TDS Meter

[ffighter17]

I hvae a HM Digital Dual Inline TDS Meter DM-1, I have had it for several years now. How often should this meter be replaced? From what I am understanding you cant really calibrate it​

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Thanks​

 

[Reef.]

I hvae a HM Digital Dual Inline TDS Meter DM-1, I have had it for several years now. How often should this meter be replaced? From what I am understanding you cant really calibrate it​

​

Thanks​

check a known source, ask a friend for a sample of rodi water and test that, or buy some distilled water and test that, even some bought distilled water can show tds though, you could always buy a 2nd meter, if both show the same reading then you know you are good, they are cheap enough.

 

[X-37B]

I hvae a HM Digital Dual Inline TDS Meter DM-1, I have had it for several years now. How often should this meter be replaced? From what I am understanding you cant really calibrate it​

​

Thanks​

Is this on an ro/di unit? If it is you dont calibate it.
You can/should use a hand held meter to check your effluent. Its the only way to verify that your water is actually zero.
I have had 1 tds meter for 20 years and its still accurate.

 

[Reef.]

Is this on an ro/di unit? If it is you dont calibate it.
You can/should use a hand held meter to check your effluent. Its the only way to verify that your water is actually zero.
I have had 1 tds meter for 20 years and its still accurate.

Why do you say you can’t use an inline tds meter? Of course you can, I personally don’t t but nothing wrong with inline, I just find a hand handle is easier to check multiple points on the system, and also they are easier to check they are still reading zero correctly.