AERIUS

MICROTHERMAL GAS METER

Static microthermal gas meter for accurate measuring and recording of natural gas type H and air in household or commercial applications

The electronic gas meter AERIUS utilises a CMOS semiconductor sensor, which is placed in the bypass channel. The sensor is based upon a microthermal measuring principle and contains a heating element, which is flanked by two temperature sensors. The heating elemt is used to heat the gas; a uniform temperature distribution is formed, which is deferred through a gas flow. Therefore a temperature difference is generated between the two temperature sensors. The resulting measuring signal is processed by a microprocessor into a flow rate and therefore shows into standard volume (m³).

• CMOS Sensor Technology
• MID approval (PTB)
• Pressure independent
• Temperature converting
• Very low starting flow
• Differentiation between natural gas and air
• Interfaces wired M-Bus and wM-Bus Radio 868 or 434 MHz according to OMS®
• Noiseless
• Wear-free
• Compact design

• Technical Data

  Measuring principle			Microthermal - pressure independent and temperature converting
  Application			Natural gas type H (EN 437), air
  Measuring range		m³/h	0.04 ... 6.0
  Approval			MID (DE-11-MI002-PTB004), DVGW (DG-4710CM0427), ATEX
  Standard temperature for volume output		°C	0, 15 or 20
  Standard pressure for volume output		mbar	1013.25
  Max. operating pressure	Pmax	mbar	500
  Measuring accuracy Qt ... Qmax		%	± 1.5
  Measuring accuracy Qmin ... Qt		%	± 3.0
  Accuracy class			1.5
  Battery supply			1 x 3.6 VDC (D-Cell)
  Battery lifetime			Up to 20 years
  Max. accumulated volume		m³	99'999
  Starting flow rate		m³/h	0.009
  Heat resistance			HTB 650 °C according to EN 1359
  Display			1-line LCD 8-digit

• Ambient Conditions

  Operating temperature		°C	-25 ... +55
  Storage temperature		°C	-25 ... +70
  Protection class			IP 65

• Interfaces

  Optical			IRDA interface for communication and testing
  M-Bus			Telegram according to EN 13757-3, data reading and parametrization via two wires with polarity reversal protection
  Radio M-Bus			868 or 434 MHz according to EN 13757 OMS®, unidirectional, transmission interval 10 seconds up 1 hour, modulation: FSK