Meter for Compressed Air and Gases
Inline-Flow Sensor BMG 1025
The BMG 1025 series is ideally suited for consumption measurement of individual compressed air units thanks to its compact design and favorable price–performance ratio. The gas meter has an integrated flow rectifier and can thus be installed directly on the machine. In addition to the total consumption, the BMG 1025 sensor measures the process variables of the compressed air network such as flow velocity, media temperature, and optionally media pressure. As an alternative to the serial interface, the sensor can also be equipped with a pulse output (consumption in m³, l, kg) and an analog output (flow velocity in l/min, m³/h) for traditional measurement data acquisition.
The high-contrast LCD display in the sensor head shows two selectable measured values and their maxima in real time. If required, the display can be rotated by 180°, thus simplifying reading in the case of overhead installation. Installation is position-independent and, thanks to the threaded connection integrated in the measuring block, can be carried out in existing DN8 to DN50 pipelines with little effort. The flow straightener integrated in the measuring block allows installation directly on the machine without taking inlet and outlet distances into account.
Features
- Display of compressed air consumption, gas velocity, and gas temperature
- Gas pressure measurement (option)
- Consumption measurement with 1.5% accuracy
- Direct mounting on the machine without inlet or outlet section
- Pipe connection via measuring block with standard thread
- Measurement data can be read out remotely via RS485 interface (Modbus RTU)
- Alternative interfaces: M-Bus, Modbus TCP, or Modbus TCP PoE interface available
- Optionally with analog output (4/20 mA) and pulse output (option)
- Also suitable for nitrogen measurement
- Best price-performance ratio
Technical data
| Measuring principle | Thermal mass flow sensor |
| Medium | Compressed air or nitrogen (N2) |
| Measured quantities | m³/h, l/min (compressed air acc. to ISO 1217: 20°C, 1,000 hPa) Nm³/h, Nl/min (N2 acc. to DIN 1013: 0°C, 1,013.25 hPa) |
| Measuring accuracy | ±1.5% f.m. ±0.3% f. f. o. m. = of measured value; o. f. = of final value |
| Measuring range (max.) | 6.3…1,195 m³/h (depending on type: see measuring table in data sheet) |
| Operating pressure (max.) | 16 bar abs. |
| Operating temperature medium | –20…60°C |
| Pressure measurement (option) | 0…16 bar, accuracy 1% |
| Integrated interface | RS485 field bus acc. to EIA485 Standard: Modbus-RTU Optional: M-Bus acc. to EN 13757, Modbus TCP, Modbus TCP – PoE (power over Ethernet) Connection: M12 X-coded connector plug |
| Analog output | Alternative to serial interface: 4…20 mA for gas flow in m³/h or l/min, connection: M12 X-coded connector plug |
| Pulse output | Alternative to serial interface: Pulse signal galvanically isolated. Pulse value in Imp/m³ or Imp/l adjustable on display. Pulse output can also be used as alarm relay |
| Auxiliary voltage/power consumption | 18…36 V DC/5.0 W |
| Case sensor head | Polycarbonate (IP 65) |
| Material measuring block | Aluminum |
| Connection thread in measuring block | G ¼”, G ½”, G 3/4″, G1″, G 1 ¼”, G 1½”, G 2″ (BSP) |
| Dimensions of sensor head with measuring block (W × H × D) in mm |
135 × 55 × 109.1 (depending on type: see measurement table in data sheet)
135 × 80 × 139.1 (depending on type: see measurement table in data sheet) |
Variants
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BMG1025 DN32-G1 1/4 Item number: 004688 Internal thread: G1 1/4
Measuring range end value: 530 Nm³/h
Max. Pressure: 16 bar
Dimensions aluminum measuring block: 135x55x109 mm (LxWxH)
Interface: 1x Modbus RTU according to EIA 485
alternatively against surcharge: 4…20mA, pulse, M-Bus or Modbus TCP/TCP PoE
-
BMG1025 DN40-G1 1/2 Item number: 004689 Internal thread: G1 1/2
Measuring range end value: 730 Nm³/h
Max. Pressure: 16 bar
Dimensions aluminum measuring block: 135x55x109 mm (LxWxH)
Interface: 1x Modbus RTU according to EIA 485
alternatively against surcharge: 4…20mA, pulse, M-Bus or Modbus TCP/TCP PoE
Interfaces and accessories
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BMG1025 C-ADA Item number: 004849 Analog / digital output for Inline Sensor BMG1025.
