How Do I Search for Sensors/Channels Without Limits

I'm looking into how I can run a programmatic report on which sensors/channels don't have limits set up. We have 16,000+ sensors, so it has to be programmatic. I planned on using the API but it seems to have a major flaw. Some of the sensors such as "SSH Disk Free" have default limits on the Free Space channels. 25% for warning and 10% for error. These numbers however, are not in the properties of the channel. This seems unintended. If there are defaults for a channel, it should enable the limits (change limitmode) and set the properties that I would set (limitmaxerror, limitmaxwarning).

If I run this query on an SSH Disk Free sensor

https://prtghost/api/getobjectproperty.htm?id=53730&subtype=channel&show=nohtmlencode&username=username&passhash=passhash&name=limitminwarning&subid=4

Returns:

<?xml version="1.0" encoding="UTF-8" ?>
<prtg>
	<version>21.2.67.1562+</version>
	<result></result>
</prtg>

This goes for all limit properties (limitmaxerror, limitmaxwarning, limitminwarning, limitminerror). limitmode returns 0, or disabled.

Is there any other way I can create a list of sensors / channels without limits?

api limits ssh-disk-free