Delta/Pulse sensor... FLS vs NPS

I, recently, bought one of Nicholsons's Pulse Sensor. When I got it I threw it into to nearest tail pipe. Here are a few pics compared with a First Look Sensor:
Blue=FLS Red=NPS
The FLS seems to have 3x the amplitude. But, the NPS seems to have 3x the resolution.


FLS Vs NPS


NPS zoomed 3x.

I hesitate to share these next ones because I'm not sure what is going on. I need to do some more playing, before I reach a conclusion. I am interested, though, what anyone thinks about these.

The second tail pipe I put the NPS in, I saw a difference in the FLS. So, I added a WPS500. This is what I got:

Blue=First Look Sensor, Red=Nicholson's Pulse Sensor, Green=WPS500



This is with the WPS on top of the FLS vs NPS


This is with the WPS500 on top of the NPS vs FLS



Here, is all three stacked on top of each other.

This was the third tailpipe. I did this, as an after-thought, to see if there was a difference in the Banana and BNC signals...nope. It looked beautiful. This is the NPS Banana Plug and BNC vs FLS.

I think I found the problem. These waveforms should be a flat line. The first one is with the NPS connected using the Banana plugs. The second is with the NPS connected with a BNC cable. In each picture, I am slightly wiggling the cables where they connect to the NPS.

Here is the same car, Exhaust, cranking. Notice the NPS has, what looks like, an extra little exhaust pulse. I believe this is a bad connection inside the NPS?



Thoughts?

You sure it's not the cable?
The cable has more of a opportunity to fail vs the internal of the sensor.
If it was a sensor fault. It would show in the details you have already posted.
I'm thinking it's the cable. Do you have another BNC cable to use.
Also note my sensors I will warranty.

I made some home build ones real McGyver stuff I came to the conclusion the physical construction of the sensor has a huge impact on the signal, it is sensitive to the extent I don't think two identical sensors from the same manufacturer will give the exactly same waveform. In the end I bought a Ditex sensor but haven't used it much.