Engineering & Science Associates Co., Ltd. BIOGAS ANALYSIS
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BIOGAS ANALYSIS

 maMoS

maMoS – modular stationary gas analyser

Small in size, yet very skilful analyser – it has the best capabilities/price ratio. maMoS is our alternative for large, intricate CEMS systems, as it does not fall behind them concerning functionality and abilities, and is far ahead in terms of expenses.
It has modular construction, and many add-ons, that makes it easy to adjust to a very specific, individual application.
Powerful PC software allows to adjust many aspects of the work with the analyser very individually (work schedule, analogue outputs' behaviour, data presentations, and more...)

Features
Technical data
Ordering guide
Equipment and add-ons

Main features

  • Standard configuration consists up to 4 sensors (NDIR and electrochemical).
  • Up to 6 sensors in an extreme, unique configuration.
  • 1 to 6 LCD 4.5 digit displays.
  • Different types of gas dryers to fit the customers needs.
  • Compact, Split and Twin split configurations.
  • Data-logger with SD card for results’ collection.
  • Analogue outputs (both current and voltage) to control external devices.
  • Digital and analogue inputs to pass signals from external devices, to trigger maMoS actions.
  • Communication with PC via different interfaces (RS-232, USB, LAN, Bluetooth, Wi-Fi, GSM).
  • Different work modes to select from (continuous measurements, work with scheduler, measurements triggered with digital input, “work in-turns” - allows to measure from two different sources, and more...).
  • Powerful PC program to adjust the analyser's settings and to view the results.
  • Rich offer of add-ons and accessories.

Compact vs split configuration

Compact configuration

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Compact configuration - analyser with gas dryer on a common mounting plate, all installed near the measurement place

 

Split configuration

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Split configuration - analyser and gas dryer are installed on separate mounting plates, each equipped with its own power supply module.
Gas dryer is installed near the measurement place, analyser can be installed in a distance from the dryer (in the operation convenient place). Analyser can be far away from the dryer, as the gas in the between connection is suitably prepared for measurement.

 

Twin split configuration

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Twin split configuration - analyser and two gas dryers, each on its own mounting plate, each equipped with a power supply module.
Allows to perform measurements from two different locations (each dryer is installed near the measurement place). maMoS measures in turns - one cycle per location.

Complete and ready to operate maMoS unit

Drawing shows analyser in a compact configuration with a MD3 condensation dryer.

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Gas and electric connectors (analyser’s bottom view)

Connection panel for the standard configuration with double gas channel

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Connection panel for the overpressure configuration with a single gas channel

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Configurations of the analyser’s gas channel

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Analyser with a single gas channel is basic configuration of the device

 

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The second (additional) gas channel is enabled for shorter time during the measurement phase. The additional gas channel is dedicated for the ”fragile” sensors, where they are protected against too long exposure to the gas. This way the life-time of the fragile sensors is prolonged.
Bio-measurement is a typical application for the double gas channel configuration - then the primary gas channel holds sensors CO2, CH4, O2, and the additional gas channel holds the H2S sensor that is recognised as a fragile one.

 

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Analyser designed to work with overpressure with a single gas channel. Configuration can be used in installation with slight overpressure (<1.8bar)

MD2 & MD3 gas dryers

Dryers

Example PC programme screenshots

PC
 

1. General parameters – analyser unit

Dimensions (W x H x D) 240mm x 360mm x 160mm
Weight (depends on equipment) 4kg ÷ 5kg
Casing's material ABS
Mounting plate: dimensions (H x W) | material | weight 596mm x 450mm | aluminium | 1.9kg
Operating conditions T: 10°C ÷ 50°C, RH: 5% ÷ 90% (non-condensing)
Storing temperature 0°C ÷ 55°C
Power consumption (analyser unit only) 30W max
Data-logger: type | size | number of results SD flash card | max 4GB | practically unlimited
Display: type | maximum number of display bays 4.5 digit | 6 (data-logger occupies one bay)
Gas pump: type | max gas flow | standard gas flow Diaphragm | max 2l/min | 1.5l/min (90l/h) - with automatic flow control
Current analogue outputs 4 outputs 0mA ÷ 20mA or 4mA ÷ 20mA
Voltage analogue outputs 4 outputs 0V ÷ 5V or 0V ÷ 10V
Digital inputs 2 inputs, TTL levels, floating=high level
Digital outputs 1 open collector output + 2 SPDT relays (optional)
Communication interface with PC computer RS-232C

2. General parameters – power supply unit

Dimensions (W x H x D) 360mm x 130mm x 56mm
Weight (depends on equipment) 1.4kg
Casing's material aluminium
Mounting plate Power supply is mounted on common plate with analyser unit
Operating conditions T: +10°C ÷ +50°C, RH: 5% ÷ 90% (non-condensing)
Storing temperature -20°C ÷ +55°C
Input voltage 100 ÷ 240V AC 50/60Hz
Output voltage 24V DC / 6.3A | 150W
Output current 6.3A max
Mains fuse 6A
Cable pass 2 pcs PG-9

3. Gas dryer - MD2 gas dryer

Dimensions (W x H x D) 211mm x 74mm x 82mm
Weight 450g
Drying method Water condensation by rapid cooling down
Cooler type Based on Peltier cooling element with fan (7VDC supply)
Cooling temperature Down to +4°C electronically stabilised
Dew point of outlet gas 8°C below the temperature of inlet gas.
Ready to operate after 10 minutes
Operating conditions T: 0°C ÷ 35°C, RH: 5% ÷ 90% (non-condensing)
Storing temperature -20°C ÷ +60°C
Maximum gas flow for efficient drying
(at inlet gas temp. 100°C and RH 100%)
40l/h
Gas filter Integrated, with condensate reservoir and replaceable insert
Filter insert: length | ID | OD | material | pore size 32mm | 15mm | 20mm | PE | 5μm
Condensate removal With peristaltic pump installed in analyser's body
Peristaltic pump capacity 38ml/min
Power supply Via maMoS (through 15-pin D-SUB connector)
Power consumption 9W

