iOS,getting magnetic field values in milli gauss

iOS,getting magnetic field values in milli gauss

I am using tesla meter sample code by apple to detect magnetic field in my
app,it is giving readings in micro tesla,its values are normally between
25-60 micro tesla,but i want readings in milli gauss,i want to convert
these values in milli gauss using expression 1 microtesla = 10 milli
gauss.but the problem is my values gets very high like 400-800 milli gauss
normally,But the other EMF DETECTORs(K-2 EMF DETECTOR)shows value vary low
in milli gauss i.e 1.5-10 milli gauss.Am i doing anything wrong.any help
would be appreciable.