Severn WLD™ Support FAQs
Overview of Severn WLD™ devices
What is Severn WLD™?
Severn WLD is LAIIER’s water leak detection device. The Severn WLD hardware connects to a printed sensor that is split into 12 sections or electrodes. Upon powering up with a single AA Li-SOCl2 cell battery, the device connects to the LoRaWAN® network via OTAA. After running through a self-test, the device enters its run mode.
Within the run mode, the device checks for water on each electrode every minute. It sends a regular or “heartbeat” uplink message by default every 4 hours via LoRaWAN. In its default mode, when it detects the presence of water on 4 or more electrodes, the device sends an emergency uplink message via LoRaWAN.
The threshold, the number of electrode segments that have to be wet to trigger an emergency message, and the regular message time interval can be changed via a LoRaWAN downlink message. The device also reports on its battery status and when its sensor becomes disconnected.
The Severn WLD device also contains a temperature sensor, to report the ambient temperature; and an accelerometer, to report whether the device has been moved.
Is Severn WLD waterproof?
The Severn WLD device has an IP65 rating, making it waterproof.
Does the sensor need to be replaced whenever it detects a leak?
No, once Severn WLD detects a leak, you can wipe the sensor dry and re-use it.
What is the lifetime of Severn WLD?
The device has a 6-year battery life when operating at room temperature, a good distance from a LoRaWAN gateway, and when sending a regular message every 4 hours.
What is the coverage area of Severn WLD?
The sensor is approximately 2 ft 9 ½” / 850mm long. Longer and wider sensors are on our product roadmap.
What certifications does Severn WLD have?
Severn WLD is FCC and ISED certified. It is also CE and UKCA marked. The specific directives that it complies with are:
- FCC
47 CFR Part 15.247 Effective Date 1st October 2020
DSS: Part 15 Spread Spectrum Transmitter - ISED
RSS-247 Issue 2 Feb 20174
RSS-GEN, Issue 5 AMD 2 Feb 2021
Spread Spectrum/Digital Device (902-928 MHz) - CE
Radio Equipment Directive (RED) 2014/53/EU
Low Voltage Directive (LVD) 2014/35/EU - UKCA
UK Radio Equipment Regulations 2017 No.1206
Does the sensor come in different lengths?
We currently offer just one size of sensor, but more lengths are on our product roadmap.
The sensor can be cut so that it can fit in smaller spaces. This reduces the overall number of electrodes, but it doesn’t affect the functionality of Severn WLD.
Installation
Where is best to place the Severn WLD device?
The water leak detection sensor strip is most effective when placed on clean and dry areas that are prone to water leaks or flooding, such as underneath sinks, near water heaters, underneath appliances like washing machines or dishwashers, and underneath pipe connections.
How do I install the water leak detection sensor strip?
Installation is simple and can be done using the adhesive backing on the sensor strip. Clean and dry the surface where you plan to place the strip, peel off the adhesive backing, and firmly press the strip onto the surface. Ensure the entire length of the strip is in contact with the surface to maximize sensitivity.
How long does it take to install the Severn WLD?
Installing Severn WLD is a matter of minutes, no tools or specialist expertise are needed.
Battery & maintenance
How often does the battery need to be changed?
The battery has a lifetime of 6 years when operating at room temperature, a good distance from a LoRaWAN gateway, and when sending a regular message every 4 hours.
What type of battery is in the Severn WLD?
A Severn WLD device uses a lithium chloride AA battery. If you want to replace the battery, we recommend using Saft LS14500 batteries.
How do I replace the battery in my Severn WLD device?
When your device’s battery is running low, you’ll receive an email notification. This gives you plenty of time to replace the battery before the device goes offline. Please note: when the device is offline, it can't send you any leak alerts.
1. Get a new battery
Severn WLD devices require a 3.6V AA Li-SOCl2 cell battery - using the wrong battery will damage the device. We recommend using a Saft LS14500.
If you don’t have a battery, you can request a complimentary replacement from us:
- Request support online
- From the US & Canada, call: +1 720 782 8202
- From the UK & Europe, call: +44 7458 155 581
2. Locate and open the device
Find the Severn WLD device that needs a new battery.
Open the device by twisting the dial on the enclosure counter-clockwise towards the unlock symbol, and opening the hinged lid.
3. Replace the old battery
Take out the existing battery and insert the new one.
