Aranet Case Study – Wireless temperature monitoring in Latvia’s largest supermarket chain, Rimi Baltic

Aranet - Wireless Monitoring Solutions

Aranet Case Study – Wireless temperature monitoring in Latvia’s largest supermarket chain, Rimi Baltic

If a refrigeration unit in your supermarket breaks down you don’t have to worry about spoiled products. Provided that you have the Aranet smart sensor system installed, as Rimi Baltic has… Rimi Baltic is a major retail operator in the Baltic states based in Riga, Latvia. It is a subsidiary of the Swedish group ICA. Rimi Baltic operates 83 retail stores in Estonia, 56 in Lithuania and 125 stores in Latvia. They also operate supply-chain distribution centers in each of these countries.

When Aranet representatives first started to investigate supermarkets, it was a surprise for us how often data collection still depended on manual pen and paper recording. Measurements such as freezer temperatures were susceptible to human error and problems could only be detected after the fact.

In the summer of 2018 Rimi Latvia gave Aranet a chance to prove the quality of our wireless sensors for refrigeration unit temperature monitoring.

The superior quality of the Aranet system became apparent – where our competitors needed 3 base stations to cover a large supermarket, Aranet did it with only one. Because of the advanced performance of our technologies Aranet proved itself to be the best solution for Rimi’s needs.

Today 7 000 Aranet wireless sensors are installed in all 125 Rimi supermarkets in Latvia.

If something goes wrong with a refrigeration unit the Aranet system immediately alerts the food safety manager that temperatures are experiencing a variance outside of optimal range so that corrective actions can be taken.

Currently all of the Rimi stores in Latvia access the Aranet Cloud for centralized monitoring and data analytics. No more manual temperature data logging means greatly reducing losses associated with non-saleable products. Automated temperature monitoring and minute-by-minute notifications of variances greatly simplify compliance with the HACCP process.

Even in the largest Rimi supermarket, 8 800 m2 – about the size of a city block, the wireless signal of a single Aranet base station can cover the whole store.

After implementing the Aranet sensor system additional benefits are becoming apparent. Rimi Baltic outsources the operation and maintenance of refrigeration units. With the data provided by Aranet, stores can save on the energy costs of operating the refrigeration equipment by keeping the units running at the optimal temperature range. In accordance with food safety guidelines Rimi must maintain their frozen food inventory at -20°C. By using the Aranet system Rimi learned that the outsourced maintenance company was keeping some of the freezers at temperatures as low as -30°C. The ambient temperature at Rimi supermarkets is usually kept around 20°C. This means that the temperature difference between the freezer and the store temperature was 32°C, when it should have been 22°C. Aranet data analytics identified substantial savings of 20% by reducing energy costs associated with operating these units.

The Aranet system is a plug-and-play solution that allows a supermarket to protect itself from unnecessary food spoilage and potential food safety violations. As an added benefit it allows for an easy record keeping for reporting and traceability.

You can only improve what you measure. Time to choose Aranet!

Smart devices or central portal – HW group follows both trends in IoT sensor technology

HW group - Monitor and Remote Control

Smart devices or central portal – HW group follows both trends in IoT sensor technology

HW group devices follow the two current trends in sensor technology. First, there are simple single-purpose devices with IoT network topology, dependent on a central cloud application for control. Then, there are smart devices for autonomous operation and networks with high security requirements. Each solution has its own advantages. Simple devices offer simple installation, configuration and central maintenance, thus reducing maintenance costs during the entire lifetime.

Advantages and disadvantages of simple vs. smart devices

The question whether it is better to use single-purpose devices or rather to integrate more functions into one device has been debated since the first microprocessors. By using more single-purpose devices, better system scalability can be achieved but possibly at higher costs. By integrating functions, hardware costs can be significantly reduced but there is an increased risk that a fault in one subsystem will make the whole system inoperable.

