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How the system works
- Heated glass probe. The probe and filter box are heated with a heat gun, so that nothing condenses before the absorption bottles. The filter holder and outlet are of chemically resistant glass, and a type K thermocouple shows the filter temperature.
- Absorption bottles in a stand. 250 ml borosilicate glass bottles with a glass insert and P1 frit, two or three in series in a light aluminium stand. The bottles are changed quickly between sub-samples, and the stands handle flows up to 15 l/min.
- CU-1 control unit. A built-in vacuum pump (up to −0.8 bar), a drying tower with regenerable silica gel, a flow meter and a gas meter for the sample volume, and a vacuum gauge for a quick leak test.
- Several in parallel. With several bottle stands and control units you sample several parameters at the same time from the same probe.
The parts of the system
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DX21-101 · DX21-102EVA Light glass probe
Heated glass probe, 1,000 or 1,500 mm, with interchangeable nozzles 4–12 mm. Options: an S-type pitot tube for velocity measurement and a type K thermocouple for the duct temperature.
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GM25-101 · GM25-102Bottle stand with absorption bottles
Stand for two or three bottles in series, 250 ml borosilicate glass with a removable glass insert and frit. Silicone connectors make them easy to take apart and wash.
Technical data CU-1-10
| CU-1-10 | Value |
|---|---|
| Sample flow | Up to 10 l/min, adjustable (CU-1-20: up to 20 l/min) |
| Vacuum pump | Built in, up to −0.8 bar |
| Drying tower | Regenerable silica gel |
| Flow and volume | Flow meter 0–10 l/min and gas meter |
| Leak test | Vacuum gauge |
| Maintenance | Removable rear cover for cooling and access |
Which parameters?
With the right absorption solution the system samples HCl, HF, SO2, SO3, NH3 and mercury, among others, and with a filter also metals. The method and standard that apply to each parameter are listed under All parameters.
Frequently asked questions about gas sampling
Which control unit should I choose?
CU-1-10 for sample flows up to 10 l/min, CU-1-20 when the method requires up to 20 l/min.
Can I sample metals with the same equipment?
Yes. The same system is used for metals and mercury – see Metals sampling.
Can I determine the moisture content at the same time?
Yes. The moisture content of the flue gas can be determined gravimetrically during the same sampling.
Can you measure for us instead?
We measure HCl, HF, SO2, NH3 and metals as part of the emission measurement.