DT sensors can handle some exposure to water, but they are not designed for prolonged underwater use. This article explains what to expect when using sensors in wet or submerged conditions and how to protect them.
Who is this article for?
Anyone planning to use DT sensors in water or very wet environments, for example, in water tanks, pipes, outdoor installations prone to flooding, or other aquatic settings.
Key things to know about sensors and water
1. Not all sensors are water-resistant
Only 19mm sensors are rated IP68 for water resistance. The following sensors are not IP68 certified and should not be submerged:
- Motion sensor
- CO2 sensor
- Any variant of the Tactile Touch sensor
2. Short-term submersion is generally okay
For IP68-rated 19mm sensors, short-term submersion lasting a few days is generally acceptable and won't harm the sensor, as long as you allow proper drying intervals between submersions.
3. High water temperatures shorten safe submersion time
Be cautious about elevated temperatures in aquatic settings. Higher water temperatures can accelerate water ingress into the sensor, meaning the sensor can safely be submerged for a shorter period of time.
4. Avoid continuous long-term submersion
We strongly advise against prolonged, continuous submersion (such as weeks or months). Over extended periods, water can compromise the sensor's protective seal and cause water-related damage. If you need to keep a sensor underwater for a long time, consider placing it inside a waterproof enclosure made of glass or thicker plastic. (This does not apply to Water sensors.)
5. Wireless range is significantly reduced underwater
Submerging a sensor in water greatly reduces its wireless communication range. Water weakens radio signals, leading to a substantial decrease in signal strength and transmission distance. Submerged sensors may experience limited or unreliable connectivity with Cloud Connectors.
Troubleshooting / FAQ
Q: Can I permanently install a sensor underwater?
A: No. Even IP68-rated 19mm sensors are not meant for permanent underwater use. If you need long-term submersion, place the sensor inside a waterproof enclosure made of glass or thicker plastic to protect it. Also, keep in mind that the wireless range will be significantly reduced when the sensor is submerged.
Q: My sensor stopped working after being in water. What happened?
A: If a sensor was submerged for too long or in warm water, moisture may have gotten past the protective seal and caused damage. Check whether your sensor model is IP68 certified. Motion sensors, CO2 sensors, and Tactile Touch sensors are not rated for water exposure at all.
Q: Why is my submerged sensor not sending data reliably?
A: Water significantly weakens wireless radio signals. A submerged sensor will have a much shorter communication range than one in open air. Try placing the Cloud Connector as close to the sensor as possible, or consider whether the sensor can be positioned so it is not fully submerged.