GA21 Plus®Portable Gas Analyser

GA21 Plus®

Portable Gas Analyser

GA21 Plus® is a portable gas analyser designed for short to medium term monitoring of emissions and process gas. Produced for harsh operating conditions, the GA21 Plus® portable gas analyser can be equipped with up to 9 (gas proprietary) measuring cells amongst a large selection of compounds commonly targeted in the industry. With its compact and basic design, the GA21 Plus® offers unique multiple sensor options, integrated and calibrated as per the application requirements. Separate gas paths and gas proprietary cells allows combining performant and reliable NDIR, PID, TCD as well as electrochemical field replaceable sensors into the same equipment.

O2, CO, CO2, CH4, H2, Cl2, HCl, H2S, NO, NO2, N2O, VOCs and SO2

For gases with high moisture content, a compact gas dryer completes the built in sampling system. The GA21 Plus® portable gas analyser has a built-in differential pressure sensor for gas velocity, large internal memory for storage of several weeks of emissions data. Its built-in ribbon printer for standard (non-thermal) paper allows on the spot printing of user configurable reports for fast and efficient regulatory inspection of boilers and engines.

Simple and featuring the most advanced sampling and measuring technologies, the GA21 Plus® is an affordable but powerful tool you can rely on for emissions testing and process control operations.

GA21 Plus® Plus portable gas Analyser meets requirements of EN 50379 and EN 50270.

Unique sensor combination in a simple, compact and affordable portable gas analyser

GA21 Plus®

Brochure

GA21 Plus® Portable Gas Analyser

Exclusive features

NDIR, PID, TCD and ElectroChemical Cells
Equipped with up to 9 gas measuring cells. Typical configurations includes process gas monitoring at biogas plant (O2, CO, H2S, CH4, CxHy), Environmental compliance monitoring (NO, NO2, O2, CO, SO2) and combustion efficiency (CO, NO, O2). The GA21 features by default the measurement of gas velocity as well as process gas and ambient air temperatures (optional probes required).
Gas Sampling Probe
Standard or Heated (for hot and wet gases), the probe holder fitted with one exchangeable gas sampling probe (available in variable lengths and materials) forms a complete sampling gun essential to convey the sample from the sampling point to the analyser buitlin sampling system.
Data capture
Built-in real-time acquisition and instant processing of process parameters : Gas temperature, Boiler intake air temperature, Differential Pressure, Gas velocity, Excess air number, Stack loss, Combustion Efficiency…
Differential pressure sensor
Differential pressure sensors for measurements of chimney draft and flow velocity. Pitot tube, digital RH and temperature sensors required.
Powerful interface
Built In printer for fast printing of inspection user configurable report, firmware for assisted gas calibration, built-in large memory for results saving, results presented on LCD display (128×128) with backlight.
15 hours of operation
High performance, cost effective gas analyser for short to medium term stack testing operation, with up to 14 hours of work (Lead-acid, rechargeable 12V / 2,2 Ah).

GA21 Plus® Gas Sampling Probe

with built-in temperature sensor and inline filter

Probe-holder-Portable-gas-analyser-GA21-AquaGas

Standard Probe

Heated Sampling Line-Portable-gas-analyser-GA21-AquaGas

Heated Sample Line

Fast and safe gas sampling

Probe Assembly-Portable-gas-analyser-GA21-AquaGas

Sampling probe with K-type thermocouple (other type on request)

Standard or Heated Sampling line

Exchangeable gas sampling probe (available in various lengths and materials)

Inline filter and condensate trap (2m)

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Heated Sampling Line-2-Portable-gas-analyser-GA21-AquaGas

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GA21 Plus® Measured Gases

The GA21® Portable Gas Analyser offers multiple sensor configurations. Here are the measuring parameter for the most common gases.

For other gases or different measuring ranges, please consult us.