4. Wait for the light to turn green
After inserting the battery, the device will go through a start-up cycle. This will take a couple of minutes, and the small LED will flash different colors during this time.
Once the device has gone through the start-up cycle, the LED will stay one of three colors:
- Green: meaning the device is online and operational.
- Red: meaning the sensor isn't connected correctly. To reconnect the sensor, please read these instructions.
- Yellow: meaning there is water or residue on the sensor. You can fix this by going over the sensor with a damp cloth.
5. Close the device
Once the light is green, close the enclosure lid and lock the device by twisting the dial clockwise, so that the arrow points to the lock symbol.
6. Confirm the battery change is complete
Log into your LAIIER dashboard, and check that the device registers as being online, and has a healthy battery level.
What should I do if my Severn WLD device goes offline?
If your device goes offline, you’ll receive an email notification after 24 hours. Please note: when the device is offline, it can't send you any leak alerts.
1. Confirm the device status
Log into your LAIIER Cloud dashboard, then find the device. Check that it's still showing that it's offline.
2. Understand why the device might be offline
There are two common reasons:
- The device has run out of power.
- The device has lost connection to the gateway.
3. Check if the device has run out of power
In the dashboard, check the device's battery indicator for the device.
If the battery status is showing red, the battery needs to be replaced. (Please see our battery replacement guide.)
4. Check the network connection
If the battery is healthy, the issue is likely the network connection:
- Make sure your gateway is online and working properly. If you're unsure, please contact us.
- Check the signal strength of the device in the dashboard. If it’s showing red, the signal is too weak. If this is the case:
- Try adjusting the gateway antenna by bending it by 90 degrees.
- If possible, move the gateway closer to the device.
5. Confirm that the issue is resolved
Wait an hour and then check the LAIIER Cloud dashboard to see if the device is back online.
If the device still hasn't reconnected, please reach out to us. We are happy to work with you to troubleshoot the problem, and may recommend adding more gateways or replacing faulty ones.
- Request support online
- From the US & Canada, call: +1 720 782 8202
- From the UK & Europe, call: +44 7458 155 581
Messages
How often does the Severn WLD check for water / send a message?
The Severn WLD device checks for water every minute and sends a "heartbeat" message every 4 hours.
It immediately sends an emergency message via email and/or text upon detecting water and follows up with a confirmed emergency message, requiring confirmation from the gateway. If confirmation isn't received, it retries.
Upon drying, it sends a confirmed regular message. At least 3 confirmed heartbeat messages are sent within 24 hours. Messages beyond 3 aren't confirmed, risking unseen transmission issues.
What kind of messages does the Severn WLD device send?
The Severn WLD device sends four message types: startup, self-test, regular, and emergency:
- Startup messages provide firmware version and device serial number.
- Self-test messages indicate sensor and device status upon startup or magnet swipe.
- Regular messages and the “heartbeat” message sent every 4 hours, indicate sensor and device status.
- Emergency messages are sent immediately and alert water detection. These are sent based on the threshold set for how many electrodes need to be wet before triggering an emergency message.
Both regular and emergency messages convey electrode status and device health. Both these messages send information on the state of each electrode and the overall health of the device.
Only emergency messages are sent immediately when water is detected and as default if 4 electrodes are wet. Therefore, 3 or fewer electrodes have become wet, this will be communicated in a regular message every 4 hours.
What is the difference between a confirmed and unconfirmed message?
Most messages are unconfirmed as these use less power, but there is no guarantee that they will be received by the network as long as the signal strength of the device is strong these should be received in most cases.
Confirmed messages use more power, but are more likely to be received by the network as a message is sent back to the device in response. A limited number of confirmed messages can be sent each day as outlined in the LoRaWAN protocol.
My device isn’t sending messages anymore / doesn’t connect to the LoRaWAN gateway. What should I do?
If your Severn WLD isn’t sending messages anymore or can’t connect to the LoRaWAN gateway, please look at the device’s LED. If the LED isn’t flashing, do a self-test of the device by swiping a magnet along it.
Check the signal strength in the dashboard for the last time the Severn WLD connected. If it has a low signal strength it may be too far from the gateway and therefore struggling to connect.
What happens to the Severn WLD when my gateway loses connection or power or there are communications issues?
