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马杜手持烟气分析仪GA12
| 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 |
| 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 | |
马杜手持烟气分析仪GA12
3. Measurements of gas componentsTable 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 |
马杜手持烟气分析仪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 |
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