Cheap Blue TDS meter is what scale?

I never thought about it really, bit I've still been using my tea meter from like 2016-17 and it's one of the blue ones with the leather case and the small window in it.
I can't even find the same one online anymore. But I was just curious if anyone knows what scale it is actually set on? And is it showing a lower ppm than what it would actually be with say a bluelab or Hanna? I don't use it a ton since I've got my regimen pretty dialed in. But was really wondering this.

Im using a newer meter now, but iirc its 500 scale. When I used it, I just used ec mode since I wasnt sure either.

Funny you ask that I was wondering about that with my hm digital one ive had for maybe 5 years and am having trouble finding the info

TravisG13 said:

Funny you ask that I was wondering about that with my hm digital one ive had for maybe 5 years and am having trouble finding the info

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Never hears of HM digital. Costly?

Airwalker16 said:

Never hears of HM digital. Costly?

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I don't remember what I paid but I doubt it, probably was on the cheaper end.