Source for pressure transducer

Jonathan Technician Digby, Nova Scotia Posted   Latest  

Hello everyone, looking for a source of good pressure transducers. Wps500 and pv350 are not in budget at this time. Made a in cyl pressure transducer with one from Amazon but it has a 2ms refresh, which makes the waveform look horrible. Just wondering if anyone has had good results with certain transducers. All I can find are cheapies or one almost the price of the WPS.

Ps, Does anyone know what transducer the WPS 500 has?

Thanks 

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Stephen Technician
Gallatin, Tennessee
Stephen Default
 

I’m curious what the Amazon transducer is. I don’t know why a transducer would have a refresh rate. it should be live. What scope are you using? I have used the cheapies on Ebay with good results. There are often high end industrial transducers on ebay at low cost.

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Dale Diagnostician
Sioux Falls, South Dakota
Dale Default
 

MY father built me one out of PVC and a piezo sensor along with the BNC connector. Have yet to test it though as I seem to have put it in the garage and it was during a time period that things got moved around so haven't seen it lately. Curious as to how it'll work and if I'll need to glue the PVC end caps to get any readings. He did send extra piezo discs in case I have issues so I guess if one…

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Olle Instructor
Albert Lea, Minnesota
Olle Default
 

The Px35 is about $90.-, so maybe about $110 in your hand. It is very good. I have one I use. injectorservice​.​com​.​ua/px35​.​php#px35

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Grant Owner
Tauranga, New Zealand
Grant Default
 

Hi Jonathan I found this link and only yesterday ordered the parts to make it. youtube​.​com/watch?v=pw53aO… Regards Grant

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Doug Owner
Midland, Michigan
Doug Default
 

Much depends on what you want to achieve with the transducer. Some have filtering which can eliminate frequencies that may contain valuable information, others may not have the ability to handle higher pressures. John Brock invented the First Look Sensor (FLS) and it took him 6 years to get it right, so while there may be less expensive ones on the market, a lot of research, trial-and-error, and…

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Dale Diagnostician
Sioux Falls, South Dakota
Dale Default
 

Michael Nicholson made some himself. HE used it to help fund getting him to Kansas City this past spring for the annual show. I believe the group is Professional Automotive Technicians on Facebook. I believe he's from out in Washington himself. Wealth of knowledge! The FLS is a great tool. Have one myself.

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Kevin Owner/Technician
Poughkeepsie, New York
Kevin Default
 

Mike is a great guy, purchased a sensor from him. But its not a pressure transducer. Its for looking at pressure/vacuum pulses. Nice quality build and worth the money

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Tommy Technician
Smyrna, Georgia
Tommy Default
 

The autex brand on amazon is ok but not perfect does better with cranking compression than running. I purchased the 150psi and 200psi.

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Dale Diagnostician
Sioux Falls, South Dakota
Dale Default
 

Nice Waves!

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Dale Diagnostician
Sioux Falls, South Dakota
Dale Default
   

Are you looking just to do compression? This is a video by a great trainer from what Googling I've did online and read about him plus watching his videos. I came across this video one day and have saved it for when others ask about compression, relative compression. IF you have a scope which from the sounds of it you may otherwise one wouldn't be looking for a pressure transducer unless they're…

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Caleb Technician
Mishawaka, Indiana
Caleb Default
 

So I used a Snap on one for about 3 years. It's really only good for checking valve timing. The scaling was awful and never gave the correct values. A couple times I did use it to see an exhaust valve closing early. I'm not knocking your budget at all man. I watch my money also, just want you to be aware of something. The cheap ones are cheap for a reason. They have a lot of limitations. I'm not…

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Pedro Mechanic
Tacoma, Washington
Pedro Default
 

I have read that you have too make sure like they have metion here for what your using the sensor there is pressure sensors and there is absolute pressure sensor. There is a big difference . The difference is that sensors like the first look i belive measure change in pressure and sensors like the wps500 measure actual pressure change. So they have there place

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Tony Inspector
Santa Barbara, California
Tony Default
   

I've used several of the 'Amazon' transducers and found the same results, the outputs being too slow. Also found that at '0' pressure, or lets just say 'sea level atmospheric' or ambient pressures, they all read differently for calibration purposes. Not a problem for the waveform stuff, only for measuring actual pressures. It was suggested to me to use a bit more voltage as an input to improve…

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Alan Mechanic
Raleigh, North Carolina
Alan Default
 

I am no expert, but response time is the specification that will indicate how clean your waveforms look. I have built many, and considered selling a scope transducer interface, but consistent quality is hard to come buy on these cheap chinese transducers. The specifications are pretty much cut and pasted between all of the sellers, with almost all of them claiming a response time of less than or…

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