Fluid pressure sensor

[markchang]

Hello,

I want to manage a fluid circuit controlling its pressure.

After some searches, I don’t find pressure sensors with z wave capabilities.

Anyone knows if they exist or is possible to build one easily?

Regards,

J

[lanbrown]

Z-Uno 2 board with the appropriate sensor(s) and controls?

[markchang]

I don’t find pressure sensor for fluids, this is the problem.

I know that it is possible to use a regular pressure sensor, know its calibration and then use resistance to use it as a pressure signal but… I want something made, plug and play in fluid line

[michap]

You think about something like this?

https://www.aliexpress.com/i/33028576390.html

You can find it also in local stores...
The analog output you can connect to Z-Uno.

Michael

[markchang]

Yes, something like that but made, I mean, sensor + plate plug and play

[lanbrown]

That is a very limited use case. If a company did decide to make something like that, you wouldn't like the price because of the low volume means high price to sell at to recover their costs.

[michap]

That is a very limited use case.

Right.
I would take a Z-UnoG2 and this sensor and make it myself. It is really not hard to do.
The "hardest" work is to find/make/print a case for the sensor

Michael

[markchang]

In ma case, The box designed and printed will not be The problem

I understand your arguments. Bad news for me

[lanbrown]

The other advantage of the Z-Uno G2 is that it will support the latest Z-Wave specifications and down the road, if a new Z-Wave specification is released, you can port the sensor and most if not all of the code over to say a Z-Uno G3.

I would also think the limited use case for what you're looking for, support and firmware updates might be non-existent.

[Steve_Elves]

Depending on the pressure range you wish to measure, there are a number of devices available that provide a 0.5V - 4.5 VDC analog signal for water pressure. I found a couple from DigiKey: a) Seeed Technology part number 1597-1515-ND for about $20 CDN that will measure 0-1200 kPa, and b) Honeywell Sensor part number MIPAN2XX100PSAAX for about $110 that will measure 0-2400 kPa. I'm using a similar one to monitor the pressure from my well water system; it's totally reliable. I was able to write a small sketch that reports the pressure every couple of minutes - dead easy. The Z-Uno can measure an analog input in that voltage range with no difficulty. Took a bit of fiddling to calibrate properly against a verified gauge, but has been rock steady since.
I first tried a cheapo sensor from Aliexpress in China. Was advertised that it would measure water pressure, but the sensing element wasn't waterproof and it corroded and failed within a couple of weeks. Would be useful for petrol or oil, I guess, but not for water. Buy a better one from a reputable dealer.