馬杜手持煙氣分析儀GA12

1. General parameters – Version A （with replaceable AA batteries）

Dimensions （W x H x D） （drawing #1 below）	245 x 116 x 47mm
Weight （analyser itself without batteries and accessories）	470g
Housing material	ABS case, rubber protective boot （optional）
Operating conditions	T: 10°C ÷ 50°C, RH: 5% ÷ 90% （non-condensing）
Storing temperature	-20°C ÷ +55°C
Power supply	4 x AA battery （alkaline or Ni-Cd or Ni-MH）
Operating time （new alkaline batteries）	Up to 60 hours
Number of gas sensors	2 or 3 – see ordering guide
Memory for results	for 64 measurement reports
Display	Graphical LCD 128x64, with variable contrast and LED backlight
Gas pump	Diaphragm, max 0.6 ÷ 0.9l/min.
Printer	External thermal IR printer MCP 8850 with charger
Communication interface with PC computer	RS-232C
Gas probe: length | hose length | temp. range （drawing #2 below）	150mm or 250mm | 2m | 300°C max
Gas filtering	In-line filter included in the gas probe hose

2. GA-12 with built-in rechargeable Li-ion battery

Weight （analyser with a battery, without accessories）	510g
Power supply	Built-in Li-ion battery （3.6V, 1600mAh）
Operating time （battery fully charged）	Up to 16 hours
All other data is the same as in table 1

馬杜手持煙氣分析儀GA12

3. Measurements of gas components

Table below shows the combination of all sensors/ranges. Please mind that the maximum possible gas sensors number in a device is 3 – see ordering guide

Component	Method	Range | resolution	Accuracy	Time （T90）
O2 – Oxygen	O2-A2 electrochemical sensor	20.95% | 0.01%	± 0.1% abs. or 5% rel.	45 sec
O2 – Oxygen	O2-A2 electrochemical sensor	25.00% | 0.01%	± 0.1% abs. or 5% rel.	45 sec
CO – Carbon monoxide	CO-AF electrochemical sensor	2 000ppm | 0.1ppm	± 5ppm abs. or 5% rel.	45 sec
CO – Carbon monoxide	CO-AF electrochemical sensor	4000ppm | 1ppm	± 5ppm abs. or 5% rel.	45 sec
CO – Carbon monoxide	CO-AF electrochemical sensor	20 000ppm | 1ppm	± 10ppm abs. or 5% rel.	45 sec
CO – Carbon monoxide	CO-AE electrochemical sensor	10% （100 000ppm） | 10ppm	± 50ppm abs. or 5% rel.	45 sec
CO – Carbon monoxide	CO-AX electrochemical sensor with low H2 cross sensitivity	4 000ppm） | 1ppm	± 5ppm abs. or 5% rel.	45 sec
NO – Nitric oxide	NO-AE electrochemical sensor	2 000ppm | 0.1ppm	± 5ppm abs. or 5% rel.	45 sec
NO2 – Nitrogen dioxide	NO2-AE electrochemical sensor	1 000ppm | 0.1ppm	± 5ppm abs. or 5% rel.	45 sec
SO2 – Sulphur dioxide	SO2-AE electrochemical sensor	2 000ppm | 0.1ppm	± 5ppm abs. or 5% rel.	45 sec
H2S – Hydrogen sulphide	H2S-AE electrochemical sensor	2 000ppm | 0.1ppm	± 5ppm abs. or 5% rel.	45 sec

馬杜手持煙氣分析儀GA12

4. Other measurements / calculated results

Variable	Method	Range | resolution	Accuracy	Time （T90）
Tgas – gas temperature	K-type thermocouple	-10 ÷ 1000°C | 0.1°C	± 2°C	10 sec
Tamb – boiler intake air temperature	PT500 resistive sensor	-10 ÷ 100°C | 0.1°C	± 2°C	10 sec
Differential pressure	silicon piezoresistive pressure sensor	-25hPa ÷ +25hPa | 1Pa （0.001hPa）	± 2Pa abs. or 5% rel.	10 sec
Gas flow velocity （optional）	Indirect, with Pitot tube & pressure sensor	1 ÷ 50m/s | 0.1m/s	0.3m/s abs. or 5% rel.	10 sec
RH – relative humidity	SHT11 capacitive polymer sensor （special probe needed）	5 ÷ 95% | 1%	± 5% abs.	30 sec
Lambda λ – excess air number	calculated	1 ÷ 10 | 0.01	± 5% rel.	10 sec
qA – stack loss	calculated	0 ÷ 100% | 0.1%	± 5% rel.	10 sec
Eta η – combustion efficiency	calculated	0 ÷ 120% | 0.1%	± 5% rel.	10 sec