"Fluidistor" 
Gas Flow Meter
GD 300 Ex / GD 500 Ex

GD300-COLLAGE

"Fluidistor" 
Gas Flow Meter
GD 300 Ex / GD 500 Ex

GD300-COLLAGE

Our experience - your success!

Welcome to “Fluidistor”!!

The Fluidistor gas flow meter offers a solution for precise gas quantity measurement that is crucial for your success.

As manufacturer of the Fluidistor, Esters Elektronik GmbH can draw on nearly 50 years of experience in the industrial area of ​​measurement and control technology.

The Fluidistor gas flow meter GD 300 Ex / GD 500 Ex is developed and produced exclusively in Germany by qualified specialists.

See for yourself!

Basic questions about the Fluidistor!

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What is a Fluidistor?

A "Fluidistor" is a gas flow meter for gas quantity or gas volume measurements.
The type designations are GD 300 Ex or GD 500 Ex.

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What is the Fluidistor measurement principle? 

The Fluidistor flow meter GD 300 Ex / GD 500 Ex operates according to the principle of a „Fluidistor oscillator“.
The gas passes the Fluidistor measuring head either directly or via an orifice in the main pipe.

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What kind of gases can be measured?

The Fluidistor can be used to measure biogas, industrial gases as well as all technical and medical gases.

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Wet and dirty gases?

No problem!  
The measuring of wet and dirty gases, such as sewage gas, biogas or contaminated industrial process gases do not influence the measurement results.

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Mixed gases with a variable gas composition/mixtures?

No problem!
Changes of the gas composition in mixed gases do not affect the measurement result.

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Maintenance! Expensive?

No!
The Fluidistor keeps you independent!
The replacement of the platinum wire sensor or a cleaning of the Fluidistor can be done by yourself on site.
No recalibration required!

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Application Areas

Sewage gas

Contamination and high water vapor saturation of the gas results with other measurement principles to erroneous measurements at the digester.
The Fluidistor is the functioning alternative!

Biogas

Humidity and sulfur loads of several 100 ppm lead to measurement errors.
The Fluidistor is the functioning alternative!

Medical gases

Consumption measurement of oxygen, nitrous oxide, xenon, nitrogen, medical carbon dioxide and helium from total strand up to the healthcare beds or operating room with the Fluidistor

Industrial gases

Quantity measurement of carbon dioxide (fermentation and cooling), argon (steel production), nitrogen, oxygen and natural gas (burner control, supply control of the boiler)
The Fluidistor also works with changing gas mixtures!

Compressed air controlling

Liter precise collection of consumption volume for billing purpose and identification of potential savings

Hydrogen

Exact gas volume measurement of hydrogen

Examples of Application

Sewage gas

Avoiding incorrect measurements at the digestion tower
The measurement principle of the Fluidistor is the functioning alternative!

Biogas

Produce - Electricity - Feeding
The Fluidistor gas flow meter for all processes on your biogas plant!

Principle of Measurement

The Fluidistor gas flow meter GD 300 Ex/GD 500 Ex operates according to the principle of a „Fluidistor oscillator“. The gas passes the Fluidistor measuring head either directly (GD 500 Ex) or via an orifice (GD 300 Ex) in the main pipe.

The gas is discharged through the orifice into the
Fluidistor measuring chamber. Directly behind the inlet there is a triangular damming body, which, due to the unstable middle position, forces the gas either to flow past on the right or left. At the level of the damming body  …

A detailed description can be found either in our video or click “More”!

The Fluidistor gas flow meter GD 300 Ex/GD 500 Ex operates according to the principle of a „Fluidistor oscillator“. The gas passes the Fluidistor measuring head either directly (GD 500 Ex) or via an orifice (GD 300 Ex) in the main pipe.

The gas is discharged through the orifice into the
Fluidistor measuring chamber. Directly behind the inlet there is a triangular damming body, which, due to the unstable middle position, forces the gas either to flow past on the right or left. At the level of the damming body  …

A detailed description can be found either in our video or click “More”!