Gas	Technology	Resolution	Measuring range	Accuracy	Response time T90	Conformity
H2S	AE electrochemical sensor	0,1 ppm	2000 ppm	± 5 ppm abs.	45 sec	EN 50379; CTM-030
SO2	AE electrochemical sensor	0,1 ppm	2000 ppm 5000 ppm	± 5 ppm abs.	45 sec	EN 50379; CTM-030
O2	A2 electrochemical sensor	0,01%	20,95%	± 0,01% abs.	45 sec	EN 50379; CTM-030
O2	A2 electrochemical sensor	0,01%	25,00%	± 0,01% abs.	45 sec	EN 50379; CTM-030
O2	A2 electrochemical sensor	0.1%	100.00%	±0.1% abs	45 sec	ISO 12039, CTM-030
CO	AF electrochemical sensor	0,1 ppm	4000 ppm	± 5 ppm abs.	45 sec	EN 50379; CTM-030
CO	AF electrochemical sensor	1 ppm	4000 ppm	± 5 ppm abs.	45 sec	EN 50379; CTM-030
CO	AF electrochemical sensor	1 ppm	20000 ppm	± 10 ppm abs.	45 sec	EN 50379; CTM-030
CO	AE electrochemical sensor	0,001%	10 %	± 0,005% abs.	45 sec	EN 50379; CTM-030
CO	AX electrochemical sensor with low H2 cross interference sensitivity	1 ppm	2000 ppm	± 5 ppm abs.	45 sec	EN 50379; CTM-030
CO	NDIR	0.01%	10%	±0.05% abs.	45 sec	EN 15058
CO	NDIR	0.1%	100%	±0.5% abs.	45 sec	EN 15058
NO	AE electrochemical sensor	0,1 ppm	1000 ppm 5000 ppm	± 5 ppm abs.	45 sec	EN 50379; CTM-030
NO2	AF electrochemical sensor	0,1 ppm	1000 ppm	± 5 ppm abs.	45 sec	EN 50379; CTM-030
CO2	NDIR	0.01%	25%	±0.05%	45 sec	ISO 12039
CO2	NDIR	0.01%	50%	±0.05%	45 sec	ISO 12039
CO2	NDIR	0.1%	100%	±0.5%	45 sec	ISO 12039
CH4	NDIR	0.01%	5%	±0.05%	45 sec
CH4	NDIR	0.01%	25%	±0.05%	45 sec
CH4	NDIR	0.1%	100%	±0.5%	45 sec
N2O	NDIR	1 ppm	2000 ppm	±10ppm abs.	45 sec	ISO 21258
H2	Thermal Conductivity Detector	0,1%	10% 25% 50% 100%	0,1%	45 sec
CL2	Electrochemical sensor	1 ppm	250 ppm	±5ppm abs.	60 sec
VOC	PID Photo Ionization Detector	1 ppm	100 ppm 1000 ppm	±5ppm abs.	120 sec	Method 21
HCl	Electrochemical sensor	1 ppm	100 ppm	±5ppm abs.	70 sec

GA21 Plus® Accessories

Extensive range of add-ons

Printer

Bluetooth wireless thermal printer

Wireless receivers

Bluetooth and modem for remote control

Bluetooth-Portable-gas-analyser-GA21-AquaGas

Peltier Gas Cooler

Hot swap gas cooler module

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Stack Testing Equipment

Gas conditioners, Sampling Probes, Multigas Analysers, Handheld Units and more…

GA21 Plus® Portable Gas Analyser

Tailored to TODAY’s industrial requirements

Typical Applications

Process gas and emissions monitoring in combustion plants, boilers, syngas, biogas, waste recycling facilities (Waste to Energy) and associated filtration systems are typical applications for the GA21® Portable Gas Analyser.

Landfills

“Landfilling” is the main method for disposal of municipal and household solid wastes or refuses in Australia. Although maintained in an oxygen-free environment and relatively dry conditions, landfill waste produces significant amounts of landfill gas (mostly methane). The Mamos enables process and air pollution emissions monitoring from solid waste landfills. Landfills operations require the control of methane CH4 and non-methane organic compound emissions (NMHC) emitted as well as an accurate online monitoring of the gas composition (CH4, CO, CO2, H2, H2S and O2). This effectively requires the collection and combustion of landfill gases. So, a good solution to the landfill gas problem is to collect it and use it to produce electricity. Landfill gas (LFG) entering the gas sampling system is saturated with water, and that water must be removed prior to further processing. The typical dry composition of the low-Btu gas is 57% CH4, 42% carbon dioxide, 0.5% nitrogen, 0.2% hydrogen, 0 to 1000 ppm of H2S and 0.2%oxygen. In addition, a significant number of other compounds are found in trace quantities. These include alkanes, aromatics, chlorocarbons, oxygenated compounds, other hydrocarbons and sulfur dioxide.

