Anyone have a good recommendation for a high pressure transducer. In the range of at-least 300 PSI, maybe as high as 600 PSI. Preferable with supply voltage of 3.3V and I’m guessing analog output? In my quick search seems like most are 5V supply or more for industrial applications with 24V supply. Just so much easier if I can use the 3.3 V supply from Particle or equivalent. I’ve done low pressure applications using board mount I2C pressure transducers and just barbed fittings on it but high pressure will require external and likely a cabled solution.
Figured there must be someone in this community that found a good hardware option. A recommendation with a link would be appreciated!
@Rftop This is perfect! Exactly what I was looking for. Do you order directly from them or have you gone through a distributor (Digikey or otherwise)? Thank you very much for sharing!
It was 2018 the last time I needed to Order these, and I think this version was relatively new to the market at that time. These are really good sensors.
If I were you, I’d contact their Georgia USA Office and request to purchase some samples.
They will likely ask some questions about your application and discuss MOQ’s.
I don’t remember seeing these at any distributor… but that could have changed in 5 years.
Dwyer may have a pressure transducer that fit’s this application by now, might be worth a look too ?
If not, a Ratiometric Output will usually work with Particle Devices, but you’ll need to use a sensor with a higher range to stay under 3V3 output at your highest expected condition. That’s not an optimal solution, but it works if you don’t have a choice.
Yeah, I think I’ll reach out to them on Monday… Thanks for the info. Initially I like the idea of I2C but my board/enclosure already has a M12 connector on it that is already connected to GPIO pins that today I use for a 0-3.3V analog input so might be a little less hardware re-work going the Ratiometric route instead of I2C. I’m sure I’ll figure something out with the info provided.
I’m sure the other one is a better sensor, but this one is cheap and easily available. I use the 100 PSI version for measuring water pressure in my house, but they are available up to 300 and 500 PSI versions. It’s 5V, not 3.3V, however.
That sensor running from VUSB so I had 5V available, but adding a boost converter isn’t that bad. I have a LiPo powered 12V oil tank sensor; this is the circuit I used for the boost converter and scaling the analog output.
Here’s a 5V boost circuit. Using a pre-built module is even easier, but just adding the components to your board isn’t bad at all. All of these components are big enough to hand-place easily.
I’ve used many of the same Sensors that @rickkas7 linked to, with the previously mentioned Ratiometric plan for 3V3.
Quick comment on those cheap sensors:
They exhibit a “bathtub” failure rate. If an individual sensor works for the first few days…it’s good.
They typically fail very early if they are going to fail. I successfully used many of the cheap pressure sensors, but I would always bench test them in groups of 10 before deploying them to the field with a cheap manifold similar to this by adding threaded bushings.
At that time these cheap sensors were only $6 or $7 each.
@rickkas7, Do you know of a reason that a 5V Boost Circuit couldn’t be a stand alone board inline with the sensor wiring, and also scale the output to 3.3V max ? The ability to Switch the Boost Circuit On/Off would be beneficial to battery powered Particle devices, and opens the door for easy 5V analog sensor use.
Those Amazon sensors are pure rubbish. Don’t even waste your time or money on them. They are not isolated sensors. Any liquid makes direct contact with the sensor. I dissected one on my lathe. I had 100% failure rate on the 100 psi sensors measuring 30 psi water pressure.
I got the Honeywell MIP series and haven’t had any issues. Sure they cost more but the Amazon ones were a total waste since they failed after the return window.
