Why is there no Bluetooth pressure sensors on the market

Jeffmyers5266

I use tilt hydrometers to monitor the pressure and temperature during fermentation, but I’d like something to also log or monitor the pressure. It could also be useful for kegs in the kegerator to identify leaks. Awhile back I found Plaato had a tri clamp pressure sensor they were evaluating, but it seems to have gone away. You’d think a product that simply senses the pressure and provides that value via Bluetooth would be available somewhere, but it doesn’t appear so. Anyone have a similar need or solution?

day_trippr

"pressure"?

Jeffmyers5266

Sorry, tilt to measure temperature and gravity**. What I don’t know how to monitor is pressure

day_trippr

Ok then, so how much do you want a bluetooth pressure sensor?

wjwb1xyvs51.png

Bluetooth Pressure Sensor BluePSIBluePSI is a wireless pressure sensor used for the measurement of liquid or gas pressure as well as temperature measurement. These Bluetooth-enabled pressure sensors, with the help of our free software, allow you to continuously monitor pressure in multiple locations simultaneously on your iOS...store.motionics.com
There may be other - less pricey - devices. This BluePSI device gets almost all the hits...
[edit]
This one would save you $300!
https://transducersdirect.com/products/pressure-transducers/wireless-pressure-transducers/cirrussense-tdwlb-wireless-pressure-transducer/
Cheers!

PCABrewing

The Motionics unit would have to be mounted outside the vessel, looks like 1/4 NPT so you would have to do some adapting.
Not difficult but worth it?

day_trippr

Unless one would like to try dropping a Bluetooth TPMS sensor into a keg (someone ought to try it - FOR SCIENCE! ) one should expect external coupling, and 1/4" NPT is eminently doable - use an adapter on the 1/4" male flare threaded stem of a ball lock gas QD, for example, for easy-on/easy-off use.
Worth it? Not my call
Cheers!

Thorrak

I meeannnnnn.... Flite - Keg Level, Temperature, and Pressure Sensor
Nothing prevents you from doing the same for a fermenter. Swap the ESP8266 for an ESP32, and you have Bluetooth!
Not battery powered, but hey - fewer batteries to buy this way.  

PCABrewing

Problem is that inside the keg there could be no atmospheric pressure reference.
On a ball lock keg you could just "T" it in at the outlet side of the regulator since it is already 1/4" NPT.
I could definitely fit it together, probably without even going to the hardware store .

day_trippr

There's no need for a "pressure reference", TPMS sensors are the digital equivalent of spring-loaded pressure gauges...
Cheers!

Thorrak

I was under the impression even those used a "pressure reference". The reference in that case is the ambient (outside) pressure. That's why a spring loaded pressure gauge reads higher pressure at higher elevations even if the amount of air in your tires hasn't changed.

day_trippr

"Direct" TPMS sensors have no notion of "outside the tire" pressure.
Cheers!

Thorrak

I thought that was why they were mounted on the tire valve -- so they would be exposed to outside (reference) pressure?

PCABrewing

Hmmm...

PCABrewing

Well it appears that they do have a spoofed reference via a pressurized chamber internal to the sensor.
So while it doesn't know the actual ambient pressure, it has a baseline that the sensor membrane deflection is calibrated to.
Sort of like hitting the Tare button on our grain scale.
A simple spring system would not work inside the tire.

Thorrak

Huh. No notion of "outside the tire" pressure. That's an interesting way to do it!

Buckeye_Hydro

How about just using a pressure gauge?

dtashmore547

I put together a fairly simple device using an esp-12f device and a pressure sensor plus a small power supply module, that gives me the pressure on a simple web server on my phone, needs a bit of soldering knowledge, assembly on a small prototype board and fitting inside a plastic box, I use it to keep track of my fermentation pressure. if anyone is interested I can post the project.

DuncB

Pressure sensor and even autospunding available on brewpiless.
I'll look up some info I saw.

DuncB

Link to Vitotai on git hub

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Pressure Transducer and Pressure Transducer control · vitotai/BrewPiLess WikiUse an ESP8266 to replace RPI and Arduino. Running BrewPi without Pi, therefore, BrewPi-Less - Pressure Transducer and Pressure Transducer control · vitotai/BrewPiLess Wiki

github.com

DuncB

Good info here
Post in thread 'iSpindle Concentrators, Repeaters, Bridges, Hubs' iSpindle Concentrators, Repeaters, Bridges, Hubs
@korev has this working.

day_trippr

As I said, the digital equivalent
Cheers!

PCABrewing

Agree, and I am not impressed with the reliability regardless.

PCABrewing

I think the goal was remote monitoring.

Ballaratguy

Not sure about this but…..
What about remote tire pressure monitoring. They have them for vehicles. I think it’s a valve replacement and a control box thingio

day_trippr

"Tell us you didn't read the entire thread without telling us you didn't read the entire thread"
Cheers!  

zeljko

And how about Nautilis pressure gadget?

zeljko

I made iRelay upgrade with pressure sensor....

esdill

My Brewbot (www.mybrewbot.uk) has a pressure sensor that interfaces with their brew controller. The brew controller also interfaces with temperature probes, Tilt, and with smart plugs to control fermentation. It uses bluetooth for the Tilt interface, and wifi to post data to the cloud.

DuncB

Please post details when you have time.

zeljko

First of all, I wish everyone a Merry Christmas!
Nautilis WiFi pressure – is a device that receives data from a pressure sensor, shows it on the screen and forwards it to applications via a WiFi network. With the desired applications, you can monitor the desired values on your computer and mobile applications, depending on the type of application you are using. Currently supported applications are: BrewSpy (Send interval min 5min), SensorSpy (Send interval min 5min), Brewfather (Send interval min 15min). Depending on the application, in case of alarm values, they will be notified via a notification on the mobile phone.
The Nautilis iPressure device allows pressure units in Bar or PSI, and temperature in degrees C or F.
If you know what iRelay is... and you use iSpindel... The new version of the device now also supports a pressure sensor. So now, in addition to all the data from the ispindel, you can also monitor the external temperature and pressure... I haven't been using the ispindle lately because my cooking is always in the recipe (more than 170 batches) So I use the temperature sensor on the cable and the pressure sensor on the fermentation, and later it is useful for carbonation in the keg if needed. Also to see if my co2 is leaking.
I worked hard to make the device correct... And now after several months of testing, I can say that the thing is great. Unfortunately, the price is not the most favorable for the Croatian standard...but people started using it because apparently there were too many problems earlier, so they want additional security.
I would not like to do any advertising or send any links. If you are interested in any more details, just send me a message