Arduino sensors from china

[MacIntoshCZ]

Hi,
do you think those sensors are (or could be) used in industry? I would like to buy some premade sensors boards like "arduino tagged ones" (because i need a lot of them and also i am to lazy...). For example this rain sensor (for my greenhouse project). It costs 0,7$ with shipping. If i look at our market there are only somes made in poland that cost 50$. There are also china resellers that sell those ALI things at tripple prices... Hah funny
I would like to make things at a certain level... Even i make them at a home.
BTW if you know some trusted "arduino tagged" seller can you please reccomend me?

 

[JimB]

For example this rain sensor (for my greenhouse project). It costs 0,7$ with shipping.

Not exactly a fully engineered solution.
It is just two circuit boards and a bunch of wires, no environmental protection whatsoever.

If i look at our market there are only somes made in poland that cost 50$.

What do the ones from Poland look like?
Do they have proper housings/mountings?
Could that be where the extra $49.30 went?

JimB

 

[MacIntoshCZ]

Not exactly a fully engineered solution.
It is just two circuit boards and a bunch of wires, no environmental protection whatsoever.


What do the ones from Poland look like?
Do they have proper housings/mountings?
Could that be where the extra $49.30 went?

JimB

It was probably germany instead of poland ( i cant find it know, but this is 80$) :

Kemo M152K dešťový senzor hotový výrobek 12 V/DC | Conrad Electronic

Koupit Kemo M152K dešťový senzor hotový výrobek 12 V/DC u Conrad Electronic.

www.conrad.cz

I dont think that this has price of 80$ its relaywith schmitt trigger inside plastic case.
Its like monitor stand from apple....

 

[JimB]

The Kemo sensor is a fully engineered product.
It works by capacitively sensing the presence of water.
The detecting element is not exposed to water.
It has a heater to dry the water detecting surface.
It has a sealed housing.

The Chinese rain sensor is just a bag of bits,
It has exposed metalic sensing elements which resisitively detect the presence of water.
It has no housing, no environmental protection.

do you think those sensors are (or could be) used in industry?

The Chinese one, no way.
In the days when I was a project engineer, that (and I) would have been laughed out of the door at the first design review.

The Kemo one, yes.
$80 and the sensors are sorted. Easy.

JimB

 

[MacIntoshCZ]

The Kemo sensor is a fully engineered product.
It works by capacitively sensing the presence of water.
The detecting element is not exposed to water.
It has a heater to dry the water detecting surface.
It has a sealed housing.

The Chinese rain sensor is just a bag of bits,
It has exposed metalic sensing elements which resisitively detect the presence of water.
It has no housing, no environmental protection.


The Chinese one, no way.
In the days when I was a project engineer, that (and I) would have been laughed out of the door at the first design review.

The Kemo one, yes.
$80 and the sensors are sorted. Easy.

JimB

Ok so those arduino kits are just for kids to learn whats going on.
Thanks

 

[JimB]

so those arduino kits are just for kids to learn whats going on.

Yes.

JimB