Replacement of the serial interface by two analog/digital outputs*.
1x digital output parameterizable as pulse or alarm contact for consumption/limit value monitoring.
1x analog output 0/4…20 mA for instantaneous measured values;
incl. M12 connector
-
BMG1025 Z-DS Item number: 004848 Pressure sensor for BMG1025 inline sensor for the measuring unit of the BMG1025 inline sensor. Extension of the standard measuring function by gas pressure detection.
Measuring range: 0 …16 bar (absolute)
Accuracy: 1% of measured value
Note: Measured values are transmitted via the serial interface.
No measured value indication on the display.
- Note: When using the option, the Modbus RTU interface is omitted.
Insertion Sensor BMG 1500
This consumption meter is ideal for extremely high flow rates in humid air up to a temperature of +180°C. Typical applications are measurements of the delivery rate of compressors as part of compressed air audits or efficiency measurement of compressed air systems. Due to the integrated, precise differential pressure sensor, the differential pressure/pressure at the sensor tip is measured. This is dependent on the respective gas velocity. Based on the pipe diameter, it is thus easy to determine the flow rate.
With the help of the additional measurement of temperature and absolute pressure, the calculation of the respective density can also be measured in a wide variety of gases at a broad range temperatures and pressures.
Features
- For measurement directly downstream of the compressor in moist air up to +180°C
- Particularly suitable for extremely high flow rates
- Extremely fast response time: 100 ms
- Flow rate, total consumption, temperature, and pressure
- Measurement at high temperatures up to max. 180°C
- Can be used in pipes from DN 20 to DN 500
- Installation via 1/2″ ball valve under pressure
- RS 485 interface (Modbus RTU), 4…20 mA and pulse output as standard
- Optionally with M-Bus interface
- Integrated display
Technical data
| Measuring range | 224 m/s (standard), 600 m/s (optional) |
| Measuring medium | Air, inert gases |
| Accuracy (o. m. = of measured value) (o. f. = of final value) |
±1.5% o. m., ±10.3% o. f. (20…224 m/s) ±1.5% o. f., (>224 m/s) |
| Measuring principle | Differential pressure/accumulation pressure |
| Measuring span | 1:10 |
| Response time | 100 ms |
| Medium temperature | –30…180°C |
| Ambient temperature | –30…+70°C |
| Operating pressure | Max. 20 bar |
| Screw-in thread | G 1/2″, ISO 228 |
| Power supply | 18…36 V DC, 5 W (except TCP PoE) |
| Signal outputs | Standard: RS 485 (Modbus RTU), 4…20 mA, pulse Optional: M-Bus, Modbus TCP, Modbus TCP PoE |
Variants
-
BMG1500 M Item number: 004683 Installation length: 220mm for nominal values up to DN125
Max. Pressure: 20 bar
Max. gas temperature: 180°C
Interfaces: Modbus RTU (RS485)
Outputs: 1x analog (4…20mA), 1x pulse -
BMG1500 XL Item number: 004691 Installation length: 400 mm for nominal values up to DN150-500
Max. Pressure: 20 bar
Max. gas temperature: 180°C
Interfaces: Modbus RTU (RS485)
Outputs: 1x analog (4…20mA), 1x pulse
Interfaces
*Note: When retrofitting the M-Bus interface, the S0 output is omitted for design reasons.
Insertion Sensor BMG 1000
This consumption meter for compressed air and technical gases is ideal for use as a sub-meter. It operates according to the calorimetric measuring principle and does not require additional pressure and temperature compensation. The evaluation electronics record all measured values digitally, precisely, and quickly. The meter is equipped with a Modbus interface as standard or with an M-Bus interface on request. The classic design as a measuring section (as a threaded design or flange) can be installed in all pipes, regardless of position. All meters in this series can be easily removed, for example, for cyclic cleaning without having to remove the entire measuring section. Immediately and fully integrable into any energy management software program.
