diff --git a/Datasheets/MQ-135.pdf b/Datasheets/MQ-135.pdf
deleted file mode 100644
index 37aadac..0000000
Binary files a/Datasheets/MQ-135.pdf and /dev/null differ
diff --git a/Datasheets/MQ131 - sensorsportal.pdf b/Datasheets/MQ131 - sensorsportal.pdf
new file mode 100644
index 0000000..c6412a5
Binary files /dev/null and b/Datasheets/MQ131 - sensorsportal.pdf differ
diff --git a/Datasheets/MQ135 - Hanwei.pdf b/Datasheets/MQ135 - Hanwei.pdf
new file mode 100644
index 0000000..d30345a
Binary files /dev/null and b/Datasheets/MQ135 - Hanwei.pdf differ
diff --git a/Datasheets/MQ2.pdf b/Datasheets/MQ2 - Pololulu.pdf
similarity index 100%
rename from Datasheets/MQ2.pdf
rename to Datasheets/MQ2 - Pololulu.pdf
diff --git a/Datasheets/MQ3 - Sparkfun.pdf b/Datasheets/MQ3 - Sparkfun.pdf
new file mode 100644
index 0000000..cebb56b
Binary files /dev/null and b/Datasheets/MQ3 - Sparkfun.pdf differ
diff --git a/Datasheets/MQ3.pdf b/Datasheets/MQ3.pdf
deleted file mode 100644
index 95c2c53..0000000
Binary files a/Datasheets/MQ3.pdf and /dev/null differ
diff --git a/Datasheets/MQ303A - Hanwei.pdf b/Datasheets/MQ303A - Hanwei.pdf
new file mode 100644
index 0000000..90b28cc
Binary files /dev/null and b/Datasheets/MQ303A - Hanwei.pdf differ
diff --git a/Datasheets/MQ309A - Hanwei.pdf b/Datasheets/MQ309A - Hanwei.pdf
new file mode 100644
index 0000000..5a7f8ad
Binary files /dev/null and b/Datasheets/MQ309A - Hanwei.pdf differ
diff --git a/Datasheets/MQ4 - Sparkfun.pdf b/Datasheets/MQ4 - Sparkfun.pdf
new file mode 100644
index 0000000..1bda875
Binary files /dev/null and b/Datasheets/MQ4 - Sparkfun.pdf differ
diff --git a/Datasheets/MQ4.pdf b/Datasheets/MQ4.pdf
deleted file mode 100644
index 14ae6d1..0000000
Binary files a/Datasheets/MQ4.pdf and /dev/null differ
diff --git a/Datasheets/MQ-5.pdf b/Datasheets/MQ5 - Parallax.pdf
similarity index 100%
rename from Datasheets/MQ-5.pdf
rename to Datasheets/MQ5 - Parallax.pdf
diff --git a/Datasheets/MQ6 - Sparkfun.pdf b/Datasheets/MQ6 - Sparkfun.pdf
new file mode 100644
index 0000000..e1846f3
Binary files /dev/null and b/Datasheets/MQ6 - Sparkfun.pdf differ
diff --git a/Datasheets/MQ6.pdf b/Datasheets/MQ6.pdf
deleted file mode 100644
index 67a1028..0000000
Binary files a/Datasheets/MQ6.pdf and /dev/null differ
diff --git a/Datasheets/MQ7 - Sparkfun.pdf b/Datasheets/MQ7 - Sparkfun.pdf
new file mode 100644
index 0000000..6066c2f
Binary files /dev/null and b/Datasheets/MQ7 - Sparkfun.pdf differ
diff --git a/Datasheets/MQ7.pdf b/Datasheets/MQ7.pdf
deleted file mode 100644
index 86e0039..0000000
Binary files a/Datasheets/MQ7.pdf and /dev/null differ
diff --git a/Datasheets/MQ-8.pdf b/Datasheets/MQ8 - Sparkfun.pdf
similarity index 100%
rename from Datasheets/MQ-8.pdf
rename to Datasheets/MQ8 - Sparkfun.pdf
diff --git a/Datasheets/MQ9.pdf b/Datasheets/MQ9 - Hanwei.pdf
similarity index 100%
rename from Datasheets/MQ9.pdf
rename to Datasheets/MQ9 - Hanwei.pdf