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GA-21 Plus Portable Gas Analyser
Brand: madurGA-21 Plus is a portable analyzer using advanced technologies. However, it remains madur’s flagship due to its favorable price.
It can be equipped with up to 9 electrochemical and NDIR sensors. Analyzer has a built-in pressure sensor, large internal memory for results and built-in ribbon printer for standard (non-thermal) paper.
Optional condensation “miniDryer” completes the offer for our best-selling portable device. plus GA-21 Plus as the measurement instrument meets requirements of EN 50379 and EN 50270.
Features- Produced in two kinds of casing: soft and hard
- Equipped with up to 7 electrochemical cells
- Equipped with up to 2 NDIR sensors
- NEW Thermal Conductivity Detector (TCD) for H₂, NEW Photoionization Detector (PID) for VOC (Volatile Organic Compound
- Built-in 58 mm ribbon graphic printer
- Built-in rechargeable battery for up to 7 hours of operating
- Peltier “miniDryer” with a peristaltic pump for condensate removal (optional)
- Probe holder with a standard M30 x 1 fitting, fits all madur gas probes with the K-type thermocouples
- Differential pressure sensor - for measurements of chimney draft and flow velocity (with help of Pitot tube)
- Soot measurement programme
- Measurements of gas and ambient temperatures
- 2 additional inputs for extra temperature sensors
- Analog outputs (0/4-20 mA or 0-10 V) - optional
- Built-in large memory for results, two formats of data savings
- Calculations of many additional parameters
- Gas filter with condensate trap and replaceable insert
- Firmware for gas calibrations
Specifications
Brand
Accuracy
- Carbon Monoxide, Carbon Dioxide, Methane, Hydrogen: ± 0.5 % Absolute or 5 % Relative
- Carbon Monoxide, Carbon Dioxide, Methane: ± 0.05 % Absolute or 5 % Relative
- Carbon Monoxide, Nitric Oxide, Nitrogen Dioxide, Sulphur Dioxide, Hydrogen Sulphide, Chlorine, Hydrogen Chloride, Volatile Organic Compounds: ± 5 ppm Absolute or 5 % Relative
- Carbon Monoxide: ± 0.005 % Absolute or 5 % Relative
- Differential Pressure: ± 2 Pa Absolute or 5 % Relative
- Excess Air Number (Lambda λ), Stack Loss (qA), Combustion Efficiency (Eta η): ± 5 % Relative
- External Analog Input: ± 2 % Relative
- External Temperature, Gas Flow Velocity: 0.3 m/sec Absolute or 5 % Relative
- Gas, Boiler Intake Air, External Temperature: ± 2° C (3.6° F)
- Hydrogen, Nitrous Oxide: ± 10 ppm Absolute or 5 % Relative
- Oxygen: ± 0.01 % Absolute or 5 % Relative
- Oxygen: ± 0.1 % Absolute or 5 % Relative
Ambient Temperature Range
- Boiler Intake Air Temperature: -10° to 100° C (14° to 212° F)
Approvals & Certifications
- CTM (Oxygen, Carbon Monoxide: 030), (Nitric Oxide, Nitrogen Dioxide: 022)
- EN (Carbon Monoxide: 15058), (Nitric Oxide, Ntrogen Dioxide, Sulphur Dioxide: 50379)
- ISO (Oxygen, Carbon Monoxide, Carbon Dioxide: 12039), (Nitrous Oxide: 21258)
- Volatile Organic Compounds: METHOD 21
Battery Life
- Charging Time: 14 Hours
- Work Time: 7 Hours
Cable Length
- Mains Cable (with Selectable Plug Typical): 10 feet (3 metres)
- RS-232C Communication Cable: 8.2 feet (2.5 metres)
Communication
- Communication Interface with PC Computer: RS-232C
Consumption
- Maximum
Differential Pressure
- psi: -0.36 to 0.36 (hPa: -25 to 25, bar: -0.025 to 0.025)
Display
- Graphical LCD 128 x 128 with Variable Contrast & Backlighting
Electrical Connectors
- DB9 Female Connector
Enclosure, Body Material
- Aluminum - Version B
- Textile (Polyester) - Version A
- Wood - Version B
Flow Rate
- Gas Flow: 90 L/hr (1.5 L/minute)
- Gas Pump: Diaphragm, Max.
- Purging Pump for CO Sensor: Diaphragm, 1.5 L/minute, Max.
Function
- Data Memory (Size: 32 KB)
- Printer (High-speed Dot Matrix, Graphic Printer for 58 mm Normal Paper)
Humidity
- 5 to 90 % Relative Humidity, Non-Condensing
Input
- External Analog Input: -20 to 20 mA
- External Analog Input: -20 to 20 V
Measuring Time
- 10 seconds (T90)
- Sensor: 45 to 120 seconds (T90)
Operating Temperature
- 10° to 50° C (50° to 122° F)
Output
- Analog: 0-10 V
- Analog: 0-20 mA
- Analog: 4-20 mA
Power Requirement
- Battery Typical: Lead-Acid, Rechargeable 12 V / 2.2 Ah
Power Supply
- 90-240 Vac
Range
- Combustion Efficiency (Eta η): 0 to 120 %
- Gas Flow Velocity: 1 to 50 m/sec
- Lambda λ - Excess Air Number: 1 to 10
- Sensor: 100 to 20,000 ppm
- Sensor: 5 to 100 %
- Stack Loss (qA): 0 to 100 %
Resolution
- Differential Pressure: 1 Pa (0.01 hPa)
- Excess Air Number: 0.01 λ
- External Analog Input: 0.01 mA
- External Analog Input: 0.01 V
- Gas Flow Velocity: 0.1 m/sec
- Gas, Boiler Intake Air, External Temperature: 0.1° C (0.18° F)
- Sensor: 0.001 to 0.1 %
- Sensor: 1 ppm
- Stack Loss (qA), Combustion Efficiency (Eta η): 0.1 %
Sensor, Probe Type
- K-TypicaL Thermocouple
- Pt500 Resistive Sensor
- Silicon Piezoresistive Pressure Sensor
- S-TypicaL Thermocouple
Storage Temperature
- 0° to 55° C (32° to 131° F)
Temperature Range
- -10° to 1,500° C (14° to 2,732° F)