The Severn WLD sends messages at least 3 times a day, where it expects a response from the gateway. If it doesn’t get that response because of potential communication issues, then it will change its communication settings and send the message again until it can successfully send the message and receive the confirmation.
If it is unable to send a message but has tried all communication methods, then it will enter a sleep state and only attempt to send a message every couple of hours. This is to preserve its battery life.
How long does it take for a downlink to update a Severn WLD?
A Severn WLD can only receive a downlink when it sends an uplink message, whether it's an emergency, regular, or self-test message. After sending a downlink, you must wait for the device to transmit an uplink message before the new settings take effect. The updated settings will then appear in the subsequent message.
Sensor tape
Does the sensor of the Severn WLD need to be replaced before it can be used again?
No, the Severn WLD sensor can be simply dried by wiping the water off its surface and then it can be reused.
How do I remove an installed Severn WLD?
If you want to remove an attached Severn WLD, we advise either twisting the entire enclosure while closed until the adhesive loosens, or prising off the surface with a small flat head screwdriver. The adhesive on the device is quite strong, so be careful not to damage the surface it is stuck on.
Why is the sensor still reading as positive even though there is no water on the sensor?
When the sensor indicates that an electrode is still wet even though you can’t see any water on it, then this might be due to residue left behind as the water has dried. In this scenario, please clean the sensor with a damp cloth to remove any residue.
Can I trim the sensor tape?
Yes, you can trim the sensor tape to better fit in tight spaces. However, please be aware that the Severn WLD cannot detect if a sensor has been trimmed, and if the trimmed section is exposed to water, it will still register those electrodes as wet. To prevent this, we recommend either sealing the end of the sensor or adjusting the emergency threshold.
How do I reconnect a sensor that has been disconnected?
If the sensor strip becomes disconnected from the device, you will receive an email notification. Please note: when the sensor is disconnected, it can't send you leak alerts.
1. Locate the device
Find the location of the device that triggered the disconnection alert.
Remove the device and the sensor from its location so that you can work with it - it will likely be stuck down on a surface.
2. Open the device and remove the sensor tape
- Open the device by twisting the dial on the enclosure counter-clockwise, towards the unlock symbol. Then open the hinged lid.
- Remove the battery to turn the device off.
- Open the beige colored connector at the front of the device by lifting the black lever upwards. Now the sensor tape can be removed.
- Re-insert the sensor with the print facing upwards, then close the connector.
3. Wait for the light to turn green
Re-insert the battery, and wait while the device goes through a start-up cycle. This will take a couple of minutes, and the small LED will flash different colors during this time.
Once the device has gone through the start-up cycle, the LED will stay one of three colors:
- Green: meaning the device is online and operational.
- Red: meaning the sensor isn't connected correctly. To reconnect the sensor, please repeat this process.
- Yellow: meaning there is water or residue on the sensor. You can fix this by going over the sensor with a damp cloth.
4. Close the device
Once the light is green, close the enclosure lid and lock the device by twisting the dial clockwise, so that the arrow points to the lock symbol.
6. Confirm connection in the dashboard
Log into your LAIIER dashboard, and check that the device shows that the sensor is connected.
Customer support & training
What should I do if I need additional training or guidance on using the water leak detection sensor?
If you require additional training or guidance, your dedicated Customer Success Manager (CSM) is here to help! Please reach out directly via phone or email to set up a time for personalized support and training sessions tailored to your needs.
How can I schedule a training session with my Customer Success Manager?
Scheduling a training session with your Customer Success Manager is easy - just send them an email, and they'll coordinate a convenient time for the session based on your availability.
What types of training and guidance does the Customer Success Manager provide?
We offer a range of training and support services to help you maximize the value of your investment. This includes onboarding assistance, product demonstrations, troubleshooting support, and best practice recommendations tailored to your specific requirements.
What should I do if I encounter technical issues?
If you encounter any technical issues, please contact our Customer Support team immediately. Our dedicated support staff will work swiftly to diagnose and resolve the issue, ensuring minimal disruption to your protection and peace of mind.
How can I provide feedback or suggestions for improving the water leak detection sensor tape?
We value your feedback and suggestions for improving our products and services. You can provide feedback in this dedicated form, or share feedback directly with your Customer Success Manager, who will ensure it is communicated to the relevant teams for consideration. We appreciate your input - it's essential in helping us continuously enhance our offerings to better meet your needs!