At the same time, the decision whether to use smart autonomous devices or a cloud-based solution should not be based on the device costs alone; it must reflect the actual application – for what purpose is an independent monitoring solution being implemented – as well as the system design and installation.

Smart devices like HWg Damocles2, Poseidon2, Ares LTE…
HWg SD-Devices
Autonomous operation without a permanent Internet connection
Easy installation by non-qualified personnel
Support for several types of communication protocols, easy integration into monitoring systems
Bidirectional communication works without the need for in-depth network knowledge
Internal logic can perform autonomous actions
Function easily changed using a unified portal
Extended support for M2M communication
Unified communication format
Internal datalog
Very stable operation
More complex system design
Higher system modularity
Installation requires expert personnel
System functionality limited by the portal capabilities
Higher price
Operation dependent on a third-party system

System design and scalability

Simple single-purpose devices offer a clear advantage. They contain a small, clearly-defined number of inputs, outputs and sensors. They do not combine functions within a single package; however, it is easy to combine different devices. This makes it much easier to design the entire ecosystem and also to extend it.

When designing a monitoring solution, it is important to keep in mind not just the function but also the range of monitored elements and quantities. Monitoring can encompass elementary quantities, such as temperature and humidity, and also things such as door contacts, equipment states, voltages or currents. From this point of view, single-purpose devices and smart devices serve equally well. In simpler applications, smart devices have an advantage because an all-in-one solution provides all the necessary elements and functions at low installation costs. So, to monitor the environment inside a rack, all that is needed is a STE2 with a thermometer, a humidity sensor and two door contacts, or a Poseidon2 3268 that can also control additional fans. However, in case of more complex applications, it is harder to keep the costs under control. Smart devices provide a limited number of inputs, outputs and sensors in various combinations; therefore, it is necessary to know all the available models and choose a suitable combination. It can easily happen that a user who needs just 1 additional digital input ends up purchasing an entire additional (and expensive) device.

Installation and configuration

Simple single-purpose devices are all configured at a single place – the central SensDesk portal.

Simple devices themselves do not process data in any way; they just send the data to a remote master system (the portal), where all further processing takes place. This requires highly reliable measurement devices and a robust method of registering them in the system; at the same time, it provides two significant advantages. All configuring and setting up is performed at a single place – in the central SensDesk portal. There is no need to configure each remote device separately, which might require creating tunnels through the Internet to each device. Anyone who has tried to make their data at home accessible over the Internet knows that setting up the required routing at the home gateway (e.g. modem) is not always a straightforward task. And while it is relatively easy to set this up for one device, it can become very complex for multiple devices. Simple single-purpose devices, such as SD-Devices or NB-devices, connect to the server automatically without the need to configure any tunnels.

Smart devices, by their nature, need to be installed by an expert who, in addition to the intended application, also understands computer networks, address translation, and so on. Such people are expensive to hire; moreover, they may not be always qualified and authorized to work on the equipment to be monitored. As a result, the installation may need two people – a technician installing the sensors and an engineer configuring the monitoring device. On top of that, if the installation is done at a customer’s premises, the customer’s IT department may need to be involved, too. If you need to monitor one rack, it is possible to fine-tune the settings and, with the help of the IT team, put in place remote access for possible reconfiguration. A large installation can use a virtual LAN (VLAN) to simplify the situation. However, in case of many devices at different physical locations, the situation becomes complex and the advantages of simple single-purpose devices quickly become an important factor.

Simple single-purpose devices send data actively to a remote server, thus minimizing the risk of problems with the installation.

Smart devices that allow connecting sensors and detectors to buses can save hardware costs but rigorous testing and documentation is needed. Without it, it will be very difficult to troubleshoot e.g. swapped sensors in full operation. Therefore, simple single-purpose devices make things much easier. These devices actively send data to the remote server; instructions for the installation crew can be as simple as “plug the brown sensor into jack 1 and the white sensor to jack 2”, minimizing the risk of errors.

