Replacement temp/hygro sensor for WMR180 - Protocol 3.0

Hi,

my temp/hygro sensor for my WMR180 has given up the ghost and I’m trying to find a replacement but am confused.

In the manual it states that any sensor with the 3.0 logo (https://www.screencast.com/t/sKwMHU9iXX) will work with this device. But I’ve been advised that the THGN801 THERMO/HYGRO sensor https://www.weathershop.co.uk/shop/accessories/sensors/oregon-scientific-thgn801-sensor, despite having this logo, doesn’t work with the 180 and only the WMR100N & WMR200.

What is the story with Protocol 3.0 and compatible sensors? Are there 2 different protocols?

Confused.