IAS GmbH
HovaCAL - Digital Calibration Gas Generator
FromIAS GmbH
The HovaCAL Digital Calibration Gas Generator is a versatile instrument designed to generate test gases where they are crucial for verifying gas analyzers, especially when required test gases are unavailable in their proper form. It functions not only as a gas generator but also as a gas dilutor and mixer, allowing the precise adjustment of cylinder gases like SO2, CO, CO2, NOx, O2, etc., to desired concentrations. An added feature is its capability to humidify the gas mixture within a broad humidity range, creating test gases that closely mimic the complex composition of measurement gases, yet remain controllable and defined. Its elevated temperature output specifically mitigates adsorption and corrosion, significantly enhancing the response time of the generated gases. Variants such as the HovaCAL digital 211-MF and models integrated with evaporators like IAS HovaCAL digital 311, offer additional application flexibility.Most popular related searches
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HovaCAL® stands for Hot-Vapor-Calibration and is used to produce precise gas-vapor mixtures for checking gas analysers and gas metering systems. Using the HovaPOR special evaporator technology, HovaCAL® can evaporate and mix with carrier gas not only water, acids and alkalines, such as HCl, NH3, HF and HgCl2 but also organic solutions, continuously and without pulsations.
HovaCAL® works according to the principle of continuous dosing and dynamic evaporation of liquid and mixing in of carrier gas. The concentration of the gas-vapor mixture is determined through the precise dosing of liquid and gas, as well as complete evaporation in the HovaPOR evaporator.
HovaCAL® is available in different versions, depending on the application and purpose of use. For mobile use in emission monitoring, HovaCAL® consists, for example, of a supply unit and the evaporator. The supply unit is used to dose liquid and gas, as well as control and monitor the temperature of the evaporator. Mass flow meters and controllers are used to dose the medium. The liquid flow rate can also be controlled gravimetrically or volumetrically.
The HovaPOR evaporator is connected to the supply unit by lines for carrier gas, liquid and electricity to the supply unit and can therefore be set up or installed separately from it. The outlet of the evaporator can be connected to a heated pipe or directly to the gas analyser or sampling system. The accuracy and reproducibility of the resulting gas-vapor mixture are ensured by a high-precision gas mass flow controller and liquid dosing pump. And when it comes to operation, there's the easy-to-use viewCAL software.
HovaCAL® works according to the principle of continuous dosing and dynamic evaporation of liquid and mixing in of carrier gas. The concentration of the gas-vapor mixture is determined through the precise dosing of liquid and gas, as well as complete evaporation in the HovaPOR evaporator.
HovaCAL® is available in different versions, depending on the application and purpose of use. For mobile use in emission monitoring, HovaCAL® consists, for example, of a supply unit and the evaporator. The supply unit is used to dose liquid and gas, as well as control and monitor the temperature of the evaporator. Mass flow meters and controllers are used to dose the medium. The liquid flow rate can also be controlled gravimetrically or volumetrically.
The HovaPOR evaporator is connected to the supply unit by lines for carrier gas, liquid and electricity to the supply unit and can therefore be set up or installed separately from it. The outlet of the evaporator can be connected to a heated pipe or directly to the gas analyser or sampling system. The accuracy and reproducibility of the resulting gas-vapor mixture are ensured by a high-precision gas mass flow controller and liquid dosing pump. And when it comes to operation, there's the easy-to-use viewCAL software.
HovaCAL® is available in different variants and versions:
- as a mobile calibration gas generator for checking analysis systems on site or as a stationary unit for laboratory and test bench use
- HovaCAL® basic – our basic version with one gas channel
- HovaCAL® digital – can regulate up to five different gas flows, as well as mix them with vapors, and can be controlled remotely using the ViewCAL software
- HovaCAL® digital MF – additionally features internal liquid measurement and control HovaCAL® digital SP – equipped with a micro dosing device, also suitable for organic solvents
- HovaCAL® VOC – capable of generating extremely low concentrations of pure substances, e.g. down to the ppt range
The HovaCAL® is used to generate test gases anywhere that gas analysers need to be checked and the required test gases are not available in the right form:
- In the emission monitoring systems of waste incineration plants, power plants and cement plants. Due to the components being monitored – HCl, HF, NH3 and HgCl2, the analysis systems used are ones which can take hot measurements and which are adjusted with hot, humid test gases of these components.
- Hot gas FTIR analysers are used mainly for automotive exhaust analysis. They simultaneously measure water vapor, nitrogen oxides, ammonia, alcohols, aldehydes and other components. The corresponding test gas is generated with the HovaCAL®.
- In humidity measurement, testing is often a requirement, since conventional saturation methods often don't obtain high water vapor levels or can only be changed slowly. HovaCAL® lets you set your target humidity precisely and quickly.
- In mercury detection, which is particular to flue gas analysis due to its small measuring ranges, the HovaCAL® is used to generate mercury-containing test gases with compositions similar to flue gas.
- In workplace monitoring, electro-chemical sensors are often used. These sensors are highly sensitive to the presence of dry test gases. With HovaCAL® test gases can be humidified, as well as produced from reagent solutions with a defined humidity.
- In flammable vapor monitoring, the goal is to check gas warning systems using the solvent to be monitored. For this purpose, HovaCAL® provides the desired test gas in the desired concentration.
HovaCAL® can also be used as a gas dilutor and gas mixer, in order to set cylinder gases such as SO2, CO, CO2, NOx, O2 etc. to the desired concentration. Moreover, it's possible to humidify this gas mixture to a defined degree over a broad humidity range. This gives us test gases which are very similar to the measuring gas in its complex composition, yet are defined and controllable.
Due to the elevated temperature of the resulting gas-vapor mixture, it is possible to specifically avoid adsorption and corrosion effects and thus significantly reduce the gas response time.