4. Gas dryer - MD3 gas dryer

Dimensions (W x H x D)
Without filters: 110mm x 205mm x 160mm
With Filters: 145mm x 240mm x 160mm
Weight 1790g (single filter version)
Drying method Water condensation by rapid cooling down
Cooler type Based on Peltier cooling element with fan (12VDC supply)
Cooling temperature Constant, about +1°C, output gas dewpoint about +4°C
Ready to operate after 5 minutes
Operating conditions T: 0°C ÷ 50°C, RH: 5% ÷ 90% (non-condensing)
Storing temperature -20°C ÷ 60°C
Maximum gas flow for efficient drying
(at inlet gas temp. 100°C and RH 100%)
100l/h
Gas filters: quantity | material 1 (optionally 2) | PA – body, PC – cover, viton – sealing
Filter insert: length | ID | OD | material | pore size 42mm | 26mm | 32mm | glass fibre | 2μm
Power supply Standard: via maMoS (through 15-pin D-SUB connector)
Standalone version via external supply module: 85V ÷ 264V AC / 24V DC
Condensate removal With built-in peristaltic pump
Peristaltic pump capacity 38ml/min
Power consumption 30W

5. 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 6 EC and/or 3 NDIR – seeordering guide.

Component Method Range | resolution Accuracy Time (T90)
O2 – Oxygen Electrochemical sensor 20.95% | 0.01% ± 0.1% abs. or 5% rel. 45 sec
O2 – Oxygen Electrochemical, partial pressure 20.95% | 0.01% ± 0.1% abs. or 5% rel. 45 sec
O2 – Oxygen Electrochemical, partial pressure 25.00% | 0.01% ± 0.1% abs. or 5% rel. 45 sec
O2 – Oxygen Electrochemical, partial pressure 100.00% | 0.1% ± 0.1% abs. or 5% rel. 45 sec
CO – Carbon monoxide Electrochemical sensor 20 000ppm | 1ppm ± 5ppm abs. or 5% rel. 45 sec
CO – Carbon monoxide Electrochemical, with H2 compensation 2 000ppm | 1ppm ± 5ppm abs. or 5% rel. 45 sec
CO – Carbon monoxide Electrochemical sensor 10% | 10ppm ± 50ppm abs. or 5% rel. 45 sec
CO – Carbon monoxide NDIR 10% | 0.01% ± 0.05% abs. or 5% rel. 45 sec
CO – Carbon monoxide NDIR 50% | 0.01% ± 0.05% abs. or 5% rel. 45 sec
CO – Carbon monoxide NDIR 100% | 0.1% ± 0.5% abs. or 5% rel. 45 sec
CO2 – Carbon dioxide NDIR 25% | 0.01% ± 0.05% abs. or 5% rel. 45 sec
CO2 – Carbon dioxide NDIR 50% | 0.01% ± 0.05% abs. or 5% rel. 45 sec
CO2 – Carbon dioxide NDIR 100% | 0.1% ± 0.5% abs. or 5% rel. 45 sec
CxHy – Total Hydrocarbons NDIR 5% | 0.01% ± 0.05% abs. or 5% rel. 45 sec
CxHy – Total Hydrocarbons NDIR 25% | 0.01% ± 0.05% abs. or 5% rel. 45 sec
CxHy – Total Hydrocarbons NDIR 100% | 0.1% ± 0.5% abs. or 5% rel. 45 sec
NO – Nitric oxide Electrochemical sensor 5 000ppm | 1ppm ± 5ppm abs. or 5% rel. 45 sec
NO2 – Nitrogen dioxide Electrochemical sensor 1 000ppm | 1ppm ± 5ppm abs. or 5% rel. 45 sec
SO2 – Sulphur dioxide Electrochemical sensor 5 000ppm | 1ppm ± 5ppm abs. or 5% rel. 45 sec
H2S – Hydrogen sulphide Electrochemical sensor 1 000ppm | 1ppm ± 5ppm abs. or 5% rel. 45 sec
H2 – Hydrogen Electrochemical sensor 2 000ppm | 1ppm ± 10ppm abs. or 5% rel. 45 sec
H2 – Hydrogen Electrochemical sensor 20 000ppm | 1ppm ± 10ppm abs. or 5% rel. 45 sec
NH3 – Ammonia Electrochemical sensor 1 000ppm | 1ppm ± 10ppm abs. or 5% rel. 45 sec
N2O – Nitrous oxide NDIR 2 000ppm | 1ppm ± 10ppm abs. or 5% rel. 45 sec
CHF3 – Fluoroform (Refrigerant R23) NDIR 2.5% | 0.01% ± 0.05 abs. or 5% rel. 45 sec
CL2 - Chlorine Electrochemical sensor 250ppm | 1ppm ± 5ppm abs. or 5% rel. 45 sec
HCl - Hydrogen chloride Electrochemical sensor 50ppm | 1ppm ± 5ppm abs. or 5% rel. 120 sec

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
Tgas – gas temperature S-type thermocouple -10 ÷ 1500°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 Indirect, with Pitot tube & pressure sensor 1 ÷ 50m/s | 0.1m/s 0.3m/s abs. or 5% rel. 10 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

Drawings

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