Overview and Highlights

GD300-COLLAGE

The Fluidistor gas flow meter GD 300 Ex / GD 500 Ex is used for gas volume measurements and for technical and medical gases.

The flow meters work on the principle of “fluidistor oscillator”. The measuring principle is dense independent and has no moving parts, thus there are no wearing parts in place and a recalibration is not necessary.

The Fluidistor gas flow meters are available from DN 15 – DN 400.

  • DN 15 – DN 25 (1/2″ – 1″) with an external pipe thread
  • DN 25 – DN 200 sandwich / Wafer 
  • DN 40 – DN 400 with flange

Highlights

  • oscillating measuring principle suitable for almost all types of gas (including mixed gases), no moving components

  • oscillating measuring principle suitable for almost all types of gas (including mixed gases), no moving components

  • measuring housing, orifice and measuring labyrinth made of stainless steel, also available as heavy duty construction

  • resistant to dirt, e.g. oil, rust, sulphur
  • excellent results measuring moist gases with condensate

  • mounting in falling direction into gas lines even for 100 % wet biogas due to integrated condensate drain

  • no influence on the measurement results with dirty, moist gases, e.g. sewage gas, biogas or contaminated industrial process gases

  • no influence on the measurement results for mixed gases with variable gas compositions
  • optional integrated ball valve (blocking valve) in the GD 300 for removal/installation of the platinum sensor without emptying the system

  • integrated calculator HB 300 in the measuring head with mA- (normalization optional) or pulse output

  • short response time T90 ≤ 50 ms with a flow velocity ≥ 0,25 m/s

  • high accuracy (±1,5 % of true value)

  • high reproducibility (0,1 % of true value)

  • low pressure loss

  • each flowmeter with calibration report
  • no recalibration required

  • Ex II 1 / 2 G Ex ia / e mb IIC T4 Ga / Gb (Zertifikat Nr. EX5 13 07 14689 003)

Technical Data

GD 300 Ex

Wafer / Sandwich

GD_300_Wafer

Nominal size:
DN 25 to DN 250

Process connection:
Wafer / Sandwich / intermediate flange

Installation lenght: 
65 mm

GD 300 Ex

flange

GD_300_FLANSCH

Nominal size:
DN 40 to DN 400

Process connection:
flange acc. to DIN EN-1092-2 or
DIN 2576, flange acc. to ASME B 16.5

Installation lenght: 
depending on nominal size (300 – 500 mm)

GD 500 Ex

external pipe thread

GD_500

Nominal size:
DN 15, DN 25

Process connection: 
external pipe thread
R 1/2”
G 1”

Installation lenght: 300 mm

  • Maintenance
  • Planning
  • Installation Instructions
  • Accuracy of Measurement
  • Pressure Loss

With us you stay independent!

With the Fluidistor GD 300 Ex / GD 500 Ex you are completely independent concerning repair & maintenance.

The oscillating measuring method according to the Fluidistor principle requires no moving parts and no sensitive sensor materials, therefore an almost maintenance-free operation of the GD 300 Ex / GD 500 Ex is possible.

The integrated platinum wire sensor can be replaced without removing the gas flowmeter from the pipe system. A sensor change does not affect the calibration of the flow meter.

Recalibrations at regular intervals are not required and the cleaning of the flowmeter can be made directly on site. You can check the functionality of the sensors independently and gain independence from external resources.

You do not have to order  a service technician to come onsite or to remove the flow meter and send it in.

Planning
Project planning gas measurement
  • In the project planning, ensure that the pipe size is not increased by the gas meter in order to avoid false measurements.

  • The defined measurement ranges for individual nominal diameters must not be exceeded. A straight inlet zone of 10 x DN and an outlet zone of 5 x DN is required.

  • In the pipe network preceding the flowmeter, the gas velocity may not exceed supersonic speed.

  • Supercritical pressure drops and pulsating flows must be avoided.

