I found this on Amazon
https://www.amazon.com/gp/product/B0BHH9X1WG/ref=ox_sc_act_image_3?smid=A33KEXAIEXH1NV&psc=1

It will Detect Beta Rays and Gamma Rays and X Rays.

I would like something that can Detect all of those as well as Americium 241 can you help?

 

Alpha, beta, and gamma are different types of radiation. You cannot detected them with a single type of detector.
You cannot detect Am-241.

 

The claims for that amazon offering seem rather amazing. And the detection scheme leaves me at a loss for words. Butthe phrase "Snake Oil" comes to mind.

 

https://www.acq.osd.mil/ncbdp/narp/Radiation_Data/Radiation_Detection_and_Measurement.html

c. In demonstrations conducted in the laboratory, a sealed alpha source (Am‑241) was monitored with a well maintained AN/PDR-60 alpha probe and meter. Dust and water were sprinkled onto the source and changes noted. It was found that a drop of water, a heavy piece of lint, or a single thickness of tissue paper totally eliminated all readings. A light spray of water, comparable to a light dew, reduced readings by 40 to 50 percent. A layer of dust that was just visible on the shiny source had minimal effect on the count rate; however, a dust level that was only thick enough to show finger tracks reduced readings by 25 percent. These simple demonstrations reinforced the knowledge that detecting alpha particles in any but the most ideal situations is most problematic. The leaching or settling of contaminants into a grassy area or the dust stirred up by vehicular traffic on paved areas significantly decreases or eliminates alpha detection.

https://man.fas.org/dod-101/sys/land/an-pdr-77.htm

 

Detect them? They are almost constantly there at some level. Sure this isn't what you want?

And Fnirsi is a maker of some pretty good low end electronic testing equipment. You kinda get what you pay for though... It's not something you send in for regular certified calibration against a known standard by a metrology lab however.

 

Detect them? They are almost constantly there at some level. Sure this isn't what you want?
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It's unlikely to detect low energy alpha particles from Am-241.

 

Determining the source of radiation (other than from a lab sample) is another whole can of worms.

 

Alpha, beta, and gamma are different types of radiation. You cannot detected them with a single type of detector.

Geiger-Müller tubes detect all three types.

 

Am-241 is 59Kev(energy) and the Better Geiger measures down to 50Kev.
That's a pretty good alpha particle source. Likely much more than a typical smoke detection source.

https://www.bettergeiger.com/