#!/usr/bin/bash

FAN_RPMS=()
ICON_FAN=""

IFS=$'\n'
for i in $(sensors | grep RPM); do
    RPM=$(echo $i | awk '{print $2}')
    if [ "$RPM" -ne "0" ]; then
        FAN_RPMS+="$ICON_FAN $RPM "
    fi
done

echo "${FAN_RPMS[@]}"