  • When installing the GD 300/GD 500 under the ceiling, a distance of at least 25 cm from the lid to the ceiling must be complied, that the lid can be removed for connecting the sensor cable.

  • When installing the GD 300 Ex Wafer note that the lid is on the left-hand side, a minimum distance of 25 cm is required.

  • In case of falling below the Qmin (measuring range) display of measured values is not possible.

  •  The flow meter GD 300 Ex / GD 500 Ex can be installed in a horizontal or vertical position. A condensate drain is integrated in the measuring head, which ensures the outflow of condensate of 100% wet gas without sediments

  • The inclined measuring head ensures the outflow of condensate when installed in horizontal pipes.

At low flow rates the density (or actually the viscosity) of the gas influences the accuracy.

Above the limit value (Qt), the accuracy is 1,5 % of the measured value. Below Qt the accuracy is 5 % of the measured value.

Example measurement range:

Qt bei 1,5% accuracy

DN inches m3/h kg/Nm3 m3/h
mm
Qmin (5 %)
Qt (1,5 %)
density
%
Qmax
15
1/2"
0,06
3,52
0,5
16
22
80
3"
8,0
64
1,0
8
800
80
3"
8,0
48
1,2
6
800
150
6"
30,0
240
1,0
8
3.000
150
6"
30,0
180
1,2
6
3.000
DN (mm) inches m3/h Qmin (5%) m3/h Qt (1,5%) kg/Nm3 (density) m3/h % m3/h Qmax
15
1/2"
0,06
3,52
0,5
16
22
80
3"
8,0
64
1,0
8
800
80
3"
8,0
48
1,2
6
800
150
6"
30,0
240
1,0
8
3.000
150
6"
30,0
180
1,2
6
3.000

Exampla:

At a density of x kg/m3 the limit value is Qt = y % of Qmax.

For natural gas with a methane component of 85 % a density of 0,85 kg/m3 is assumed.

DN m3/h
0,5
=
16 %
1,0
=
8%
1,2
=
6%
2,0
=
4%
4,0
=
2%
8,0
=
1%

The diagram applies to gases with a density of air at NTP (0°C and 1013 mbar). The decrease of pressure is always proportional to the gas density. If e.g. the operating pressure rises by 100% the pressure drop doubles.

Flow Computer GDR 1501

GD300-GDR1501
GD 300 with wafer connection and GDR 1501 (NON-ATEX area)

The flow computer of the GDR 1501 series are used to calculate the current gas quantity. The actual amount of gas can be displayed in cubic meters or liters on an hourly or minute basis. The total quantity counter can be output in cubic meters or liters. The counter can display up to 100 million cubic meters. The resolution is 0.1 litres.

 

Highlights

  • Connection of GD 100 / GD 500 directly to platinum wire sensor (NON-ATEX zone),  ATEX zone withHead Barrier HB 300 Ex.
  • Connection of gas flow meters form other manufactures via Open-Collector, Reed-Relais
  • 4-line display of 20 characters
  • Multilingual menu (german, english, italian, french, spanish, more in
    progress)
  • Capacitive and wear-free touch keypad
  • Full device configuration via touch keypad, no additional software required
  • Protection of the configuration via security code 
  • Recording of essential actions with time stamp in the system logbook (device start, sensor failure, overrange, etc.)
  • Easy and fast cable connection thanks to tool-free push-in connections
  • Housing material made of UV-resistant polycarbonate,
    protection class: IP 65
  • Persistent meter reading for 5 years
  • Integrated real-time clock, battery buffered over 5 years
  • Standardization according to DIN 1343, DIN 6358, DIN ISO 2533, DIN 102/ISO 1-1975
  • Freely scalable current output for the current flow
  • Adjustable pulse weighting (0.1, 1 or 10 or 100 m3 per pulse)
  • Optional data transfer via PROFIBUS DP, Profinet, Modbus RTU, Modbus TCP

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  • Datasheet
  • Instruction Manual
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