Features
- Standard with Modbus RTU interface
- Optionally with M-Bus or Modbus-TCP interface
- Integrated multiline color display
- Easy installation under pressure possible
- Pulse output for m³/h and optional output 4…20 mA
- Measuring accuracy ±1.5% of measured value, optional 1%
- Measuring device rotatable
- Installation independent of position
- Consumption meter resettable
- Supply via 24 V DC
- Ideal for connection to Efficio energy management software
Technical data
| Measured quantities | m³/h, l/min (1,000 mbar, 20°C) for compressed air or Nm³/h, Nl/min (1,013 mbar, 0°C) for gases |
| Units via keyboard adjustable via display |
m³/h, m³/min, l/min, l/s, ft/min, cfm, m/s, kg/h, kg/min |
| Adjustable via display | Diameter for volume flow calculation, counter resettable |
| Measuring principle | Calorimetric measurement |
| Sensor | Thermal mass flow sensor |
| Measuring medium | Air |
| Other gas types via external device DS 400 adjustable |
Nitrogen, argon, helium, CO2, oxygen |
| Measuring range | See measurement table in data sheet |
| Accuracy (o. m. = of measured value) (o. f. = of final value) |
±1.5% o. .m. ±0.3% o. f., on request: ±1% o. m. ±0.3% o. f. |
| Operating temperature | –30…80°C |
| Operating pressure | Up to 50 bar |
| Digital output | RS 485 interface, Modbus RTU |
| Analog output | 4…20 mA for m³/h or l/min; on request: scaling for cfm, m³/min, l/min, l/s, ft/min, m/s |
| Pulse output | 1 pulse per m³ resp. per liter galvanically isolated. Pulse value adjustable on display |
| Power supply | 18…36 V DC, 5 W |
| Power consumption | <500 Ω |
| Case | Polycarbonate (IP 65) |
| Sensor tube | Stainless steel, 1.4301, installation length 220 mm, Ø 10 mm |
| Mounting thread | G 1/2″ |
| Ø case | 65 mm |
Variants
Calibration, interfaces, and accessories
-
BMG1000/20/50/70 C-POE Item number: 003965 Additional Modbus TCP interface PoE for BMG1000, BMG1020, BMG1050
or BMG1070 consumption and flow sensors.
Interface: 1x Power over Ethernet Interface (Modbus TCP) according to
IEEE 802.3af, PD Class 2 (max. 6.5W)
Voltage: 36V to 57V DC; Connection: M12 connector with X-coding
Note: With TCP version the pulse output and the M-Bus interface are omitted.
-
BMG1000/20/50/70 C-ETH Item number: 003964 Additional Modbus-TCP interface for BMG1000, BMG1020, BMG1050 or
BMG1070 consumption and flow sensors.
New interface: 1x Ethernet interface (Modbus TCP)
Connection: M12 connector with X-coding
Note: For TCP version, the pulse output and the M-Bus interface are omitted.
Consumption Sensor BMG 1020
This consumption meter with built-in measuring section for compressed air and technical gases is ideal for use as a sub-meter. It operates according to the calorimetric measuring principle and does not require additional pressure and temperature compensation. The evaluation electronics records all measured values digitally, precisely, and quickly. The meter is equipped with a Modbus interface as standard or with an M-Bus interface on request. The classic design as a measuring section (as a threaded design or flange) can be installed in all pipes, regardless of their position. For larger pipe cross sections from DN 50 to DN 300, the insertion sensors of the 1000 series are available. All meters in this series can be easily removed, for example, for cyclic cleaning without having to remove the entire measuring section. Immediately and fully integrable into any energy management software program.
