Pulse Input S0 to NB‑IoT with ATEX

Our ACR-EX pulse input to the NB-IoT converter with the ATEX certification option is designed for efficient readings of gas meters with a pulse output. It enables the integration of gas meters—typically for the medium consumption—into the NB-IoT wireless network. The device is synchronized with the network time and reads precisely at hourly intervals with the detection of minimum and maximum flow.

Thanks to the option of local configuration via an optical head using the IEC 62056-21 protocol or the remote configuration over the network, it significantly reduces the total cost of ownership (TCO) in projects requiring frequent remote gas meter readings.

How Does it Work?
NB-IoT connectivity – today, the  Narrowband IoT coverage is available almost everywhere, with a reach even in hard-to-access areas. Additionally, SIM cards can be obtained for as little as 1 EUR per year.
The antenna connector for the wM-Bus reception is designed to minimize losses, ensuring the highest possible reception sensitivity. As a result, we can cover up to 6 floors, depending on the type of building.
The internal NB-IoT antenna provides sufficient coverage and eliminates the need for two external antennas, preventing the possibility of them being swapped during the installation.
Thanks to the standard SMA connector, you can use a cable to extend the antenna from the hard-to-reach places.
A big battery designed  to last over 10 years with the daily readings from Monday to Friday.
Waterproof casing (IP67) for the outdoor installations – for example, even on the street lighting in the middle of a housing estate.
During the manufacturing, we insert your SIM card, connect the battery and upload your configuration. This way, you don't need to spend extra time on the device and it can go directly to the installation.
Screws that won't fall out of the cover during installation make the assembly easier and ensure that the IP rating of the converter is not compromised.
How Does it Work?
NB-IoT connectivity – now offers coverage almost everywhere, reaching even into basements and SIM cards can be obtained for as little as 1 EUR per year.
The antenna connector is designed to minimize losses, ensuring the highest possible reception sensitivity. This allows you to use the device inside a heat exchange station while still maintaining a strong signal.
WAGO connector – the industry-standard terminal block for a quick and secure connections. It shortens the installation time and helps to eliminate mistakes caused by the insufficient wire tightening in the terminal block.
Thanks to the standard SMA connector, you can use a cable to extend the antenna from the hard-to-reach places.
For the installations without an electrical power supply, the converter is available in a battery-powered version, ensuring a long battery life even with the frequent data readings.
IP67 waterproof enclosure for the outdoor installations – ideal for the mounting on the wall of a heat exchange station.
Support for up to 16 connected devices, providing maximum installation flexibility and ensuring that you won't need to return for a second device if there's one more meter than expected.
Screws that won't fall out of the cover during installation make the assembly easier and ensure that the IP rating of the converter is not compromised.
The converter, with a support for the M-Bus standard, is compatible with various meters from different manufacturers, ensuring the versatility and the easy integration.
Data filtering at the hardware level using the VIF and the DIF values for the efficient shortening of the M-Bus message. The message remains standardized and can be processed by any M-Bus parser.
For the demanding applications, a version with an external power is available, providing the continuous power supply to the M-Bus.
How Does it Work?
Data filtering at the hardware level using the VIF and the DIF values for efficient shortening of the M-Bus message. The message remains standardized and can be processed by any M-Bus parser.
The antenna connector is designed to minimize losses, ensuring the highest possible reception sensitivity. This allows you to use the device inside a heat exchange station while still maintaining a strong signal.
WAGO connector – the industry-standard terminal block for a quick and secure connections. It shortens the installation time and helps to eliminate mistakes caused by the insufficient wire tightening in the terminal block.
Thanks to the standard SMA connector, you can use a cable to extend the antenna from the hard-to-reach places.
Communication tested within the largest LoRaWAN networks in Europe as well as in the isolated systems.
For the installations without an electrical power supply, the converter is available in a battery-powered version, ensuring a long battery life even with the frequent data readings.
IP67 waterproof enclosure for the outdoor installations – ideal for the mounting on the wall of a heat exchange station.
Support for up to 16 connected devices, providing maximum installation flexibility and ensuring that you won't need to return for a second device if there's one more meter than expected.
Screws that won't fall out of the cover during installation make the assembly easier and ensure that the IP rating of the converter is not compromised.
The converter, with a support for the M-Bus standard, is compatible with various meters from different manufacturers, ensuring the versatility and the easy integration.
For the demanding applications, a version with an external power supply is available, that enables the continuous M-Bus power supply.
How Does it Work?
The antenna connector is designed to minimize losses, ensuring the highest possible reception sensitivity. This allows you to use the device inside a heat exchange station while still maintaining a strong signal.
WAGO connector – the industry-standard terminal block for a quick and secure connections. It shortens the installation time and helps to eliminate mistakes caused by the insufficient wire tightening in the terminal block.
