Bruggerstrasse 30 | CH-5413 Birmenstorf | Telephone: +41 56 470 92 00 | Fax: +41 56 470 92 09
Menu

gasQSTM static (Ex)

The micro electromechanical, screw-in OEM sensor – gasQSTM static (Ex) – is the perfect solution to analyse gas in an explosive atmosphere.

You can choose among the following specifications:

gasQSTM static (Ex) binary gas mixtures

Thermal conductivity is precisely identified using a microthermal sensor. For binary gas mixtures (e.g., biogas), it can derive the percentage of the gases as well as calculate various gas properties such as calorific value and density with high accuracy. Unlike the market standard, this robust, compact and inexpensive device requires neither any re-adjustment nor reference gas.

Specifications

Gas types: binary gas mixtures1, e.g., biogas
Accuracy: Percentage of gas in % < ± 1 % typ.
Calorific value2 (Hs, n)< ± 1 % of measured value (MV)
specific gravity2< ± 1 % of MV
Repeatability:± 0.1 % / ± 0.1 % / ± 0.1 %
Measurement time:1 s
Response time:gas exchange to 90 % in approximately 10 s
Temperature range:-20 ... +80 °C 3
Pressure range: 0.1 to 10 bar absolute
Permissible overload / burst pressure: 20 bar absolute
Weight:0.15 kg
Dimensions (d x h):51 x 54 mm
Connection:G3/8 external thread
Output signal:4 ... 20 mA
Supply voltage:+12 ... +28 Vdc
Maximum load: (Vsupply - 12 V)/0.02 A [Ohm] max.
IECEx/ATEX:Ԑx II 1G Ex ia IIC T4 Ga X

_____
1 Each component of a binary gas mixture may be already a known gas mixture by itself.
2 The provided accuracy applies only to binary gas mixtures. Depending on the covered gas composition spectrum, accuracy for
multi-component mixtures is different; see data sheet multicomponent gas mixtures
3 Extended temperature range on request

ATEX properties

Casing material: STANAL-32 EN AW-6023
[EN AW-Al Si1Sn1MgBi]
Sealings:NBR
Protection class:IP65
Max. input voltage Ui: 28 VDC
Max. input current Ii:0.1 A
Max. input power Pi:0.65 W
Max. internal capacity Ci:63 nF
Max. internal inductivity Li: 143 uH
Max. ratio internal inductivity to resistivity Li/Ri:2.19 uH/Ohm

WARNING: For use in hazardous areas, the instrument must be connected to a safety barrier. Mems AG recommends the KFD2-STC4-Ex1 safety barrier from Pepperl+Fuchs.
WARNING: For usage in zone 0 environment, the device must be protected against mechanical strokes

gasQSTM static (Ex) multicomponent gas mixtures

Thermal conductivity is precisely identified using a microthermal sensor. Thanks to its high sensitivity, the sensor is best suited for multicomponent gas mixtures to track changes in gas quality parameters. Unlike the market standard, this robust, compact and inexpensive device requires neither any re-adjustment nor reference gas.

Specifications

Gas types:H-gas, L-gas, gaseous LNG
Accuracy:Calorific value1 (Hs, n)< ± 2 MJ/m3 typ.
specific gravity1< ± 0.02
Repeatability:± 0.2 MJ/m3 / ± 0.002
Sensitivity2:± 0.4 MJ/m3 / ± 0.004
Measurement time:1 s
Response time:gas exchange to 90 % in approximately 10 s
Temperature range:-20 ... +80 °C 3
Pressure range: 0.1 to 10 bar absolute
Permissible overload / burst pressure: 20 bar absolute
Weight:0.15 kg
Dimensions (d x h):51 x 54 mm
Connection:G3/8 external thread
Output signal:4 ... 20 mA
Supply voltage:+12 ... +28 Vdc
Maximum load:(Vsupply - 12 V)/0.02 A [Ohm] max.
IECEx/ATEX:Ԑx II 1G Ex ia IIC T4 Ga X

_____
1 Depending on the covered gas composition spectrum, accuracy for multi-component mixtures is different; additional information on request.
2 Twice the value for repeatability
3 Extended temperature range on request

ATEX properties

Casing material:STANAL-32 EN AW-6023
[EN AW-Al Si1Sn1MgBi]
Sealings:NBR
Protection class:IP65
Max. input voltage Ui: 28 VDC
Max. input current Ii:0.1 A
Max. input power Pi:0.65 W
Max. internal capacity Ci: 63 nF
Max. internal inductivity Li:143 uH
Max. ratio internal inductivity to resisitivity Li/Ri:2.19 uH/Ohm

WARNING: For use in hazardous areas, the instrument must be connected to a safety barrier. Mems AG recommends the KFD2-STC4-Ex1 safety barrier from Pepperl+Fuchs.
WARNING: For usage in zone 0 environment, the device must be protected against mechanical strokes.

Prices and orders

We would be happy to put together a personal offer for you at your request.