Features
- Standard with Modbus RTU interface
- Optional with M-Bus or Modbus TCP interface
- Integrated multiline color display
- Easy installation under pressure possible
- Pulse output for m³/h and optional output 4…20 mA
- Measuring accuracy ±1.5% of measured value, optional 1%
- Measuring device rotatable
- Installation independent of position
- Consumption meter resettable
- Supply via 24 V DC
- Ideal for connection to Efficio energy management software
Technical data
| Measured quantities | m³/h, l/min (1,000 mbar, 20°C) for compressed air or Nm³/h, Nl/min (1,013 mbar, 0°C) for gases |
| Units via keyboard adjustable on display |
m³/h, m³/min, l/min, l/s, ft/min, cfm, m/s, kg/h, kg/min |
| Measuring principle | Calorimetric measurement |
| Sensor | Thermal mass flow sensor |
| Measuring medium | Air |
| Other gas types adjustable via external device DS 400 | Nitrogen, argon, helium, CO2, oxygen |
| Measuring range | See measurement table in data sheet |
| Accuracy (o. m. = of measured value) (o. f. = of final value) |
±1.5% o. m. ±0.3% o. f., on request: ±1% o. m. ±0.3% o. f. |
| Operating temperature | –30…80°C |
| Operating pressure | Up to 16 bar optionally up to PN 40 |
| Digital output | RS 485 interface, Modbus RTU |
| Analog output | 4…20 mA for m³/h resp. l/min |
| Pulse output | 1 pulse per m³ or per liter galvanically isolated. Pulse value adjustable on display |
| Power supply | 18…36 V DC, 5 W |
| Power consumption | <500 Ω |
| Case | Polycarbonate (IP 65) |
| Sensor tube | Stainless steel, 1.4301 or 1.4404 |
| Mounting thread | R 1/4″, R 1/2″, R 3/4″, R 1″, R 1 1/4″, R 1 1/2″, R 2″ male thread |
Variants
Calibration, interfaces, and accessories
-
BMG1000/20/50/70 C-POE Item number: 003965 Additional Modbus TCP interface PoE for BMG1000, BMG1020, BMG1050
or BMG1070 consumption and flow sensors.
Interface: 1x Power over Ethernet Interface (Modbus TCP) according to
IEEE 802.3af, PD Class 2 (max. 6.5W)
Voltage: 36V to 57V DC; Connection: M12 connector with X-coding
Note: With TCP version the pulse output and the M-Bus interface are omitted.
-
BMG1000/20/50/70 C-ETH Item number: 003964 Additional Modbus-TCP interface for BMG1000, BMG1020, BMG1050 or
BMG1070 consumption and flow sensors.
New interface: 1x Ethernet interface (Modbus TCP)
Connection: M12 connector with X-coding
Note: For TCP version, the pulse output and the M-Bus interface are omitted.
-
BMG1020 Measuring Head Item number: 004822 Consumption sensor measuring head for 2 inch measuring section for retrofitting in existing compressed air or technical gas lines. Sensor initially calibrated for compressed air (other gas types optional). Remote readout via integrated interfaces, local measured value indication on display. Measuring head without measuring section.
Insertion Sensor BMG 1050
This meter operates according to the calorimetric measuring principle. Additional temperature and pressure compensation is therefore not necessary. Due to the robust construction, the aluminum die-cast housing and the robust sensor tip made of stainless steel 1.4571, it is suitable for demanding industrial applications. For use cases in explosive environments, an ATEX version is available. For consumption measurements, for example, of natural gas, there is a version with DVGW approval. The electronic evaluation unit records all measured values digitally, precisely, and quickly, and a wide temperature range up to 180°C is possible. The measuring span is 1 to 1000 and thus allows measurements from very low to very high flow velocities.
As standard, the meter has a Modbus RTU output for all measured quantities such as Nm³/h, Nm³, Nm/s, Nl/min, Nl/s, kg/h, kg/min, ft/min, °C etc. All parameters can be set directly on the device. There are also 2× 4…20 mA analog outputs available for flow and temperature as well as a galvanically isolated pulse output for consumption.
Features
- Also for outdoor use
- Compressed air measurement in hygienically critical areas
- Leakage measurement of compressed air and gases
- Consumption measurement of gases such as nitrogen, argon, carbon dioxide, oxygen, etc.
