Red Bull
Active Member
is this ok to use in hydro Hanna Instruments TDS Meter - TDS-EZ 0-9990 ppm - eBay (item 260288034078 end time Nov-14-08 20:20:17 PST) just checking before i purchase 1 thanks for any replies. 
ppm reader (TDS meter) ???
- Thread starter Red Bull
- Start date
caddy
Well-Known Member
Well, RIU has lots of threads about it, I almost feel bad doing another thread even though I've searched and read a lot here on it. I've just not decided on which one. There are decent ones in the 25-50 dollar range that go to 1999 PPM.
I guess im just researching which are most accurate, which come with calibration samples, etc.. That way i'm not just sticking this thing in water and taking its word for it. Need to do a controlled test in solution for an accurate reading. The trick is reading the auctions close enough to know which is which and comes with what, lol.
I guess im just researching which are most accurate, which come with calibration samples, etc.. That way i'm not just sticking this thing in water and taking its word for it. Need to do a controlled test in solution for an accurate reading. The trick is reading the auctions close enough to know which is which and comes with what, lol.
well, many disagree. they all lose their ability to sense correctly. with proper care i imagine 2 years could be achieved. a lot of people replace them more than that. so being that all sensors die pretty quickly and must be replaced, a combo doesnt make sense.
cheap individual replaceable units.
cheap individual replaceable units.
Bullethead21
Well-Known Member
A decent combo meter that does PPM, EC, TDS is going to run at 50 dollars or your wasting your money IMHO. These meteres Im talking about reatil for about 90 to 120 dollars but fleabay sells them for around 40 to 50 bucks.
This is a VERY important tool, right up there with LIGHTS! Thats how much you need a good meter. I would stay with name brand like below:
NUTRIENT TRUNCHEON METER HYDROPONICS WAND EC/PPM/CF H62
This is a decent quality meter that is very accurate and will last if you take care of it. They will eventually wear out but the way these are designed it will last a long time before any calibration issue will arrise or anything like that. They dont lose their ability to sense so to speak.
This is a VERY important tool, right up there with LIGHTS! Thats how much you need a good meter. I would stay with name brand like below:
NUTRIENT TRUNCHEON METER HYDROPONICS WAND EC/PPM/CF H62
This is a decent quality meter that is very accurate and will last if you take care of it. They will eventually wear out but the way these are designed it will last a long time before any calibration issue will arrise or anything like that. They dont lose their ability to sense so to speak.
Red Bull
Active Member
Thanks for replies what does this mean about the measurements of ppm they said - (Measurement Range: 0-9990 ppm. From 0-999 ppm, the resolution is in increments of 1ppm. From 1000 to 9990 ppm, the resolution is in increments of 10ppm, indicated by a blinking 'x10' image) 
you said-
you said-
caddy
Well-Known Member
Thanks for replies what does this mean about the measurements of ppm they said - (Measurement Range: 0-9990 ppm. From 0-999 ppm, the resolution is in increments of 1ppm. From 1000 to 9990 ppm, the resolution is in increments of 10ppm, indicated by a blinking 'x10' image)
0-999 PPM means it will not read further than 999 PPM in increments of 1 PPM integers. If you were to mix solutions and nutes up past that PPM amount you would not actually be able to do a reading with the small range meter. The ones that go to 1999 can commonly go by x10 where as the number being displayed should be multiplied by 10 to get the reading figure (up to 1999).
Example: A 0-1999 meter could show 130 as the read, you would then multiply that by 10, therefore 130 * 10 = 1300 PPM
This is how I understand it from using them years ago, if something has changed I would ask that a more advanced member please correct the thread. Regards.
caddy
Well-Known Member
If you have any links to that kind of price, anywhere, please PM it to me if you and the moderators do not mind. I've yet to see any decent combo meter go under $150 on ebay or other comparable stores, and go MUCH higher than that.
Much obliged.
GypsyBush
Well-Known Member
here is what I use...
and here is the cheapest I could find online...
HANNA GroCheck Combo Meter HI 981404N
works great!
Cheers...
and here is the cheapest I could find online...
HANNA GroCheck Combo Meter HI 981404N
works great!
Cheers...
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