Pool thermometer test

WLan Poolthermometer Test 2018

Wlan Poolthermometer Test 2-Test Series

Since May 2018, the floating version of our popular WLan Poolthermometer Netatmo Modification has been available in our shop. In this blog post you will find out why I am developing this variant and what test series I have done in the process.

Since 2017, I have been offering the WLan Poolthermometer Netatmo Modification in my online shop. Now I have decided to develop another variant. Many interested pool, hot tub and pond owners from all over the world have contacted me. Everyone was excited by the idea of transforming the Netatmo inner module into a pool thermometer. Nevertheless, many wished that the external WLan antenna would no longer have to be led out of the pool or pond. The idea of a floating variant was born.

I summarized the requirements for the new floating WLan pool thermometer Netatmo modification as follows:

  • The thermometer must provide exact temperature readings
  • Waterproof case
  • Visually appealing floats
  • Housing needs to get heavier so it doesn’t float up
  • The structure should be based on the construction of the first and tried-and-tested execution, as so far there have been hardly any complaints.

Idea 1: The pool thermometer without an external antenna-floating on the surface of the water

One customer wrote to me that he would like to put the Netatmo module in a chlorine dispenser and let it swim on the surface. I also had a similar idea and got a visually appealing diving case. In it, I packed the Netatmo inner module and had it floated in a swimming ring at the water’s surface. Already at that point, I had the presumption that the housing would heat up on hot days, issuing false temperature readings as a result. For this reason, I have additionally plugged heat insulation into the upper part of the case.

To test whether this variant provides correct values, a test was carried out with the following structure:

Test Series 1:

  • The thermometer is located in a waterproof case without cable runs.
  • No external antenna
  • The case is placed in a swimming body made of PE foam, which is located about superf3 of the case above the surface of the water .
  • The case is filled with weights to make it float upright.
  • The structure is placed in a stream run to ensure a constant water temperature.
  • Medium difference gauge (homematic) is measured in the air temperature and water temperature.
  • Air temperature, water temperature and pool thermometer readings are then measured and compared over a longer period of time.

Goal: The readings of the pool thermometer should correspond to the water temperature.

As suspected, the case warms up too much on warm days. This measures incorrect temperature readings. For this reason, I do not offer this variant in the online shop. Conclusion: The case of the Netatmo module must be completely below the surface of the water in order to be able to deliver correct values.

 

Idea 2: The WLan pool thermometer should be located below the surface of the water and attached to a float

Test Series 2:

  • The thermometer is located in a waterproof case with cable performances.
  • The case is attached to a float with a string.
  • The case is filled with weights so that it is permanently below the surface of the water (about 5 cm below the float).
  • The Wi-Fi cable is attached from the case and above the float.
  • The air temperature and water temperature are measured using a difference gauge (homematic).
  • Air temperature, water temperature and pool thermometer readings are then measured and compared over a longer period of time.

Goal: The readings of the pool thermometer should correspond to the water temperature.

WLan Poolthermometer Test 2-Test set-up

Wlan Poolthermometer Test 2-Test Series

[box] Conclusion: Test Series 2 was successful. After the housing had acclimatized, correct values were issued. I was also somewhat amazed at how synchronous the temperature values of the Netatmo module were with that of the test probe (homematic differential meter) in the water.[/box]

Since May 2018, the module from Test Series 2 can be ordered from us.

Netatmo Poolthermometer Modification Floating Version

[button link=”/shop/wlan-poolthermometer-netatmo-modifikation-schwimmende-ausfuehrung/” type=”big”] Buy now[/button]

 

Leave a Reply

Your email address will not be published. Required fields are marked *