Thanks to the standard SMA connector, you can use a cable to extend the antenna from the hard-to-reach places.
Communication tested within the largest LoRaWAN networks in Europe as well as in the isolated systems.
For the installations without an electrical power supply, the converter is available in a battery-powered version, ensuring a long battery life even with the frequent data readings.
IP67 waterproof enclosure for the outdoor installations – ideal for the mounting on the wall of a heat exchange station.
The converter is compatible with  various protocols, including Modbus RTU, Modbus ASCII, IEC 62052 and DLMS.
Screws that won't fall out of the cover during installation make the assembly easier and ensure that the IP rating of the converter is not compromised.
Support for up to 128 connected devices, providing the maximum flexibility during the installation and ensuring that you won’t need to return for a second device if there's one more meter than expected.
For the demanding applications, a version with an external power supply is available, allowing the continuous power supply to the sensors.
How Does it Work?
The antenna connector is designed to minimize losses, ensuring the highest possible reception sensitivity. This allows you to use the device inside a heat exchange station while still maintaining a strong signal.
WAGO connector – the industry-standard terminal block for a quick and secure connections. It shortens the installation time and helps to eliminate mistakes caused by the insufficient wire tightening in the terminal block.
Thanks to the standard SMA connector, you can use a cable to extend the antenna from the hard-to-reach places.
NB-IoT connectivity – now offers coverage almost everywhere, including the underground levels and SIM cards can be obtained for as little as 1 EUR per year.
For the installations without an electrical power supply, the converter is available in a battery-powered version, ensuring a long battery life even with the frequent data readings.
IP67 waterproof enclosure for the outdoor installations – ideal for the mounting on the wall of a heat exchange station.
The converter is compatible with  various protocols, including Modbus RTU, Modbus ASCII, IEC 62052 and DLMS.
Screws that won't fall out of the cover during installation make the assembly easier and ensure that the IP rating of the converter is not compromised.
Support for up to 128 connected devices, providing the maximum flexibility during the installation and ensuring that you won’t need to return for a second device if there's one more meter than expected.
For the demanding applications, a version with an external power is available, allowing the continuous power supply to the external sensors.
How Does it Work?
The antenna connector is designed to minimize losses, ensuring the highest possible reception sensitivity. This allows you to use the device inside a heat exchange station while still maintaining a strong signal.
Support for up to 4 connected devices, providing the maximum flexibility during the installation. This ensures that you won’t need to return for an additional device if there’s one more meter than expected during the installation.
Thanks to the standard SMA connector, you can use a cable to extend the antenna from the hard-to-reach places.
Communication tested within the largest LoRaWAN networks in Europe as well as in the isolated systems.
Two-piece EUROCLAMP connector – an industry-standard two-piece terminal block for  quick and secure connections. The advantage of the two-piece terminal block is the ability to prepare the meter connections in advance and then simply attach the terminal block to the PCB.
A big battery with a lifespan of over 10 years, considering the frequency of readings.
IP67 waterproof enclosure for the outdoor installations – ideal for the mounting on the wall of a heat exchange station.
The converter, with its wide input tolerance, is compatible with various meters from different manufacturers, ensuring the versatility and an easy integration.
Screws that won't fall out of the cover during installation make the assembly easier and ensure that the IP rating of the converter is not compromised.
Storing the historical readings and repeatedly sending them in each message to ensure the data recovery even if one or two messages are lost.
For the installations without an electrical power supply, the converter is available in a battery-powered version, ensuring long battery life even with the frequent data readings. For the demanding applications, a version with an external power is available.
How Does it Work?
NB-IoT connectivity – these days, it already has a coverage almost everywhere, with the ability to reach even  the basements.  SIM cards can be obtained for as little as 1 EUR per year.
Support for up to 4 connected devices, providing the maximum flexibility during the installation. This ensures that you won’t need to return for an additional device if there’s one more meter than expected during the installation.
Two-piece EUROCLAMP connector – an industry-standard two-piece terminal block for  quick and secure connections. The advantage of the two-piece terminal block is the ability to prepare the meter connections in advance and then simply attach the terminal block to the PCB.
The antenna connector is designed to minimize losses, ensuring the highest possible reception sensitivity.
The device can be used inside a heat exchange station and despite the high-temperature environment, it provides a stable signal. Thanks to the standard SMA connector, you can use a cable to extend the converter from the hard-to-reach places.
A large battery with a lifespan of over 10 years, taking into account the frequency of readings.
Waterproof enclosure (IP67) for the outdoor installations – ideal for mounting on the wall of a water meter shaft.
The converter, with its wide input tolerance, is compatible with various meters from different manufacturers, ensuring the versatility and an easy integration.