- Consumption measurement in vacuum systems
- Consumption measurement of explosive gases like natural gas, methane, propane, and hydrogen with ATEX approval
- Measurement of oxygen and natural gas at gas burners
- Ideal for connection to the energy management software Efficio
Technical data
| Measured quantities | 0.1…92.7 Nm/s, standard version*, 0.1…185 Nm/s, max. version*, 0.1…224 Nm/s, high-speed version** * Measuring range Nm³/h for different pipe diameters and gases; see table measuring ranges flow rate in data sheet ** All measured values referred to DIN 1343 standard conditions 0° and 1,013 mbar ex works |
| Accuracy (o. m. = of measured value) (o. f. = of final value) |
±1.5% o. m. ±10.3% o. f. on request: ±1.0% o .m. ±0.3% o. f. |
| Accuracy data | Referred to ambient temperature 22°C ±2°C, system pressure 6 bar |
| Repeatability | 0.25 % o. m. with correct installation (installation aid, position, inlet distance) |
| Measuring principle | Thermal mass flow sensor, the measuring effect is based on cooling of a heated PT 45 sensor by passing gas. The ambient temperature is measured with a PT 100. Further pressure and temperature compensation is not necessary. |
| Response time | t90 < 3 s |
| Operating temperature range | –40…180°C standard version, sensor tube |
| Sensor tube/indicator unit | 0…350°C high-temperature version, sensor tube -40…70°C display unit |
| Setting options via display, PC BMG service software, remote diagnosis |
Nm³/h, Nm³/min, Nl/min, l/s, ft/min, cfm, kg/h, kg/min, inner diameter, reference conditions °C/°F, mbar/hPa, zero-point correction, creep quantity suppression, scaling Analog output 4…20 mA, pulse/alarm, error codes etc. |
| Adjustment possibilities via external device DS 400 |
Gas type |
| Protection class | IP 67 |
| Material | Case die-cast aluminum, sensor tube stainless steel 1.4571, glass |
| Operating pressure | 50 bar; in special version 100 bar, (with DVGW approval max. 16 bar) |
| Power supply | 18…36 V DC, 5 W |
Variants
-
BMG1050 S Item number: 003959 Screw-in thread 1/2 male thread
Sensor length: 160 mm for DN25-DN50
Accuracy: 1,5% of measured value +- 0,3 % from
Max. Pressure: 16 bar
Maximum dimensions: Height 441 mm, width 99.8 mm,depth 156 mm.
Weight: approx. 2,8 kg
Maximum gas temperature: 180°C
Interfaces: 1x Modbus RTU, 1x pulse, 1x analog (4…20mA)
-
BMG1050 M Item number: 003960 Screw-in thread 1/2 male thread
Sensor length: 220 mm for DN65-DN125
Accuracy: 1,5% of measured value +- 0,3 % from
Max. Pressure: 16 bar
Maximum dimensions: Height 441 mm, width 99.8 mm,depth 156 mm.
Weight: approx. 2,8 kg
Maximum gas temperature: 180°C
Interfaces: 1x Modbus RTU, 1x pulse, 1x analog (4…20mA)
-
BMG1050 L Item number: 003961 Screw-in thread 1/2 male thread
Sensor length: 300 mm for DN150-DN300
Accuracy: 1,5% of measured value +- 0,3 % from
Max. Pressure: 16 bar
Maximum dimensions: Height 441 mm, width 99.8 mm,depth 156 mm.
Weight: approx. 3,0 kg
Maximum gas temperature: 180°C
Interfaces: 1x Modbus RTU, 1x pulse, 1x analog (4…20mA)
Calibration, interfaces, and accessories
-
BMG1050/70 GA MIX Item number: 003975 Calibration gas mixture for BMG1050 or BMG1070 consumption and flow sensors. Factory gas calibration to the medium hydrogen (H2)
instead of standard medium (compressed air). Prerequisite is the provision of a
gas analysis before carrying out the calibration. Gas standard: DIN 1343 (0 °C, 1013 hPa)
-
BMG1050/70 GA ECHT Item number: 003980 Real gas calibration (special gases) as part of the initial calibration or recalibration of
BMG1050 or BMG1070 consumption and flow sensors.
The real gas adjustment is required for the test bench for the initial calibration or recalibration
of sensors used to measure the technical gases helium He, hydrogen H2,
Propane C3H8 or gas mixtures.
-
BMG1000/20/50/70 C-POE Item number: 003965 Additional Modbus TCP interface PoE for BMG1000, BMG1020, BMG1050
or BMG1070 consumption and flow sensors.
Interface: 1x Power over Ethernet Interface (Modbus TCP) according to
IEEE 802.3af, PD Class 2 (max. 6.5W)
Voltage: 36V to 57V DC; Connection: M12 connector with X-coding
Note: With TCP version the pulse output and the M-Bus interface are omitted.
-
BMG1000/20/50/70 C-ETH Item number: 003964 Additional Modbus-TCP interface for BMG1000, BMG1020, BMG1050 or
BMG1070 consumption and flow sensors.
New interface: 1x Ethernet interface (Modbus TCP)
Connection: M12 connector with X-coding
Note: For TCP version, the pulse output and the M-Bus interface are omitted.
