Brief information GasMete Elster Type QA65
Elster-Instromet quantometers are highly reliable gas meters, which can be used
throughout the entire fi eld of fl ow metering and which fulfi l 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 fl owing 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
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 fl ow of gas precisely and therefore optimise
the use of energy.
The QA quantometers are fi tted 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 fl ow 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 specifi c 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 fi lter must be connected in the inlet pipe, provided that the gas fl ow
is not free of foreign bodies and dust. The position of the installation can be selected as
The fl ow direction is clearly marked by an arrow on the meter housing.
Interfaces/Outputs: - QA: E1 Reed switch
- QA/QAe : E 200 Namur output
(in accordance with DIN EN 50227)
- QAe : Optical interface in accordance with EN 1434-3
- QAe : M-BUS interface in accordance with EN 1434-3
(Bus voltage approx. 40 V DC)
- QAe : L-BUS interface
(Bus voltage approx. 3.6 V DC,
open collector output)
Applications GasMete Elster Type QA65
Media : Methane, town gas, natural gas, air, inert gases.
Branches : Industry, trade, chemicals, food-stuffs.
Functions: Metering, control, regulation, registration.
Features GasMete Elster Type QA65
• Compact gas meter
• Meter sizes QA/e 10 – QA/e 1000
• Flow ranges 1.6 –1600 m3/h
• 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 to +60 °C
QAe: 0 °C to +50 °C
• 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 fl ow rate
- key-day values / key-day date
- back-fl ow volume
• Metering accuracy in wide ranges
independent of physical characteristics
of the gas such as density,
temperature and pressure
• DVGW approved