Biogas Plants

In biotechnological processes, the detailed monitoring of the fermentation product, in this case biogas, provides valuable information. Therefore, it is recommended to monitor both the volume of gas produced and the gas composition. With regard to process monitoring, a change in either gas production or gas composition can be an indicator of process imbalance.

Biogas primary constituents

CH4 and H2S measured during the methanation process give a good overall view of the performance of the degradation process and bacterial activity. A decrease in methane content can be a first sign of organic overload, provided that the feedstock mix has not recently changed. Similarly, a sudden increase in H2S can provoke process instability.
Simultaneous real-time monitoring of CH4, H2S and CO2 empower process automation (i.e. operation of scrubbers)
Before entering the distribution chain, the product must be qualified, again for economic reasons (excess H2S and/or CO2 in the CH4 would make it ‘sour’ and potentially corrosive enough to damage distribution infrastructure)
CH4, H2S, CO, CO2 and O2 Continuous Stack Emissions Monitoring required for environmental compliance

Emissions testing and regulatory inspections

Small and medium installations of combustion: gas burners, heating systems…

Large combustion plants: In coal and gas fired power stations, cement kiln, foundry, paper mills… Stringent regulatory requirements for emission monitoring and reporting. The GA21 Plus® Portable Gas Analyser enables efficient and flawlessly compliance for a large range of contaminants.

Gas Treatment Centres

Accuracy and high reliability in harsh conditions of operations makes the GA21® Portable Gas Analyser a powerful optimisation tool for waste recycling facilities (incinerator, water treatment plant).

SCR and SNCR Selective non-catalytic and catalytic reductions are designed to reduce the emissions of NOx by injecting ammonia is directly injected at the combustion chamber exhaust. This process causes the nitrogen oxides to react with the ammonium and turn into nitrogen and water. The GA21® Portable Gas Analyser is suited to upstream and downstream SNCR/SCR short term testing and provides plants operator with accurate data to control NOx regulatory emissions while optimising the denitrification process with upstream NOx measurements.

GTC and flue gas scrubbers reduce the emissions of acid gases such as SO2 with pulverised lime powder or solutions while the discharge of heavy metals and organic pollutants is controlled with the addition of activated carbon. Accurate monitoring of O2, SO2 upstream of the GTC allows reducing the quantity of reagents injected.

Syngas Plants

The use of process gas handheld gas analysers enables short term control of the gas composition at locations such blast furnace gas outlet, converter off gas exhaust and coking gas outlet in order to analyse the fuel gases composition by measuring the concentration of CO, CO2, O2, N2, CH4, and H2. There from the calorific value BTU and the Wobbe Index WI can be accurately calculated. Modern steel plants uses dedicated stationary online monitoring system to monitor the primary constituents of Direct Reduction Iron process gases essential to have a full understanding of the process status and efficiency.

Madur user references

Madur

GA21 Plus®

Unique sensor combination in a simple, compact and affordable portable gas analyser

GA21 Plus® Portable Gas Analyser

NDIR, PID, TCD and ElectroChemical Cells

Gas Sampling Probe

Data capture

Differential pressure sensor

Powerful interface

15 hours of operation

GA21 Plus® Gas Sampling Probe

Standard Probe

Heated Sample Line

Fast and safe gas sampling

GA21 Plus® Measured Gases

GA21 Plus® Accessories

Printer

Wireless receivers

Peltier Gas Cooler

Stack Testing Equipment

GA21 Plus® Portable Gas Analyser

Typical Applications

Landfills

Biogas Plants

Emissions testing and regulatory inspections

Gas Treatment Centres

Syngas Plants

Madur user references

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