The Autonerdz Community Forums - Pressure transducer

Ron Mcleod Guru Member Picogroup Offline Networking is the only way to go Posts: 499 Mcgraths Hill New South Wales Australia Gender:	Pressure transducer Jan 6^th, 2012 at 5:04am Hi Im looking at buying a pressure transducer e.g. Pico WPS, can someone tell me if there is a better product on the market or is this one the best ??? I will be using it for running comp tests and maybe fuel pressure and so on, I already have a FLS but I know I can't use this tool for everything I want.... Thanks in advance Ron
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Brad H Super Nerd Offline Elevation 367 metres Posts: 1,115 Kalgoorlie Western Australia Australia Gender:	Re: Pressure transducer Reply #1 - Jan 6^th, 2012 at 6:21am Ron, the WPS is the cat's meow Look at any other transducer capture along side the Pico and you'll see.
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Randy H. Super Nerd Picogroup Offline Tools are only as good as the Tech holding them Posts: 1,693 Bardstown, Kentucky Kentucky USA Gender:	Re: Pressure transducer Reply #2 - Jan 6^th, 2012 at 6:25am WPS is best by far, but the Fluke PV350 is nothing to sneeze at if you know a few tricks to enhance its performance
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PRESTON LSD Guide Picogroup Offline "Fix like a champion today" Posts: 4,961 Jensen Beach Florida USA Gender:	Re: Pressure transducer Reply #3 - Jan 6^th, 2012 at 6:57pm I'm glad I went straight for the WPS, it's awesome. I'm amazed almost every time I use it how accurate it is. Get the whole kit and you will not be disapointed.
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Ron Mcleod Guru Member Picogroup Offline Networking is the only way to go Posts: 499 Mcgraths Hill New South Wales Australia Gender:	Pressure transducer Reply #4 - Jan 7^th, 2012 at 1:30am Hi Thanks for the advice guy's, I had already decided on the WPS really but just thought I'd ask the experts first...... I will let you know when I get it and post some waveforms up so I can get some advice for a beginner........ Thanks Ron
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bigblockchevy Freshman Member Picogroup Offline Posts: 1	Re: Pressure transducer Reply #5 - Feb 12^th, 2012 at 7:14pm What are the special tricks for the Fluke? I have one but wish I had the money for the Pico
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benmixmaster

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Re: Pressure transducer
Reply #6 - Feb 14^th, 2012 at 11:26pm

I would like to know to? What the special tricks for the Fluke are?
The only thing I can think of is using the KPA scale gives better resolution compared to the PSI. and use the picoscope software filters after you have recorded, to clean up the signal a bit if needed.
The fluke works pretty good, but I would like try the pico transducer, I just wish the vacuum sensor on pico could be used the same time as the higher pressure side.

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zorroplateado Freshman Member Picogroup Offline I'm an Autonerd Posts: 2 Oceanside ca California USA Gender:	Re: Pressure transducer Reply #7 - Dec 11^th, 2012 at 10:51pm I have a versus scanner from snapon and I'll like to buy a wps 5000 and I'll like to know if anybody knows how it works on the versus thanks in advance
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Tom Roberts

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Re: Pressure transducer
Reply #8 - Dec 12^th, 2012 at 8:41am

zorroplateado wrote on Dec 11^th, 2012 at 10:51pm:

I'll like to know if anybody knows how it works on the versus

It does. You just have to adapt the BNC cable to the banana sockets on the Verus (we stock the adapters). You will not be able to scale in pressure units is all. That just means you'll have to do the math to convert the voltage to pressure for the scale you are using.

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jarvissamuel Super Nerd Picogroup Offline I love YaBB 1G - SP1! Posts: 1,154 Denver Colorado Colorado USA	Re: Pressure transducer Reply #9 - Dec 13^th, 2012 at 7:00am Here is an image of the WPS being used on a heritage Vantage:
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Fiorano Cars UK

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Re: Pressure transducer
Reply #10 - Dec 19^th, 2012 at 6:05am

We're looking at different transducers at the moment but need a larger range than the Pico WPS500X:
Range Pressure range Accuracy Response time Output scaling
1 -15 to 500 psi
-1 to 34.47 bar 1% of scale 100 µs 10 mV/1 psi
(500 psi = 5 V)
2 -15 to 50 psi
-1 to 3.45 bar 1% of scale 100 µs 100 mV/1 psi
(50 psi = 5 V)
3 -5 to 5 psi
-0.34 to 0.34 bar 5% of scale filtered 1 V/1 psi
(5 psi = 5 V)

We have the First Look unit, but can't find anywhere the tech spec on that unit, even Pico, AutoNerdz or Senxtech who make them, all fail to give any tech info!

Fluke are one of the few others to do an automotive unit with their PV350, but it is effectively the same overall scale although the accuracy and ranges might be different, and from the comments here, it seems the PICO is massively superior ... is that both resolution and noise reduction?

thanks
Richard

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Tom Roberts

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Re: Pressure transducer
Reply #11 - Dec 19^th, 2012 at 6:46am

What range did you need, Richard?

There are only three transducers out there that I am aware of that produce accurate results under dynamic conditions such as in cylinder pressure testing. The WPS, the Fluke PV350, and the DCTI. All others skew results under these conditions.

The WPS has superior sensitivity and versatility.

The FirstLook does not measure pressure and has no specs. The voltage change is relative to the amount of pressure change and the rate of change. Any steady state is a zero output. It only measures changes. It's a pulse sensor not a pressure transducer.

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Fiorano Cars UK

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Re: Pressure transducer
Reply #12 - Dec 19^th, 2012 at 9:27am

First Look ... ok, that answers that then.

Range.
We are looking to map things like the F1 clutch, to look at the relationship between clutch plate position and pressure ... the system works in the 40-60 bar range. There are a few other high pressure range applications, but 60 bar is about max, though 100 bar max might give some future leeway as car makers increase pressures!

I think we'll be adding a Pico WPS500X in the New Year in any event.

Whats the DCTI?
thanks
Richard

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Tom Roberts Autonerdz Administrator Picogroup Offline Autonerdz Founder Posts: 8,598 Olympia Washington USA Gender:	Re: Pressure transducer Reply #13 - Dec 19^th, 2012 at 10:18am Fiorano Cars UK wrote on Dec 19^th, 2012 at 9:27am: Whats the DCTI? We don't carry them anymore because the WPS took over that market for us but they are still available here: http://www.aeswave.com/DCTi-2-channel-Transducer-Interface-p8908.html
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crackerclicker Super Nerd Picogroup Offline Elevation 834 ft Posts: 2,361 Watertown Wisconsin USA Gender:	Re: Pressure transducer Reply #14 - Dec 19^th, 2012 at 7:45pm Fiorano Cars UK wrote on Dec 19^th, 2012 at 9:27am: the system works in the 40-60 bar range rumor has it that pico is testing a higher pressure transducer .
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