No online Cloud Connector nearby

The sensor can only send data to the cloud if a nearby online Cloud Connector exists.

Service disruption

Cloud service disruptions can impact sensor connectivity.

Temperature outside the operating range

Sensors may stop reporting data if the temperature is outside the range of -40°C to 85°C (-40°F to 185°F).

Exposure to magnetism

Magnetic fields can drain the battery and cause unresponsiveness for the sensor.

Mechanical damage

The sensor is sealed and robust, but impacts can damage it.

Water penetration

The sensor is waterproof (IP68), but prolonged exposure to water/condensation may shorten its lifespan, especially in high temperatures.

The sensor is placed on metal

The sensor has a small antenna that will be affected if the sensor is placed on a metal surface.

Depleted battery

The sensor needs a working battery to measure temperature and send radio messages. 

Regional product incompatibility

DT devices have two versions: EU and US that use different radio frequencies.

Cloud Connector is out of range

The sensor can only send data robustly to the cloud if a nearby online Cloud Connector exists. Otherwise, it will enter Boost mode (boost icon) or sporadically go offline.

• Install Cloud Connector near the sensor according to best practices
• Conduct Cloud Connector (2nd Gen) troubleshooting

Environmental challenges

The sensor's placement affects signal strength. Metal or glass doors, as well as enclosed spaces with thick walls can weaken connectivity.

• Check the sensor's location and reposition it if needed for better signal. Range Extenders placed directly on a metal surface will not improve the connection. Try repositioning the Cloud Connector closer to the sensors, ensuring a stronger and more stable connection.
• Look for changes like moved Cloud Connectors, new walls, or other obstacles affecting radio communication.

Electromagnetic interference

Strong electromagnetic interference may inhibit radio reception in the sensor or the Cloud Connector, causing intermittent communication loss even with a strong connectivity indication.

• Move the Cloud Connector and/or the sensor away from the source of electromagnetic interference. Typical sources of electrical interference are: RFID access systems, other equipment containing radio transmitters, or faulty electronic equipment.

Near end-of-life

A low sensor battery may cause it to go offline and online intermittently.

• Contact Support if other causes have been ruled out.

Wrong placement

The sensor detects when an object is placed or removed within 0-5 mm from its front. When the status is changed, an ObjectPresentEvent event is raised. The sensors do not measure the distance to an object; they only measure if an object is present or not within 5 mm.

• Given the height of the sensor, a minimum gap of 3mm and a maximum gap of 8mm is required. Consult installation manual for best practices.
• Over time, buildings can shift slightly due to settling, temperature changes, or humidity. This may cause small but significant changes in the position of door frames, panels, or other structures near the sensor. If the distance or alignment between the sensor and the target surface changes, it can lead to incorrect or inconsistent proximity measurements.

Wrong sensor mode

Sensors default mode is Standard Mode. In this mode, the sensor sends a message every time the status changes. For doors with high usage (more than 100 openings per day), using the default sensor mode may lead to reduced battery life.

• Consider enabling Counting mode for high-usage doors. In this mode, the sensor increments an internal counter with each open/close event and periodically transmits the total count to the cloud. This reduces message frequency and improves battery life. Contact Support to enable Counting mode.

Impact of electrical equipment

If the sensor reports false or inconsistent detections, it may be affected by electromagnetic interference (EMI). This can happen when the sensor is installed too close to devices like fluorescent lights, motors, or large electrical machinery, which can disrupt its capacitive sensing.

• Reposition the sensor. Make sure to mount the sensor away from any possible electromagnetic interferences.

Condensation on the sensor surface

The sensor uses capacitive sensing and can trigger false alerts if condensation forms on its surface. This often occurs when warm air contacts a cooler sensor, especially in humid environments or when mounted near airflow or cold surfaces.

• Reposition the sensor. Make sure to mount the sensor away from airflow (vents, fans) and cold surfaces.