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iQunet > FAQ


How many wireless sensors can the iQunet sensor network manage?

Virtually unlimited. There is no limit on the number of sensors in one iQunet sensor network. You can also combine different sensor types in one network. The central node is the Base Station. All data gathered by the sensors is stored in the iQunet server attached to the Base Station.

What is the range of a wireless iQunet senor ?

The range of a sensor is a few hundreds of meters in free field. In Industrial plants the range is less due to interference and reflections. If the sensor is mounted according our instruction you can reach up to 50m in a rather open plant. In a very dense plant with metal constructions all over, the range will be up to 30m. If a sensor or the Base Station is put in a metal cabinet the range will drop to less 10m. You can always check the RSSI symbol in the dashboard to find out if the sensor is able to connect to the Base Station. Due to limitations in the free frequency bands, we are not allowed by governmental rules to increase broadcasting power – although we could do.





Can I extend the range of the sensor network?

Yes you can! Use an iQunet Repeater to extend the range of the sensor network. You can add an unlimited number of Repeaters in the range of the Base Station.  Each Repeater can serve also an unlimited number of sensors.  Nevertheless, each sensor might not see more than one Repeater between Sensor and Base Station. More Repeater hops in the network will drastically increase the uptime of the radio transmitters in the sensors. By avoiding this, we can guarantee a long battery life.

What is the battery life time of the 2 batteries in the sensors ?

This depends on the adjustable settings made on the sensor via the Sensor Dashboard. But as a comparison : the batteries of the vibration sensor, measuring 8192 vibration points every day, will last up to 5 years. With one important remark: as long as the batteries are clean installed! The sensor electronics are extremely low power. E..g. touching the CR2032 coin cell batteries will leave some grease on the batteries and this will allow to run leak current over the battery poles, resulting in a reduced sensor life time up to 50% !

It is possible to attach a magnetic base to the wireless sensor without interfering the wireless signal quality?

Yes you can. Sensors like the standard Vibration Sensor are not sensitive to magnets. This allows you to mount the sensor on a magnetic base and start online measuring in no time. Other sensors like a the Proximity Sensors measure the magnetic field, and it is obvious that mounting such a sensor on a magnetic base makes little sense.

I am making a test with the Vibration Sensor, and I am observing that I measure 1gRMS when the sensor is measuring nothing ( I only put it on the table). Why is this happening?

The Vibration Sensor contains an acceleration MEMS chip. Even when on the table, the sensor measures gravity. Depending how it lays on the table you will find +1g or -1g on the axis that is in line with gravity. You can set the high pass filter in the Sensor Dashboard to filter out the gravity measurement in the graphs.

How can I avoid to take measurements with the vibration sensor when the rotating equipment is not rotating ?

You can set a threshold level for the Vibration Sensor which avoids creating not usable data. When the measured RMS on a few samples is higher than the threshold, the full measurement is processed and stored in the OPC database. Otherwise this sample measurement is dropped.

Can I monitor already installed analog sensors with the iQunet sensor network?

We are working on a system which digitalize analog sensor values and store them in the OPC database with a time stamp. This way you will be able to combine existing monitoring sensors and wireless iQunet sensors and store the values in one data base for further processing.  We keep you updated via our website.

Do I have to install software and buy licenses to setup and monitor the sensor network?

No, you don’t need to install any software but your browser to address the iQunet sensor dashboard.  Neither is there any license fee to be paid. By purchasing the product, you have paid for both the hardware and installed software. We advise a Chrome browser, but any browser webRTC ready will do fine. (check http://iswebrtcreadyyet.com/legacy.html if your browser support this open source development).  Try the to browse the dashboard on a WebRTC ready browser on any device like your smartphone, tablet, etc.  It will work fine too.

Where is my data stored; do I have to pay a cloud fee ?

The sensor measurements are stored on iQunet Unix Server you buy with the sensors and network components. This server runs several processes and contains a database. (We compute “in the edge – not in the cloud”) The OPC UA server allows you to access the data free of charge from any OPC UA client. There is no lock-in , nor are there any fees to be paid. It is the vision of iQunet that data collected by the customer belongs to the customer without fees. Of course, you will need stable network access to address the server and to visualize the data or to extract data using the OPC UA server communication.

What happens if the internet or intranet fails ?

As long the servers (and repeaters) are connected to the mains, data collection and monitoring remains ongoing, even without internet/intranet connection. The iQunet sensor network stays up and running because we compute “in the edge”, not in the cloud. Data is stored nearby the sensor network. Only visualization (via browser) is done over the network.

Do you have a temperature sensor ?

All battery operated sensors have a temperature sensor chip on board. This electronic sensor is situated on the PCB inside the sensor unit and measures the mass temperature from the wireless sensor. There will be some delay between the surface temperature of the sensor unit and the collected inside temperature.

What means the message in my browser : Error: Could not connect to peer server xxxxxxx

This message will appear if your browser is not able to connect with the iQunet server via internet. Most likely, the network connection from the server is broken. In rare cases the company firewall setting will have to allow our relay server to connect to the iQunet Unix Server within the company network. Please contact us for further instructions.

What is the IP address of the iQunet Unix Server in my network ?

The current IP address from the server in the network can easily been shown : click the 3 bars below the iQunet logo in the browser. The left pane opens. Click “Ethernet-Wifi” and the information appears.

I would like to give a fixed IP address to the iQunet server. Is this possible?

Yes, indeed. Connect to the iQunet Server. Open the left pane in the iQunet dashboard by clicking the 3 bars below the iQunet logo. Click “Ethernet-Wifi” and change the setting from layer 3 in the network profile.