TDS measurement Where to buy

[Osama]

I need to check the quaility of my water before and after my RO/DI unit. What is cheapest way to do that and if I need to buy an instrument where can I get a good price for one. Thanks for all input

 

[reefNewbie]

well, if you need a tds meter get it from ebay. There are a ton of them on there for like 19.99

 

[ChrisRD]

I have one of these.

Works good.

 

[Osama]

wolfman. Where do you recommend I get one? What is the expected price for a new one. What values indicate good water vs time to change membranes..

 

[ChrisRD]

wolfman. Where do you recommend I get one? What is the expected price for a new one.

Click on the link in my first post.

What values indicate good water vs time to change membranes..

If your RO/DI unit is functioning well, you should have 0 TDS product water. Once the DI catridge starts going you'll start to see levels creep up.

You can see how well your membrane is working by testing your tap water with the meter, and then by taking another reading after the membrane (but before the DI) for comparison.

If you've got good pressure and everything is working normally you'll probably get over 90% rejection (depending on what's in your water).

 

[AvonleaPA]

I'll 2nd the vote for eBay. Look for the merchant Sun Stone Herbals (or something close to that). He sell's the Hanna TDS-1 for $19.99. I have one from him and am pleased. Shipping was reasonable and the item was promptly shipped.

Just do a search for TDS Meter, and you'll see his listing come up.

 

[Osama]

Thanks to All I plan on getting a Hanna through ebbay