All,

 

Just wondering if anyone has used the AEOTEC mutlti-sensor or Everspring Sensor and converted it to an external sensor (ie: for a hot tub).  I am not too sure what the actual sensor is inside and how it connects but I assume it is an RTD, thermocouple type which should be easily adaptable provided one could get the spec's for it ???

I haven't opened up my Everspring unit but I suspect it's using something like the Dallas one wire sensors (DS1822) or similar.  If it is, there are a number of nicely packaged external probes that could be used in place of the internal sensor.

 

-Xathros

Since you are considering the AEOTEC, which is Zwave, I suggest mating an industrial thermocouple temperature sensor to a Mimolite.

 

Hot tub temps may be out of range of the devices you mentioned.

Nestor, I looked although it briefly at the Mimolite manual and don't see/understand how the connection would be made between the two, if you have a moment could you please help me out on this

Nestor, I looked although it briefly at the Mimolite manual and don't see/understand how the connection would be made between the two, if you have a moment could you please help me out on this

Admittedly, I haven't dug really hard into this, but from what I can see, the Mimolite can read a voltage and return a value via Zwave. I mentioned thermocouples as they are generally cheaper than a Resistance Thermal Device. Something like the following

 

http://www.farnell.com/datasheets/1734312.pdf

 

will return a standard 4- 20 mA signal, which can be easily converted to a voltage with a precision resistor and read by the Mimiolite.

 

Hope this makes sense so far.

Edited January 14, 201510 yr by Nestor

Got ya, I was hung up on trying to see how a thermocouple would direct connect to the mimolite, blond moment. Thanks for the response

All,

 

Just wondering if anyone has used the AEOTEC mutlti-sensor or Everspring Sensor and converted it to an external sensor (ie: for a hot tub).  I am not too sure what the actual sensor is inside and how it connects but I assume it is an RTD, thermocouple type which should be easily adaptable provided one could get the spec's for it ???

 

I opened up my Everspring unit and it  appears to use a thermistor for temp sensing.  The thermistor is nestled together with the humidity sensing grid and may be somewhat difficult to remove and replace with leads to and external sensor.  If done, you would likely need to recalibrate the unit to account for the added resistance of the leads to the external probe.

The sensors fit tightly into a molded area of the front case that is vented to the outside and fairly well sealed from the inside when the sensors are in place.

 

 

-Xathros

Edited January 14, 201510 yr by Xathros

I opened up my Everspring unit and it  appears to use a thermistor for temp sensing.  The thermistor is nestled together with the humidity sensing grid and may be somewhat difficult to remove and replace with leads to and external sensor.  If done, you would likely need to recalibrate the unit to account for the added resistance of the leads to the external probe.

Everspring.jpg

The sensors fit tightly into a molded area of the front case that is vented to the outside and fairly well sealed from the inside when the sensors are in place.

 

 

-Xathros

Well at least it's not wave soldered, good old bulky solder.  I assume the recalibration is part of/can be done through the everspring ?

Well at least it's not wave soldered, good old bulky solder.  I assume the recalibration is part of/can be done through the everspring ?

I'll have to dig out the docs that came with it.  I vaguely remember a way to adjust the unit but can't say for sure.  At worst, you could just deal with the reading being off and adjust for it at the ISY.

 

-Xathros

How would I adjust in the ISY, sorry my programming is basic and do not have much knowledge on anything other than IF, Then, Else's.

How would I adjust in the ISY, sorry my programming is basic and do not have much knowledge on anything other than IF, Then, Else's.

 

Lets say that after modifying the unit with an external probe and testing against a known accurate thermometer, the unit is reading 3 deg above actual. (ie: 80 deg actual reads as 83 deg on the multi sensor)

 

Lets say we want to keep the temp between 80 and 85:

If
        Status  'ZWave MultiSensor' < 83° F
 
Then
        Set 'Heater' On
 
Else
   - No Actions - (To add one, press 'Action')

and

If
        Status  'ZWave MultiSensor' > 88° F
 
Then
        Set 'Heater' Off
 
Else
   - No Actions - (To add one, press 'Action')

So - simply move your decision points up by 3 degrees.

 

Make sense?

 

-Xathros

Ok got it, i assumed you meant some way to offset the temp inside the isy (apply math to the raw value)