Consumption Sensor BMG 1070
This consumption and flow sensor with integrated measuring section works according to the calorimetric measuring principle; an additional temperature and pressure compensation is therefore not necessary. In the BMG 1070 version, the sensor is supplied with an integrated measuring section. The measuring sections are optionally available as flange or threaded versions. A special advantage is the ability to unscrew the measuring unit. This allows the measuring unit to be removed quickly and easily for calibration or cleaning purposes. The measuring section is sealed by means of a sealing plug (accessory). The screw fitting with centering device is designed in such a way that the sensor is positioned exactly centrally in the direction of flow when it is screwed into the measuring section. This avoids measured value errors.
Due to the robust design in the aluminum die-cast housing and the robust sensor tip made of stainless steel, the BMG 1070 is suitable for the most demanding industrial applications. The evaluation electronics allows very precise, and fast measurements in a temperature range up to 110°C is possible. The measuring span is 1 to 1000 and thus allows measurements at very low as well as very high flow velocities.
Features
- Standard with Modbus RTU interface and analog or pulse output
- Optional with M-Bus or Modbus TCP interface
- Integrated color display with touch panel
- High measuring accuracy up to 1%
- Impact-resistant aluminum pressure housing
- Protection class IP 67 for outdoor installation
- Template for the energy management software Efficio
Technical data
| Measuring range | Depending on gas type and factory calibration: Calibration options 92.7 m/s (standard), 185 m/s (max.), 224 m/s (high speed), 50 m/s (low speed) |
| Accuracy | ±1.5% of measured value, ±0.3% of final value, optional: ±1.0% of measured value referred to ambient temperature 22°C ±2°C, system pressure 6 bar |
| Measuring principle | Thermal mass flow sensor, the measuring effect is based on the cooling of a heated PT 45 sensor by passing gas. gas. The ambient temperature is measured with a PT 100. Further pressure and temperature compensation is not necessary. |
| Response time | t90 < 3 s |
| Media temperature | –40…110°C at the sensor tube |
| Setting options via display |
Nm³/h, Nm³/min, Nl/min, l/s, ft/min, cfm, kg/h, kg/min, inner diameter, reference conditions °C/°F, mbar/hPa, zero point correction, creep quantity suppression, scaling Analog output 4…20 mA, pulse/alarm, error codes, etc. |
| Setting options Gas type |
Via external handheld terminals DS400/500 or PI500 |
| Protection class | IP 67 |
| Material | Case die-cast aluminum, sensor tube stainless steel 1.4571, glass |
| Operating pressure | 50 bar; in special version 100 bar |
| Power supply | 18…36 V DC, 5 W |
| ATEX approval | On request |
| DVGW approval | On request |
Variants
Calibration, interfaces, and accessories
-
BMG1050/70 GA MIX Item number: 003975 Calibration gas mixture for BMG1050 or BMG1070 consumption and flow sensors. Factory gas calibration to the medium hydrogen (H2)
instead of standard medium (compressed air). Prerequisite is the provision of a
gas analysis before carrying out the calibration. Gas standard: DIN 1343 (0 °C, 1013 hPa)
-
BMG1050/70 GA ECHT Item number: 003980 Real gas calibration (special gases) as part of the initial calibration or recalibration of
BMG1050 or BMG1070 consumption and flow sensors.
The real gas adjustment is required for the test bench for the initial calibration or recalibration
of sensors used to measure the technical gases helium He, hydrogen H2,
Propane C3H8 or gas mixtures.
-
BMG1000/20/50/70 C-POE Item number: 003965 Additional Modbus TCP interface PoE for BMG1000, BMG1020, BMG1050
or BMG1070 consumption and flow sensors.
Interface: 1x Power over Ethernet Interface (Modbus TCP) according to
IEEE 802.3af, PD Class 2 (max. 6.5W)
Voltage: 36V to 57V DC; Connection: M12 connector with X-coding
Note: With TCP version the pulse output and the M-Bus interface are omitted.
-
BMG1000/20/50/70 C-ETH Item number: 003964 Additional Modbus-TCP interface for BMG1000, BMG1020, BMG1050 or
BMG1070 consumption and flow sensors.
New interface: 1x Ethernet interface (Modbus TCP)
Connection: M12 connector with X-coding
Note: For TCP version, the pulse output and the M-Bus interface are omitted.
