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Can I use X sensor?

A project log for CarbOnBal

Arduino based carburetor and throttle body balancer / synchronizer

dennisdennis 02/16/2020 at 18:073 Comments

I just got an interesting question.

Can I use X sensor?

The answer depends on three basic properties;

1  you need a 1 Bar sensor for best accuracy

2 it must operate at 5V and produce a voltage swinging from as low as possible to as close as possible to 5V for ultimate accuracy.

3 It needs a 3 pin connector (5V, Ground, signal (in any order, as long as you know which pin goes where)

We are really looking for a MAP sensor that was designed to work at 1BAR. That means it was originally intended for use in a vehicle without a turbo! This is important because a turbo sensor may go up to three Bar or more and we only need to measure the carburettor or throttle body vacuum (the values below 1 Bar). Going to three reduces the accuracy by a factor of 3 (almost). It would still work and probably still be accurate enough for a decent tune-up, but insane accuracy is one of the main attractions of CarbOnBal!

It needs to be powered by 5V because that is what our Arduino works with, using a 3.3V sensor would require an extra power supply and a voltage reference, that is more external components and a few lines of programming. It can be done but I can't support stuff I can't test myself.

There are some crazy sensor designs out there with many pins. I have no idea how to hook them up, and they probably require more external components to use. Stay away from these at all costs. There could be designs that are usable, but you are on your own if you decide to use one of those units.

Discussions

dennis wrote 03/02/2020 at 15:00 point

The two parts recommended in the parts list are the ones I have verified from their respective datasheets, and later in practice by several project builders. Of course there are a lot more floating around that would be more or less suitable, but, as you found out, the documentation is mostly lacking.

  Are you sure? yes | no

Walt wrote 02/17/2020 at 06:54 point

Here is a list based on google searches and sales that are rated at 1 bar and are all interchangeable.  Prices run from $4.49 to $37.04 and beyond.

213259

213351

213351

213361

213796

216451

5S1153

5S2398

2134434

7472328

09359409

1580750

9359409

16212460

12575837

12614970

12614973

16187556

16249939

19236265

21024034

62630045

89052738

8093594090

8162124600

8162499390

8126149700

8126149730

8161875560

213-259

213-351

213-361

213-796

213-4434

AS60

EC1636

EC1686

MP103

PS1000011B1

PS10002

PS10000-11B1

SU1176

  Are you sure? yes | no

Walt wrote 02/16/2020 at 21:19 point

This is good to know about getting the correct bar and voltage rated sensor. How do you determine the bar and the voltage rating? I have found a lot of sensors on Amazon and Ebay but those ratings are not shown. Are there certain part numbers you have worked with that you know are the correct ratings?

  Are you sure? yes | no