Where can I purchase JUST the Geophone?

I purchased the standalone RS4D board because I already had a SM-24 Geophone Element. It looks like this Geophone model isn’t supported by your servers for certain features so I would like to purchase the RGI-20DX 4.5 Hz, 395 Ohm, Vertical Racotech Geophone but there is no option on your website to purchase the geophone by itself. Can I arrange to purchase the standalone geophone?

Sure, we can make that happen! I will message you directly about this.