Perma Pure MiniGASS

Perma Pure MiniGASS™ Gas Sampling Systems

Integrated 3-in-1 sample conditioning for CEMS and industrial gas analysis

MiniGASS™ sample conditioning systems combine coalescing filtration, PID-controlled heating and Nafion™ gas-phase drying down to -25°C in one compact unit. This integrated approach eliminates condensation, protects analysers against contamination and retains water-soluble analytes, which is essential for reliable CEMS measurements, process analysis and OEM integration.

The MiniGASS series prepares hot, humid and contaminated gas samples by removing particles, acid mists and water vapour step by step without analyte loss. This results in reduced analyser downtime, extended service intervals and lower maintenance costs in challenging industrial environments.

Technical operating principle

MiniGASS systems condition gas samples in an integrated three-step process:

1. Sample filtration Coalescing filter elements effectively remove particles, mist and aerosols from the gas stream. This prevents clogging, corrosion and damage to downstream analysers. Filter elements are available in different pore sizes (0.01-20 µm) and materials for optimal performance with specific gas compositions.

2. Heating and temperature control An integrated PID temperature controller with display controls the heated filter/probe assembly (480W silicone pad heater). This keeps the sample above the dew point during pre-conditioning and prevents condensation, even at inlet temperatures up to 275°F (135°C).

3. Nafion™ gas-phase drying Nafion™ membrane technology selectively removes water vapour from the gas stream down to dew points of -25°C or lower. This gas-phase drying retains water-soluble analytes (SO₂, NH₃, HCl, HF) and prevents the analyte loss that occurs with condensation-based methods. Available in three capacities: 50-tube (≤1 LPM), 100-tube (2-3 LPM) or 200-tube (4-6 LPM).

Technical advantages

Integrated 3-in-1 solution

• Complete sample conditioning in one compact unit reduces installation complexity and commissioning time
• Eliminates the need for separate filtration, heating and drying systems
• Standardised interface simplifies OEM integration

Drying to very low dew points

• Nafion™ drying down to -25°C prevents condensation in sample lines and analyser optical cells
• Eliminates water-vapour-related spectral interference in FTIR and NDIR analysers
• Reduces CEMS downtime through stable, dry gas samples

Retention of water-soluble analytes

• Gas-phase drying without condensation retains SO₂, NH₃, HCl, HF and other soluble components
• Essential for accurate emission measurements according to IED and BREF guidelines
• Prevents analyte loss and measurement inaccuracies

Extended analyser service intervals

• Effective particle and mist removal (down to 0.01 µm) protects analyser components
• Typical extension of maintenance intervals: 3-12 months depending on gas composition
• Reduced costs through fewer analyser failures and lower spare parts consumption

Chemical resistance for corrosive applications

• NEMA Type 4X enclosure for aggressive environments (-20°C to 40°C ambient)
• Fluorocarbon wetted materials (PVDF/FEP) or 316SS for SO₂, NOₓ, HCl, HF and acid gas streams
• FKM O-rings and glass-fibre coalescing filters for maximum service life

Technical specifications

Physical

Utility requirements

Environmental

Sample gas limits

Control and Electrical

Materials

System configurations

MiniGASS 1228W: wall mount system

Wall-mount version in a robust NEMA Type 4X glass-fibre reinforced polyester enclosure with integrated coalescing filter, PID temperature control, purge gas flowmeter, pressure regulator and digital display. Suitable for CEMS analyser shelters, process analysis cabinets and outdoor installations. UL-508A Listed and CSA C22.2 certified.

MiniGASS 1228P: probe mount system

Probe-mount version for direct stack installation with a transparent enclosure for visual inspection during operation. Complete instrumentation including purge gas flowmeter and PID controller. Compact footprint for mounting in confined spaces with flange options from 2" to 6" (150#). Optional gas cooling spools available for high process temperatures.

Fields of application

Emission monitoring (CEMS) - compliance & reporting

Energy sector - coal, gas and biomass power plants. Continuous SO₂, NOₓ, CO, CO₂, O₂ measurements according to the IED (Industrial Emissions Directive), BREF documents and national guidelines for emission reporting.

Waste processing - waste incineration plants, medical waste incinerators and hazardous waste incineration. Compliance monitoring for HCl, HF, heavy metals and dioxin-related parameters.

Industry - cement kilns, steel plants, glass furnaces and the ceramics industry. Process emission monitoring and EU ETS reporting for CO₂ emissions trading.

Process analysis & optimisation

Chemical industry - reactor off-gas monitoring, process optimisation and safety monitoring of toxic components. Real-time feedback for process control in high-humidity environments.

Petrochemicals - refinery process streams, flare gas monitoring and catalytic cracker units. Sample conditioning for corrosive gas streams with H₂S, SO₂ and other acid-forming components.

OEM integration & stack testing

FTIR, NDIR, UV/VIS gas analysers, multi-component CEMS systems and portable emission monitoring systems (PEMS). Modular configuration for fast integration into analyser platforms and mobile stack testing equipment.

Ordering & technical support

For configuration advice, sizing and project support, please contact Inacom. Specify in your request:

• Gas composition and concentrations (including corrosive components)
• Sample flow rate, pressure and temperature
• Mounting environment (indoor/outdoor, hazardous area classification)
• Required dew point and analytical requirements (analyser type, measuring range)
• CEMS compliance requirements (IED, BREF, national guidelines)