Screws that won't fall out of the cover during installation make the assembly easier and ensure that the IP rating of the converter is not compromised.
Storing the historical readings and repeatedly sending them in each message to ensure the data recovery even if one or two messages are lost.
For the installations without an electrical power supply, the converter is available in a battery-powered version, ensuring long battery life even with the frequent data readings. For the demanding applications, a version with an external power is available.
How Does it Work?
An internal antenna for the ATEX certification compatibility and to accelerate the installation process.
A display on the device for the immediate viewing of the reading, time and the unique gas meter ID, configurable by the user.
A user-replaceable battery with a lifespan of over 10 years, considering the frequency of readings.
WAGO connector – the industry-standard terminal block for quick and secure connections. It shortens the installation time and helps to eliminate mistakes caused by the insufficient wire tightening in the terminal block.
NB-IoT connectivity – now has the coverage almost everywhere, reaching even to the basement levels and SIM cards can be obtained for as little as 1 EUR per year.
Interface for an optical head and configuration through the IEC 62056-21 interface – an industry standard used in the gas meters. This standard allows you to integrate the device directly into your configuration software.
Waterproof enclosure (IP67) for the outdoor installations.
Screws that won't fall out of the cover during installation make the assembly easier and ensure that the IP rating of the converter is not compromised.
Interface for the optical head and configuration via IEC 62056-21 interface - industry standard used in gas meters. This standard allows you to integrate the device directly into your configuration software.
Storage of the historical readings for up to 40 days with the option for the local or remote retrieval.
Why Choose the ACRIOS Systems Converters?
Cyber Resilience Act
We have a full control over each part of the code in our devices. The hardware we produce can be maintained even many years after installation.
Manufactured in the EU
Our converters are manufactured in the Czech Republic with Czech subcontractors. Each unit undergoes final testing while focusing on the functionality of individual communication interfaces and device power consumption.
Total Cost of Ownership
We pay close attention to the TCO - from using a coulomb counter to obtain an accurate battery life to the pre-configured units delivery with your settings.
Easy Set-up
Local configuration via the IEC interface with the option of remote configuration or FUOTA over the NB-IoT network.
With Your SIM Cards
We prioritize privacy and data security—use your own SIM cards and keep sensitive data to yourself. Our part of the puzzle is the hardware and we’re happy to assist with everything else.
Technical Support
Good technical documentation is the foundation of quick integration. On our Wiki, you'll find integration manuals, communication protocol descriptions and videos explaining the usage.
In Compliance with the EU Requirements
The ATEX certification allows the connection of gas meters even in the EX zone 2. What a necessity for the gas industry.
We have a full control over each part of the code in our devices. The hardware we produce can be maintained even many years after installation.
Our converters are manufactured in the Czech Republic with Czech subcontractors. Each unit undergoes final testing while focusing on the functionality of individual communication interfaces and device power consumption.
We pay close attention to the TCO - from using a coulomb counter to obtain an accurate battery life to the pre-configured units delivery with your settings.
Local configuration via the IEC interface with the option of remote configuration or FUOTA over the NB-IoT network.
We prioritize privacy and data security—use your own SIM cards and keep sensitive data to yourself. Our part of the puzzle is the hardware and we’re happy to assist with everything else.
Good technical documentation is the foundation of quick integration. On our Wiki, you'll find integration manuals, communication protocol descriptions and videos explaining the usage.
The ATEX certification allows the connection of gas meters even in the EX zone 2. What a necessity for the gas industry.
What Obstacles Might You Encounter?
Today, most gas meters are already equipped with the communication module, so retrofitting them doesn't make sense. However, an exception may be gas meters for the so-called medium consumption, where equipping them with an external radio module is a more of an economical choice. With this technology, you have probably encountered the following situations as well.
Possible Issues:
  • Requirement for the ATEX certification
  • Need to connect several types of gas meters via the pulse input
  • Need for a device with a display to show the unique gas meter ID, time and currentreading for a quick on-site verification
  • Requirement for an IEC configuration interface for an integration into yourconfiguration software and setting via an optical head
  • Requirement for manufacturing in the EU to comply with the Cyber Resilience Act(CRA)
  • Requirement to purchase only the hardware, without the need to use themanufacturer’s middleware or any connectivity
  • Need to obtain technical documentation for integration into the gas company'sinformation system
  • Support for various communication protocols, such as LWM2M
  • Requirement for the specific configuration to send the counter value at an interval ofexactly one hour and 1 second along with minimum and maximum flow rates
  • Need for a module with a lifespan of at least 10 years
  • Requirement to store historical readings for 40 days with the ability to read themlocally or via the network
  • Need to set the meter counter in the converter so that the value is reported over thenetwork
Our Solution

