Water temperature - how long will it take for correct temperature
-
If this can help you, here is the temperature graph for an openwater swim in the sea which was 17°C
(The air was around 20°C)
Watch is a Suunto Vertical Titanium Solar, worn on the wrist.
-
@tuxella many thanks
… cool, that means around 10 seconds … that’s great -
@Gosem you should rather read 7 to 8 minutes
Suunto Vertical
Suunto Traverse -
@sebchastang … ah ok! Thanks
… but it is the Vertical, not the Ocean, perhaps the Ocean has other sensors -
Yes, looks like around 10 seconds to get the correct temperature reading (the entire swim was only 7 mins 57 seconds).
-
@Alejandro My bad, sorry!
I thought 00:7’57 was the position of the cursor on the graph.Suunto Vertical
Suunto Traverse -
@sebchastang
No worries. -
@Alejandro … ok, so 10 seconds is correct
-
Time is expressed as hours:minutes:seconds. The whole swim was around 40 minutes and the marker is at 7 minutes and 57 seconds.
-
@tuxella … thanks for clarifying
… do you know if this changed with the Suunto Ocean? -
@sebchastang Seems you were correct after all! LOL
-
@Alejandro I am totally confused now
Could anybody from Suunto answer my question if there is a second temperature sensor in the glass?
Thanks -
@Gosem
Hi, could really nobody answer the sensor question?Many thanks
-
Sorry mistake, I thought you asked for time…
-
I’ve used a Suunto EON steel extensively for many years and the temp reading is stable within seconds as soon as you descend. If that is the only thing holding you back, then I think its safe to say that the temp recording on all Suunto dive computers is relatively “instant”. Hope this helps.
-
@Alejandro Now is the question if this super fast temperature pick up can be expected of the Ocean as well.
-
Yes I understand the question and, in the absence of a response from a SCUBA diver using the SO, I gave my answer based on my experience with an EON steel. Here’s another suggestion: buy it from Suunto direct and send it back for a full refund if it doesn’t meet your needs. Again, I hope this helps.
-
@Alejandro Apologies.
I was excited by how fast it peaks up temperature based on your experience. So yes. Your experience definitely helps. My question was meant more like: would be so cool if the Ocean had the same capabilities. -
As divers we learn that water is more stable than air in terms of temperature – not to mention that you will lose body heat about four times faster in the water than on dry land. In other words, it’s not that difficult for modern equipment to record fast, accurate temperature under the surface of the water. Hence I’m saying to the other guy just buy it and go diving… Then maybe he can tell us!
-
@Gosem Just did a test by dunking my watch into slightly chilled water. Here’s what I got:
It took 40 seconds for the sensor to get from about 29°C to 26°C, and nearly another minute to get from that to the final reading of 25°C. But as you can see from the graph, despite the 25°C reading, it was still equalising the temperature towards the very end of the test.
The test setup:
All sensors are allowed to rest in a shaded and well-ventilated area to be allowed to acclimate to room temperature. The sensors comprise a Suunto Ocean, an Aranet 4, and a Thermapen IR (temperature probe only).Their initial readings just prior start of the test were:
- Suunto Ocean: 29°C
- Aranet 4: 29.2±0.3°C
- Thermapen IR: 29.0±0.4°C
These represent the ambient air temperature. For what it’s worth, the Thermapen IR comes with a calibration certificate dated June 2020 that is traceable to a laboratory-standard thermometer.
I then initiated a custom sport mode for recording temperature and left my watch in slightly chilled water. The initial temperature of the water according to the Thermapen IR was 24.6±0.4°C.
The test ended when I came back from my shower and saw that the watch and the Thermapen IR gave (apparently) the same reading of 25°C.
Hope that helps.
