Perma Pure Hybrid Sample Gas Cooler
Advanced sample conditioning for CEMS and analytical systems
The Hybrid Sample Gas Cooler combines Nafion™ membrane technology with mechanical cooling for reliable sample conditioning in industrial measurement environments. This system offers a low-maintenance solution for sample conditioning without electrical power, ideal for CEMS installations, process analysis and OEM integration.
Technical operating principle
Dual-technology approach
1. Nafion™ permeation drying
Nafion™ membrane technology selectively removes water vapour in the gas phase via chemical diffusion. This prevents analyte loss and eliminates the risks of condensation in the sample gas lines. Water passes through the membrane in vapour form, while analytes such as SO₂, NOₓ, CO₂ and other components pass through the system unhindered.
2. Mechanical cooling (instrument-air driven)
A patented vortex cooling configuration lowers the gas temperature below the dew point without electrical energy. The system runs on compressed air (4 bar / 60 PSI) and effectively reduces sample humidity to below 0°C dew point. This approach eliminates thermoelectric components (Peltier elements), which are prone to failure and cause high maintenance costs.
Result
The combination delivers dry, condensation-free gas samples with minimal analyte loss, suitable for accurate measurements in FTIR, NDIR, chemiluminescence and other analysis techniques.
Advantages for sample conditioning
Operational advantages
Non-electric mechanical design
- Lowers installation costs: eliminates costs for electrical installation and permits
- Simplifies maintenance: no thermoelectric components that fail or degrade
- Lowers maintenance costs: minimal moving parts, robust construction
- Increased reliability: results in reduced downtime for 24/7 industrial environments
Higher efficiency
- Superior performance: works more efficiently than comparable non-electric coolers
- Lower compressed air consumption: optimised vortex cooling design
Analytical advantages
Dew points lower than 0°C
- Reduces the risk of analyser damage: prevents condensation in optical cells, sensors and flow paths
- Verlaagt spectrale interferentie: Lage restvochtconcentratie elimineert H₂O-absorptiebanden in IR-spectrometrie
Nafion™ gas-phase drying
- Minimal analyte loss: drying in the gas phase prevents washout of water-soluble components
- Stable measurements: consistent sample conditioning improves measurement accuracy and repeatability
Technical performance
| Parameter | Specification |
|---|
| Dew point output | < 0°C |
| Operating temperature | 4 – 55°C (ambient) |
| Max. inlet temperature | 138°C (280°F) |
| Max. inlet moisture concentration | 40% (v/v) |
| Maximum gas flow | 3,5 L/min @ 50°C5 L/min @ 20°C |
| Sample gas pressure (max) | 2 bar (30 PSI) |
| Instrument air consumption | 100 SLPM @ 4 bar (60 PSI) |
| Drain/exhaust | 7 SLPM air + condensate |
Full Operating Environment:Typical Operating Environment:
Physical specifications & construction
Housing
| Parameter | Specification |
|---|
| Dimensions (H × W × D) | 600 × 250 × 120 mm (24" × 10" × 5") |
| Weight | 9,1 kg |
| Material | Glass-fibre reinforced polyester |
| Rating | NEMA 4, 4X / IP65 |
| Certification | UL/CUL Listed |
| Mounting | Wall mounting, vertical |
Materials (wetted path)
| Component | Material |
|---|
| Gas path components | PVDF/FEP Teflon™ |
| Fittings | PVDF |
| Filter housing | Kynar® (PVDF)/glass |
| Sample filter | Glass fibre, 0,1 µm, 95% efficiency, coalescing type |
| O-rings | Viton® |
| Insulation | Rubber foam (Buna-N) |
Connections
| Type | Specification |
|---|
| Sample gas | 1/4" tube compression fitting |
| Umbilical seal | Heat shrink type, 5" length, 2" min. expanded I.D. |
| Grounding | Grounding lug required for installation |
Fields of application
Emission monitoring (CEMS)
- Power plants (coal, gas, biomass)
- Waste incineration plants
- Industrial furnaces and boilers
- Petrochemical processes
Measured components: SO₂, NOₓ, CO, CO₂, O₂, HCl, HF, NH₃
Process analysis
- Chemical production
- Refineries
- Steel and cement industry
- Food and pharmaceutical production
OEM integration
- Gas analysers (FTIR, NDIR, UV)
- Multi-component analysers
- Portable emission monitoring systems (PEMS)
- Stack testing equipment
Challenging environments
- Offshore platforms (limited electrical infrastructure)
- Remote measuring stations (no stable mains power)
- Mobile monitoring units
- Analyser shelters with limited cooling capacity
Comparison with alternative technologies
| Aspect | Hybrid cooler | Peltier cooler | Vortex cooler |
|---|
| Energy source | Compressed air | Electricity | Compressed air |
| Dew point | < 0°C | +4°C typical | Variable |
| Analyte loss | Minimal (gas phase) | Risk with condensation | Risk with condensation |
| Maintenance frequency | Low | Medium-high | Medium |
| Electrical safety | N.v.t. (non-electric) | ATEX/IECEx required | N.v.t. |
| Service life | > 10 years | 3-5 years (Peltier element) | 5-7 years |
Installation considerations
Requirements
- Instrument air: 100 SLPM @ 4 bar (60 PSI), dry and oil-free
- Ambient temperature: > 4°C (conditioning requires frost protection)
- Drain: outlet for 7 SLPM air + condensate (gravity or pump)
- Mounting space: at least 650 × 300 mm (including service clearance)
- Grounding: electrical grounding according to local regulations
Integration
- Mount upstream of the analyser for optimal protection
- Can be combined with heated sample lines (max. 138°C inlet)
- Compatible with extractive CEMS configurations
- Suitable for analyser sheds, outdoor cabinets and wall-mount installations
Available through Inacom Instruments for CEMS and OEM applications.
