Ppm readings

[Czechitout]

High again,I’ve been on the canna website grow guide,in the drop down menus you can select which ppm reading you require,
I didn’t know there were different types!,
I was given a pen from Amazon to measure ppm but don’t know which reading to follow on the site.
1. Truncheon
2. Hanna
3 Eutech?
I know the pens not great but better than nothing right?

Any advise? Thanks Steve

[Treetrunk]

If it's one of the cheap Chinese meters it will be Hanna scale.
Can you post a picture of the meter you use?

[Czechitout]

High can’t post pictures yet,but. A link https://images-na.ssl-images-amazon.com ... L._AC_.jpg
Yeah it is cheap Chinese

[Treetrunk]

Yes that's the type I mean
Use the Hanna scale and replace the meter every 12/18 months.

[Czechitout]

Yes that's the type I mean
Use the Hanna scale and replace the meter every 12/18 months.

Thanks I though so,the other readings are hugely different to mine on hanna, nice to know for sure though.