ReferenceError: node is not defined

[Colin]

I see that node ( node-red-contrib-mi-sensors ) is from the github repository https://github.com/yaming116/node-red-contrib-mi-devices which is a fork of https://github.com/pierrecle/node-red-contrib-mi-devices which has this issue against it: https://github.com/pierrecle/node-red-contrib-mi-devices/issues/42
That issue suggests a workaround which may be helpful to you.