In case of M2M communication, the communication port must always remain open on the target router / firewall, which requires the intervention of a network specialist.

Access to individual devices from the external network (Internet) is also uncomfortable with direct connections, as communication ports need to be open on the destination router / firewall (one port per device), which requires the intervention of a network specialist.

When SensDesk is used as an intermediary, there is a slight slowdown in communication, but there is no need to interfere with the network infrastructure, which increases the security of both the application and the rest of the network.

By using the portal solution for setting up the behavior, Saferange and other target application parameters, the security of not only the application but also of the rest of the network is again increased. This method is very user-friendly, and what is more important, it remains the same across different products.

Changing the device configuration

When it comes to reconfiguring the devices, the differences between simple and smart devices are similar as in the case of installation. The portal solution is simpler and faster to maintain. Moreover, a single experienced engineer can manage even very large systems.

M2M operation

When two devices need to cooperate, the solution must be chosen according to the particular application. Compared to all-in-one solutions, simple devices offer the advantage of easy scalability. However, a direct connection between two devices is always faster and more secure than an intermediate central portal. Due to the architecture of cloud solutions, when an action needs to be performed with an output of a device via the portal, it is necessary to wait until the device connects to the central server; this can take anywhere from tens of seconds to several minutes. On the contrary, Poseidon2 and Damocles2 devices can establish a direct connection between themselves and react within a few hundred milliseconds to a few seconds. However, if the devices are in different networks, such a connection requires special routing configuration; this may take significant effort or, in corporate networks, can be even impossible.

Suitable applications for smart devices

Smart devices, such as Poseidon2, Damocles2 or HWg-PWR, are ideal for use in critical applications where the reaction, such as the sending of a text message or switching an output, must be as fast as possible. These devices also keep track of the real time and maintain a time-stamped data log. Moreover, they support multiple communication protocols, such as SNMP, ModBus/TCP, MQTT and more; however, configuration is required for proper operation. They are, therefore, better suited for industrial applications or closed networks and systems.

Independence of the solution

The need for a truly independent monitoring is the strongest argument for using devices such as Poseidon2, Damocles2 or HWg-WLD (smart devices). These device can autonomously measure the monitored quantities, evaluate the measurements and, if needed, send alerts, turn on a back-up system or switch off the monitored equipment to prevent further damages. The only criterion here is the importance of the application and its purpose. To send e-mail alerts, all that is needed is a working connection to the Internet (a SMTP server); to send text messages, a HWg-SMS-GW3 in the same network can be used (some devices can also interface with a modem).

Any single-purpose device relying on cloud services or another server solution is dependent on Internet access. Such a topology introduces at least one element to the communication chain that the user does not have under control. For this reason, smart devices are better suited for critical applications, or for installations where a company policy prohibits the use of server-based or cloud services.

Suitable applications for single-purpose SD-Devices and NB-Devices

Simple single-purpose devices are primarily intended for larger installations in terms of their geographical scope or the number of sensors.
They are suitable for applications that encompass many small installations spread over multiple locations. They allow connecting a few sensors and detectors and thus enable simple installation. At the same time, they do not require any special configuration, apart from e.g. configuring the Wi-Fi in case of SD-Devices. All subsequent operations are performed in the SensDesk portal only, and can be done by a qualified person. The low per-device cost is an advantage when extending the system; it is sufficient to buy just the inputs or outputs that are needed.

NB-Devices are typically used at remote locations without electricity and internet..

Cooperation between smart and simple devices

Both technologies can be combined within a single solution. The SensDesk portal can be used as the unifying element for both monitoring solutions, combining their advantages. For example, smart devices can be used to measure values and simple devices to control remote outputs or watch for water leaks.

Complete monitoring and alarming system with Sigfox technology by COMET System

Sigfox IoT Sensors

Complete monitoring and alarming system with Sigfox technology by COMET System

Temperature, relative humidity, atmospheric pressure and two-state signals sensors for the Sigfox network.

