of days up to a several weeks gives a full insight of the VOC problem.
Pure Infinity’s VOC measuring device
The Pure Infinity FID is a plug&play integrated system. It can sample four locations at the same time. If necessary, the system has an integrated automated cleaning system for the sample lines by blowing air in reverse through the sample lines. Condensation water will be removed from the sample lines to ensure maximum accuracy and protection for the analyser. The FID gives a rapid, accurate and continuous reading of total VOC concentration for levels as low as ppb.
At Pure Infinity we have FID’s for rent, build in a complete case with PLC remote connection by GSM to our servers for data collection. The setup of the FID can be done by a Pure Infinity professional or a staff member of your organization in approximately 30 minutes. Once connected to the electricity the system will connect with our servers and we can control, monitor and collect the data.
Once setup the system can run for longer periods up to several months. The FID records standard data per 6 seconds so every minute there are 10 measurements of the concentration of the solvents or VOC’s in the air. The FID can measure on 1 mg/Nm3 accurate. In combination with taking a separate sample which is analysed in the lab, we are able to distinct the different type of VOC’s to give the precise total VOC concentration. Results can be presented as raw data in .csv or Excel or shown in a full report by us with interpreting of the data.
Results after measuring
- Knowledge of current VOC concentration in the factory;
- Knowledge of VOC concentrations in the air emissions to prove to the authorities that the levels are within legal limits;
- Knowledge of VOC concentrations over time to use as a design characteristic for additional VOC treatment;
- Knowledge of current VOC treatment performance.
Flame Ionisation Detector
A Flame Ionization Detector (FID) consists of a hydrogen (H2)/air flame and a collector plate. The effluent from the GC column passes through the flame, which breaks down organic molecules and produces ions. The ions are collected on a biased electrode and produces an electrical signal. The FID is extremely sensitive with a large dynamic range. Flame ionization detectors are used for detecting hydrocarbons, also called Volatile Organic Compounds (VOC).
The sample to be analyzed is mixed with a special burner fuel, hydrogen (H2). Ions and electrons that were formed in the flame enter the electron gap, decrease the gap resistance and thus permit a current to flow into the external circuit. The current is proportional to the rate of ion formation which depends on the hydrocarbon concentration in the gases and is detected by a suitable electrometer and displayed on an analogue output.
The Pure FID can measure 4 sample points simultaniously in a sequence that can be adjusted for the specific use of the Pure FID. The settings that can be used are xx min sampling of sample point 1 then switching over to sample point 2. xx seconds waiting to refresh the sample line for the air from the new samplepoint than xx min measuring sample point 2 etc. If the air is wet or dusty the Pure FID can automatically purge the sample lines in reverse with a build in airpump.
Data collection by REMUS
The Pure Infinity REMUS system collects all the data that is generated by the FID automatically. Via a mobile netwerk it’s send to REMUS and REMUS turns the data into an easy visual presentation. It also exports data to csv and excell files so it can be used by process engineers. REMUS is build for these specific tasks and runs on the dataservers of Pure Infinity.
Why choose the Pure FID
- The FID is the approved measuring method for VOC/solvents throughout the EU;
- 4 spots measuring simultaniously ranging from 0-10000 ppm;
- Remote data collection in REMUS exportable to excel and direct graphs;
- GSM/Mobile data transfer;
- Certified calibration possible;
- Equiped with all necessary tools and tubings; Plug & Play;
Gasses need to be organized by client
Specification for H2 (hydrogen) for the FID
Due to the restrictions on transporting compressed gasses and explosive gasses in particular, the burner fuel (hydrogen) for the FID will need to be organised on location at a local gas supplier: companies like Praxair, Linde Gas, Air Liquide etc. are possible suppliers. H2 gas is available in cylindrical bottles under pressure in different sizes. Specifications:
- Fuel gas: Hydrogen (H2) CAS: 1333-74-0
- Purity: A purity of N5,0 (99,999% pure H2) is needed
- Usage: Usage is ~ 1,2 liter per hour
- Connection: DIN 477 type 1. This is a connection W21,8 x 1/14” L (left turning)
- Pressure to FID: To be confirmed by Pure Infinity. Regulator also connected/included to the Pure FID.