Ask：
we need some support on the SHLT5 soil mosture sensor. We bought them from an Italian reseller : https://www.robot-italy.com/it/soil-temperature-moisture-sensor-sht10.html
Currently we are developing a microcrontroller based soil humidity/temperature IoT station and at the heart of the system we have chosen your sensor. During the test period it rained therefore the ground started to became more and more wet so all the sensors started to read higher humidity values until all of them (exept one) started to return strange values. Sometimes they fail the humidity value (returning a value too high) but mostly they return 615.35 as temperature and -6274.38 as humidity.
If can help you we placed the sensor inside a rounded metal case (attached image case.jpg) that protect it from mechanical stress but permit the contact with the soil to read the humidity; this compound is then palaced on the ground 30cm deep (more or less). The whole system is visible in the image kit-jpg.
Worried ‘bout what could had happende we carefully removed the metal cover and discovered that the pcb soldered electrical connections suffered from what can be called “corrosion inducted by current flow”. The proof is in the images you can find attached in this e-mail.
We are surprised and worried ‘cause this is designed to be “waterproof package, and can be used for measurement of soil” as we can read in your datasheet (https://cdn-shop.adafruit.com/datasheets/SLHT5.pdf). We have purchased a set of 10 sensors and most of them suffered from this type of corrosion leading to a sensor malfunction. In rare case the sensor recovered after 1 or 2 days (after removing it from the ground and placing in our office in the air) but our product is designed to be placed on the ground and never be moved ‘cause by design we need to measure the humidty of the soil!!!
Your sensor have to be placed on the ground and have to work in any situation, not only in the desert. When we have rain (not monsones) the soil became wet and it would be ok if the readings are high or out of a normal range but is not acceptable that we have a malfunction, in other words the sensor stop to work and potentialy is damaged forever so our future customers will became very angry of that…could you imagine a soil moisture sensor that stop to work after the firs rain?
Hoping you can give us a hint and a solution to what we discovered we look forward to hear from you very soon.
Sincerely,
我们需要对SHLT5土壤传感器的一些支持。我们从意大利经销商处购买了这些产品：https：//www.robot-italy.com/it/soil-temperature-moisture-sensor-sht10.html
目前，我们正在开发基于微控制器的土壤湿度/温度IoT站，并且在系统的核心，我们选择了您的传感器。在测试期间，下雨，地面开始变得越来越湿，所以所有的传感器都开始读取更高的湿度值，直到所有的传感器（exept 1）开始返回奇怪的值。有时它们会失去湿度值（返回值太高），但主要是温度回落615.35，湿度为-6274.38。
如果可以帮助您，我们将传感器放置在圆形金属外壳（附件image.jpg）中，以防止机械应力，但允许与土壤接触以读取湿度;该化合物然后在30cm深（或多或少）的地面上调理。整个系统在image kit-jpg中可见。
担心会发生什么事情，我们小心翼翼地取下了金属盖，发现pcb焊接的电气连接遭受了所谓的“电流腐蚀”的影响。证明是您可以在此电子邮件中附加的图像。
我们惊讶和担心，因为这是设计为“防水包装，可以用于测量土壤”，我们可以在您的数据表中阅读（https://cdn-shop.adafruit.com/datasheets/SLHT5.pdf ）。我们已经购买了一组10个传感器，其中大多数都遭受了这种类型的腐蚀，导致传感器故障。在罕见的情况下，传感器在1或2天后恢复（从地面上取下并放置在我们的办公室中），但是我们的产品被设计成放置在地面上，并且不会因为我们需要测量的设计而被移动土壤的潮湿！
您的传感器必须放在地上，不得不在任何情况下工作，不仅在沙漠中。当我们下雨（不是monsones）时，土壤变湿，如果读数高或超出正常范围，但是不能接受，我们有故障，换句话说传感器停止工作和潜在的损坏永远，所以我们的未来的客户会变得非常生气，你可以想象一个土壤湿度传感器停止工作后，第一个雨？
希望你能给我们一个提示和解决方案，我们发现我们期待很快收到你的消息。
此致
Reply:
See you posted out of the product pictures and product use description, we are too sorry. The product is built-in SHT10 temperature and humidity sensor, is measured by the principle of soil air column to measure the soil temperature and humidity. Because the sensor in a short time soaking or soaking the water state will not be damaged, we increased the filter impurities to filter impurities, but because of its main material itself is copper, in harsh environments do appear that you said this State, so the structure and principle of the product decision, the product is mainly used for short-term soil temperature and humidity test. Use this product for soil temperature and humidity measurement, the sensor in the soil easy to condensation, when condensation occurs, please refer to the SHT10 manual to try to open the heating function to dew, and then use.
For the possible long-term immersion of the application environment, do not build the use of this product. If you really need long-term outdoor use, it is recommended to use 316 stainless steel probe type of similar products.
看到你贴出来的产品图片及产品使用描述情况，我们也很过意不去。该产品内置的是SHT10温湿度传感器，是通过测量土壤内部空气柱的原理来测量土壤温度及湿度的。因为该传感器在短时间浸水或泡水状态并不会损坏，我们增加了过滤杂质的防护罩来过滤杂质，但因其主要材质本身是铜，在恶劣环境中确实会出现你所说的这种状态，故该产品的结构及原理决定，该产品主要用于短期土壤温湿度测试。使用本产品进行土壤温湿度测量，在土壤中传感器易结露，当发生结露时，请参考SHT10使用手册尝试打开加热功能进行除露，然后再使用。
服务咨询400-8800-312
