The only one that can readily take a CCR sensor is the el cheapo - because the cells aren't fitted into a case at all and you can make whatever adapter you need. Pretty much every CCR (there are a couple exceptions) uses 9-13 mV sensors which work with the el cheapois there a possibility you may go ccr in the future? if so, it might be handy to have an analyzer that shares sensors so you have a use for the cells you rotate out