COMET Sigfox IoT  sensor performs a measurement every 1 minute. The measured values are displayed locally on the LCD and are sent over an adjustable time interval (10 min to 24 hour) via radio transmission in the Sigfox network to the COMET Cloud data store.

For each measured variable, it is possible to set two alarm limits. The alarm is signalled by the symbols on the LCD display and sending an extraordinary radio message to the Sigfox network, where it is forwarded to the end user by e-mail or SMS message.

The device is powered by an internal Li-on battery whose lifetime is dependent on the transmission range and operating temperature and ranges from 4 months to 7 years.

  • Accurate measurement of
    • temperature
    • humidity
    • barometric pressure
    • events
  • Inexpensive wireless communication for long distances
  • Indication of alarm via e-mail or SMS
  • Data storage in the COMET Cloud
  • Rugged design
  • Long battery life up to 7 years (with standard AA batteries and with C batteries up to 10 years)
Complete monitoring and alarming system with Sigfox technology

Advantages of COMET Cloud

  • centralized monitoring, documentation and management of all measured points
  • securing the measured data against unauthorized access from a third party
  • dashboard – comparing of values ​​from up to 4 sensors
  • data presentation in graph and table
  • remote adjustment of sensors
  • signal quality and sensor battery indication
  • well-arranged presentation of larger number of devices, the possibility of grouping into sub-organizations
  • administration of access rights of individual cloud users
  • warning e-mails:
    • when alarm limits are exceeded
    • when the battery power is low
    • when the radio connection is lost
    • in case of measurement failure
    • when the fault condition ends
  • possibility to define recipients of e-mails according to the type of fault (sensor service, service of technology)
  • possibility to define recipients of e-mails according to the level of exceeding the monitored limit
  • user-defined texts for individual warning emails

Aranet PRO – Innovative Environmental Wireless Monitoring Sensors

Aranet - Wireless Monitoring Solutions

Aranet PRO – Innovative Environmental Wireless Monitoring Sensors

Aranet PRO is an industrial grade environmental wireless monitoring solution for a variety of businesses. Aranet PRO comes in three variations

  • Aranet PRO 12 Base Station supports up to 12 wireless sensors,
  • Aranet PRO 50 Base Station supports up to 50 wireless sensors, and
  • Aranet PRO 100 Base Station supports up to 100 wireless sensors.

The base station has exceptional sensitivity and allows placing the wireless sensors within line-of-sight range of at least 3km and inside buildings within range of several hundred meters. Aranet PRO systems come with a free, easy to use software program, Aranet SensorHUB, that helps view, analyse and compare data in real time, set thresholds for alarms, rename sensors, export data to help keep pulse on the ongoing and optimize processes when necessary. Base station is able to store data locally and/or on the Aranet Cloud (cloud service available 1Q/2019). Responsive design of the software adapts to smartphone, tablet or laptop.

The Aranet API software allows integrating the Aranet sensor measurement data into 3rd party applications. The application aranet-agent runs on Windows, Linux or macOS operating systems and acts as data provider between one or several Aranet PRO base stations (collection point of sensor measurements) and 3rd party application.

Aranet PRO Base Stations for Wireless Sensors

Depending on how many sensors are required, the user can choose between three Aranet PRO versions – Aranet PRO 12, Aranet PRO 50 and Aranet PRO 100:

  • Maximum sensor count: 100/50/12
  • Alarm type: Email, optional alarm SMS notification through USB modem
  • Memory: 10+ years with 100 sensors
  • Receiver sensitivity: Europe -127 dBm
  • Channels – Europe: Channel 1: 868.10 MHz, Channel 2: 868.30 MHz, Channel 3: 868.50 MHz
  • User interface: Aranet SensorHUB (Aranet Cloud available 1Q/2019)
  • Interface accessibility: PC, tablet or smart phone connected via Ethernet cable or local WiFi connection
  • Temperature scale: Celsius, Fahrenheit, Kelvin
  • Data resolution: Temperature 0.1°, Humidity 1%
  • Data protection: Password protected user accounts, encryption for data
  • Communication: Ethernet cable, local WiFi (2.4 GHz)
  • Power options: AC Power adapter. Optional power supply with PoE adapter. Built-in battery (backup power up to 30min)

