gasQS™ flonic

Assemble, configure, forget – the gasQS flonic can be tailored flexibly to your application and does not require any calibration or carrier gases.

gasQS static

Based on a microthermal CMOS sensor in combination with a critical nozzle and two valves, heat conductivity, heat capacity and the relative density of natural gas can be measured. From these parameters, the device correlates various output values.

The system has been developed completely by Mems AG. Thanks to the complex knowledge of the physics, the individual components and their interaction, customer-specific applications can be flexibly implemented.

  • Standalone device that does not require carrier gases
  • Setup of an additional automatic control measurement possible due to integrated control output
  • Additional output values can be added at any time in the current application
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Suitable for high hydrogen content
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Fast measurement
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Easy to integrate
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Reliable
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Individually adaptable

AREAS OF USE

Natural gas networks

Elektronik

Gas indicators such as calorific value, density, real gas factors and hydrogen content can be determined with our measuring device. It also provides support in process monitoring.

Processing industry

FW & SW

The gasQS technology is also used in gas mixing processes. Production processes can thus be managed and at the same time the proportions of binary and ternary gases are determined.

Gas engines

Messtechnik

Our measuring device increases the efficiency of gas engines: optimization of effectiveness, calorific value and methane number monitoring and lowering of the emission values.

LNG

FW & SW

Whether to determine the gas properties of boil-off, optimize effectiveness or reduce emissions on ships - our gasQS measuring devices can be used in diverse areas.

SPECIFICATIONS

For the specifications, select the corresponding standard version below. Should the specifications not be suitable for your application, contact us.

Measurement range

Natural gases (DVGW G 260 2te gas family) are covered with the specifications below. Additionally, the measuring accuracy can be increased by restricting the gases to H-gases, L-gases or biogases.

Density (dn)

0.711 … 0.970 kg/m3

Heating value (Hi)

27.0 … 43.0 MJ/m3

Calorific value (Hs)

30.2 … 47.2 MJ/m3

Wobbe number (Ws)

39.6 … 56.5 MJ/m3

Methane number AVL

60 … 100

Accuracy

Density (dn)

± 0.007 kg/m3

Heating value (Hi)

± 1.0 MJ/m3

Calorific value (Hs)

± 1.0 MJ/m3

Wobbe number (Ws)

± 1.0 MJ/m3

Methane number AVL

± 3

Repeatability

Density (dn)

± 0.003 kg/m3

Heating value (Hi)

± 0.5 MJ/m3

Calorific value (Hs)

± 0.5 MJ/m3

Wobbe number (Ws)

± 0.5 MJ/m3

Methane number AVL

± 2

Statistical distribution value with 2 sigma of 48 measuring points

Measuring time, measuring interval, reaction time

Measuring time≤ 30 seconds
Measuring intervalcontinuous, programmable
Reaction timeT90 within 3 measuring intervals

Operating / storage temperature

- 10 … + 55 °C

Explosion protection

May be used for zone 1 – and thus also for zone 2.

How often should one perform a calibration check on the gasQS ™ flonic?

The gasQS flonic as a process instrument experiences wear from the conditions of the process in which it is installed. Temperature cycles, electronic component tolerance shift including the sensor chip and contamination build up over time on the sensor chip will all contribute to affecting the accuracy of the instrument. It should therefore regularly undergo, at a minimum, a calibration check if not a recalibration. But how often?

gasQS flonic does not have specified due dates for calibration. Mems AG designed the device from the very beginning in such a way that the above influences have the smallest possible effect on the long-term behavior of the sensor.

The inlet valve is protected by a double-mesh filter against the entry of dirt particles. A further filter shields the sonic nozzle from particles larger than its throat diameter. The chip sensor has passed its long-term test in several million passenger cars as a mass flow meter of the intake air, but also in household gas meters, over more than 6 years, no reduction in performance of the sensor could be detected. Due to the similar set-up as in the gas meter, no contamination of the chip, which would impair its function, is to be expected even in long-term operation with non-condensing gases. All electronic components meet the requirements of the strict standards of the automotive industry, so no premature aging effects should occur from this side either.

Mems suggests that gasQS flonic undergoes a calibration check once a year including a filter change at the device inlet. However, based on the application conditions, and perhaps company quality procedures, each customer must determine when they need to send in an instrument for recalibration.

The easiest way to check is with methane of the quality ≥99.5%. The measured values can be compared with those of the initial test in the "Calibration Documentation" supplied with the instrument. The values for "Lambda Ratio", "Pressure Ratio" and "Flow Ratio" output in the registers 0x0020 to 0x0025 or 0x7020 to 0x7025 should all display the value 1 within half a percent. If this is not possible, Mems is happy to take on this task for its customers.

We would be happy to provide you with a personal quote

Florian Krischker

Product Manager gasQS
Phone: +41 (0)56 481 90 74
flrnkrschkrmmsch

Florian Krischker

Explanatory video gasQS™ technology

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