Searching nested properties array

[HareRee]

I have an item with nested properties. How would I go about search the properties of that nested array.

How can I search all items with sensor type "Other"

example item :
"properties":{
"sensors" : [
{
"type" : "abc,
"bands" : ["1","2","3"]
},
{
"type" : "Other",
"res" : 10
}
],
...
}

I've already tried using "a_contains" but, it doesn't seem to allow me to search on just 1 field in the nested object array.

Thanks!