Wireless Sensors with Long Range and Battery Life

Aranet wireless sensors for monitoring temperature, relative humidity, CO2 level, atmospheric pressure, illuminance and distance in different environments. Data transmission between sensors and Aranet PRO base station uses free of charge 868MHz frequency band and line-of-sight range can be up to 3km (inside buildings several hundred meters). Sensors come with Alkaline batteries with max. battery life of 7 years, and optionally available Lithium batteries with max. battery life of 10 years. Battery life depends on measurement interval (can be 1, 2, 5 or 10 minutes) and on monitoring device.

  • Measures: CO2-level 0-9999 ppm, temperature 0°C to +50°C, relative humidity 0% to 85% RH, atmospheric pressure 300-1100 hPa
  • Battery life: Up to 2 years
  • Protection class: IP20
  • Measures: temperature (-40°C to +60 °C)
  • Battery life: up to 7 years
  • Protection class: IP68
  • Measures: temperature (-40°C to +60°C) and relative humidity (0% to 100%)
  • Battery life: up to 10 years
  • Protection class: IP42
  • Measures: temperature (-40°C to +60°C) and relative humidity (0% to 100%)
  • Battery life: up to 10 years
  • Protection class: IP68
  • Measures: temperature (-55°C to +105°C)
  • Battery life: up to 10 years
  • Protection class: IP68
  • Probe length: 0.3m/1m/5m/10m
  • Measures: temperature (-200°C to +800°C)
  • Probe type: Any class PT100
  • Battery life: up to 10 years
  • Protection class: IP68
  • Measures: temperature (-190°C to +260°C)
  • Battery life: up to 10 years
  • Protection class: IP65
  • Measures: distance (0.3m to 5m or 0.5 to 10m)
  • Battery life: up to 7 years
  • Protection class: IP67
  • Measures: illuminance (0 – 200 000 lux)
  • Battery life: up to 7 years
  • Protection class: IP68
  • Measures: current (0-30mA)
  • Battery life: up to 7 years
  • Protection class: IP68
  • Measures: DC voltage (-32 to +32 VDC)
  • Battery life: up to 7 years
  • Protection class: IP68
  • Measures: temperature (-200°C to +800°C)
  • Probe type: Any class PT1000
  • Battery life: up to 10 years
  • Protection class: IP68
  • Measures: carbon dioxide (CO2) (0 ppm – 9999 ppm)
  • Battery life: up to 7 years
  • Protection class: IP40

Aranet Signal Test sensor designed to analyze the signal strength and help IoT system deployers install and plan sensor placements in desired locations.

New Remote Monitoring and Controlling IoT Devices from HW group

HW group - Monitor and Remote Control

New Remote Monitoring and Controlling IoT Devices from HW group

SD devices for remote monitor and control

The SD Devices - IoT monitoring units.

The SD family contains simple devices for monitoring temperature, humidity and other parameters or for detecting water leaks, smoke or open windows and doors. The devices connect via wired Ethernet or wireless WiFi to the SensDesk IoT portal.

Basic features

  • Wired Ethernet as well as WiFi – 802.11 b/g/n (2.4GHz)
  • Support for simultaneous Ethernet and WiFi operation (for easy setup)
  • 5V or PoE power
  • Simple installation, supports DHCP
  • Embedded WEB server
  • Security protected with a password
  • Support for the SensDesk IoT portal to visualize all measured data, send alarms and generate reports

Temperature and humidity monitoring with Ethernet and WiFi

A device for connecting thermometers, hygrometers, or other sensors via the 1-Wire bus. Allows connecting two 1-Wire or 1-Wire UNI sensors.