We have addressed all of these issues. For the gas industry, we have developed a product with the ATEX certification, NB-IoT configuration with over 10 years of battery life, LWM2M protocol support and the IEC configuration protocol integration.

For all of the NB-IoT devices, we can perform the firmware updates remotely via the NBIoT network, so the customer doesn't need to make any changes to the set-up. We are experienced in conducting projects for small businesses as well as large heating plants aimed to optimize the distribution system and to perform readings in compliance with EED and theESG regulations.

Technical Specifications

• 24 readings in 24 hours with a transmission period once a day or customizable settings

• Storage of historical readings for 40 days with the ability for local or remote retrieval

• Detection of minimum and maximum flow rates

• Coulomb counter for an accurate measurement of consumption and information on remaining battery life

• User-replaceable battery

• NB-IoT (Narrow Band IoT) communication with the ability to use any NB-IoT SIM card

• Default plug & play configuration

• User-adjustable gas meter ID with the display visibility

• Remote configuration and firmware updates via the NB-IoT network

• Support for the LWM2M connector

  • Dimensions: 145 x 65 x 40 mm
  • Weight: 226g with battery
  • IP Rating: IP67
  • Transmitter Power Supply: C-Cell battery 8500 mAh
  • Input Parameters: Minimum pulse length: 50 ms, Maximum input voltage: 24V, Maximum sampling frequency: 20Hz, Open contact resistance: >200MOhm, Closed contact resistance: < 100kOhm, ESD: 16kV
  • Maximum Number of Devices:1
  • Features: S0 readings on the LCD display, network time synchronization, pulse counter setting, historic values, detection of min and max flow, hourly values for past 40 days, network failure recovery mechanism
  • NB-IoT: 3GPP rel. v.14
  • Configuration Interface: IEC 62056-21 via optical head
  • Honeywell BK-Gxx
  • Elster BK-Gxx
  • Intergaz BK-Gxx
  • Itron RF1
  • Apator UG
  • Metrix UG
  • Zenner G6
  • Actaris/Schlumberger G10
  • Diehl G10
  • tron G10
  • Itron Gallus 2000 G4
  • Landis+Gyr G6
  • Sensus (Rockwell) G10
  • ACR-EX-100NILCD-I1-C / S0 input to NB-IoT battery powered
  • ACR-EX-100NILCD-I1-C ATEX* / S0 input to NB-IoT battery powered with ATEX

*Under MOQ

  • 1x S0 input to NB-IoT battery powered
  • 1x Installation manual
  • 1x Battery
  • Selected Projects
    I will be happy to discuss everything with you.
    Lukáš Smetana
    CSO
    Thank you for your inquiry. We will address it as soon as possible.
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    ACRIOS’ reliable products for remote readings and innovative, fully customizable solutions perfectly complement our expertise in value-added distribution of IoT products and solutions. We are proud to collaborate with a company that shares our commitment to excellence and customer satisfaction.

    Ivana Janković Šafarić, CEO

    “We were searching for a way that would allow us to connect existing M-Bus and MODBUS meters to our LoRaWAN network and found the solution provided by ACRIOS valuable for these use cases.“

    Martin Brunner, Head of Supply Chain at Netmore

    We offer the ACRIOS remote reading solutions to all of our customers who want to comply with the EED decree. The solution is quick to install, requires no training and proves to be stable over time.

    Jaroslav Brzokoupil, CEO

    ACRIOS was instrumental in our success on a large-scale European deployment of the wM-Bus concentrators, helped to solve all of the technical challenges and deliver results within the set deadlines.

    Lukas Mickus, Project manager

    We successfully integrated the ACRIOS Data Concentrator into our smart metering project, seamlessly connecting hundreds of meters. The device’s performance and stability have been outstanding, even in challenging environments. The LoRaWAN protocol used by the concentrator ensures strong, reliable signal coverage, even in hard-to-reach areas. We highly recommend the ACRIOS Data Concentrator to anyone looking to enhance their smart metering infrastructure.

    Iván Martín Díez, Technical Project Manager

    "The remote gas meter reading devices from ACRIOS have proven their reliability and quality of workmanship. We appreciate that all our technical requirements were met and that we received all the necessary documentation and technical support for integration into our information system. We are very satisfied with the cooperation..“

    Michal Volný, Head of Technical Services

    “The ACRIOS scripting capabilities have provided Netmore with the required solution for solving integrations with MBUS/MODBUS units.”

    Jimmy Björklund, Lead Solution Architect at Netmore