Gas Flowmeter


Quantometer QA/QAe : Flowmeter with mechanical (QA) or electronic index (QAe)


Elster-Instromet quantometers are highly reliable gas meters, which can be used through- out the entire field of flow metering and which fulfil all of the varying requirements of industrial metering. The QA and QAe quantometers work on the principle of the rotating turbine wheel. The rotation of the turbine wheel is proportional to the volume of the flowing gas and  this volume (Vb/m3 )  is registered  by either a mechanical  (QA) or an electronic (QAe) totalizer. Self-lubricating bearings  ensure  that the quantometers operate  completely without any maintenance.

On account of the proven metering principle and  the quality of the materials  in use, the quantometers meet the highest standards. By using the quantometers in production and heating processes, it is possible to control the flow of gas precisely and therefore optimise the use of energy.

The QA quantometers are fitted with a 7-digit mechanical  totalizer which registers the volume Vb in cubic meters (m3).

The QAe quantometers are equipped with an electronic totalizer. Besides the normal registration of the total volume (Vb, m3 ), the QAe can also display the flow rate (Qb, m3/h), the volume of a key-day (m3 / Vb on the key-day) and the date of the key-day. This means that the user can easily calculate the gas consumption for any specific part of the building or for any cost centre at any chosen time.

Installation tips: The Elster-Instromet quantometers can be installed easily in the straight pipeline. The inlet pipe should be 3 x DN, the outlet pipe should be 2 x DN in nominal size of the meter. A filter must be connected in the inlet pipe, provided that the gas flow is not free of foreign bodies and dust. The position of the installation can be selected as required.
The flow direction is clearly marked by an arrow on the meter housing.


Media:        Methane, town gas, natural gas, air, inert gases
Braches:    Industry, trade, chemicals, food-stuffs, district heating, power plants, petrochemicals, station building
Functions:    Metering, control, regulation, registration, monitoring, evaluation

Main features

  • Compact gas meter
  • Meter sizes QA/e 10 - QA/e 1000
  • Flow ranges 1.6 -1600 m3/hh
  • Measuring range up to 1:20, at higher pressures up to 1:50
  • Nominal width DN 25 - DN 150
  • Aluminium housing
  • Temperature ranges :
    QA: -10 °C up to +60 °C
    QAE: 0 °C up to +50 °C
  • Maintenance free
  • QA: protection class IP52
    7-digit mechanical index
  • QAe: protection class IP44
    -   7-digit LCD display showing:
    -   Actual volume (basic state)
    -   High-resolution volume (digits after the point)
    -   Current flow rate
    -   Key-day values /key-day date
    -   Back-flow volume
  • Metering accuracy in wide ranges independent of physical characteristics of the gas such as density, temperature and pressure
  • DVGW approved


TRZ 03 K Volumeter                            


Device for Secondary Metering

The TRZ 03, TRZ 03-E and TRZ 03-L turbine meters are flow meters which can be used for custody transfer metering. Unlike these instruments, the TRZ 03-K turbine meter can only be used for secondary metering. All three types of turbine meters measure the quantity of gas flowing through them in units of volume at prevailing pressure and temperature. Therefore, the units of volume are determined at flowing conditions. The volume of the gas flowing through is indicated by a mechanical totalizer in cubic meters at flowing conditions. In addition, the turbine meters can be fitted with HF or LF pulse transmitters and with reed contacts. In this way, pulses are obtained whose number is proportional to the volume which has flowed through. These pulses can be further processed by volume correctors.


Suitable for natural, non-aggressive and manufactured gases; nitrogen, carbon dioxide and propane; and other gases upon enquiry
Integrating flow meter with a special counter indicating flowing gas volumes at prevailing pressure and temperature (m³ at measurement conditions)
High measuring accuracy
Gas may flow horizontally or vertically
Optionally with mechanical drive shaft
Special design for aggressive gases is available

Tested according to DIN-DVGW Max. admissible 


pressure    = 100 bar

Max. admissible pressure p  up to 100 bar

Meter sizes 
   from Q    100 m³/h to Q    25,000 m³/h

Measuring range max.    1 : 16
DIN flange PN 10, PN 16, PN 25, PN 40, PN 100 and Flanges according to ANSI 150, ANSI 300, ANSI 600 in
DN 50, DN 80, DN 100, DN 150, DN 200, DN 250, DN 300, DN 400, DN 500, DN 600 or Single-flange design for DN 50 to DN 250



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