Digital inputs with Ethernet and WiFi

A device for connecting a door or window contact, a PIR motion detector or a smoke or gas detector, with a dry contact output. Allows connecting 2 independent sensors.

Two digital outputs with Ethernet and WiFi

A device with two outputs that can be controlled from the SensDesk portal.

Water leak detector with Ethernet and WiFi

A water leak detector with a moisture-sensing cable. Allows connecting 1 sensing cable of up to 85m length.

Aranet4 Innovative Wireless Indoor Air Quality Sensor with Display

Aranet - Wireless Monitoring Solutions

Aranet4 Innovative Wireless Indoor Air Quality Sensor with Display

Aranet4 Innovative Wireless Indoor Air Quality Sensor with Display

Several studies have found that one of the main reasons for poor well-being is the high concentration of carbon dioxide (CO2) indoors. It makes people anxious, sleepy and unable to concentrate. The U.S. Environmental Protection Agency (EPA) studies indicate that indoor levels of pollutants may be even five times higher than outdoors. Another study from Harvard University demonstrated that a heightened CO2 concentration reduces the brain’s cognitive abilities by 50%. These are the core abilities your brain uses to think, read, learn, remember, reason, and pay attention. Therefore, it is very important to ensure sufficient air circulation in rooms where people stay for extended periods of time.

The Aranet4 wireless sensor is a simple and exciting way to monitor indoor air quality – it is small, portable, easy to operate and lets you know when the monitored levels have become unhealthy. You can take this fancy gadget wherever you go and always be aware of air quality around you. The device also has a power-efficient e-ink display ensuring extremely long battery life.

Up to 100 Aranet4 sensors per Base Station

Aranet4 PRO is designed for business needs for air monitoring. Up to 100 Aranet4 PRO devices can be placed in multiple rooms and wirelessly connected to an Aranet PRO base station thus ensuring climate monitoring on an industrial level, in schools, hotels and other places.

Aranet4 PRO has also a handy smartphone app created for historical data access, atmospheric pressure monitoring and advanced device configuration.

Aranet PRO base station offers centralized data gathering and real time viewing, as well as unlimited historical information and alert functionality for larger sensor networks. It gathers readings from up to 100 Aranet sensors and can store data locally and on the Aranet Cloud.

Aranet4 PRO Indoor Air Quality Sensor

  • Measurements: CO2 (carbon dioxide), temperature, relative humidity, atmospheric pressure
  • Line of Sight Range: Aranet radio up to 3 km, BLE up to 10m
  • Operating environment: Indoor use
  • Transmitter power: 14 dBm
  • Measurement range:
    • CO2: 0-9999 ppm
    • temperature: 0°C to +50°C
    • relative humidity: 0% to 85% RH
    • atmospheric pressure: 300-1100 hPa
  • Measurement accuracy:
    • CO2 0-2000 ppm: ±50 ppm or 3% of reading and 2001-9999 ppm: ±10% of reading
    • temperature ±0.4°C
    • relative humidity ±3%
    • atmospheric pressure ±1 hPa
  • CO2 sensor: Uses the nondispersive infrared (NDIR) sensor to measure CO2
  • CO2 measure calibration: Automatic or manual (at 400ppm)
  • Data Transmission: 1, 2, 5, 10 minutes
  • Data Protection: Data encryption
  • Power: 2 AA Alkaline batteries (Zn/Mn02)
  • Battery life: Up to 2 years
  • Operating temperature: 0°C to 50°C
  • Operating humidity: 0% to 85% non-condensing
  • Dimensions: 70x70x24 mm
  • Weight: 104g
  • Construction: Polycarbonate
  • Protection class: IP20
  • Marking: CE
  • Compatible base stations: Aranet PRO (from v1.3.2)

Link to product pages: Aranet4