looking to buy a TDS meter

I want to test my tap water.

I am looking at this particular one on eBay
http://cgi.ebay.com/EC-TDS-CF-Meter-Aquarium-Swimming-Pool-Spa-Water-Tester_W0QQitemZ380109524752QQcmdZViewItemQQptZMeters_Testers_Probes?hash=item380109524752&_trksid=p3911.c0.m14&_trkparms=72%3A1205|66%3A2|65%3A12|39%3A1|240%3A1318|301%3A1|293%3A1|294%3A50

because i have the sister meter for pH and like it.

Is this a descent TDS meter? Anyone have one?

specs:
Specifications

• • Measuring Range: 0 - 1990 ppm (mg/l)
  • Resolution: 10 ppm<- what does that mean?
    
  • Accuracy (@20°C/68°F): ±2 % F.S<-how does this work for my 80°F tank?
    
  • Calibration: manual, 1 point
  • Temperature Compensation: Automatic from 41° – 122°F (5° – 50°C)
  • Batteries: 4×1.5V alkaline
  • Life: approx.150 hours of use
  • Dimensions: 152×30×21 mm (5.9×1.2×0.8")
  • Weight: 53g

Thanks

 

^bump

 

I don't have one of those but I would recommend this one. It's a couple bucks more but you get 2 TDS meters built in so you can test your input water to your RO/DI as well as your output from the unit to make sure that your filters are still working and don't need to be changed, it affixes easily to the RO unit and takes about 5 minutes to install.

DM-1: IN-LINE DUAL TDS MONITOR Bulk Reef Supply

 

Thanks screw tape.

I'm just looking for a more mobile one that I can test my tap water with. I've gotten real curious as to what my tap reads.

 

I was gonna say +1 to the dual TDS meter, but thats not what your looking for... You will be surprised what you find when you get one! lol

 

This is the one I bought. We want to aim for 1ppm TDS ultimately, so even at 2%, if we are seeing 10ppm on the meter, it may be 9.8-10.2ppm which is fine. Having one of these REALLY helps determine when you need to change your RO filters, which helps save money in the long run.

Edit: Wooops, forgot the link
http://cgi.ebay.com/TDS-Water-Quali...5|66:2|65:12|39:1|240:1318|301:0|293:1|294:50

 

It will read your tap water going into the RO unit. I have a hand held one but use my inline one more.

 

Resolution: 10 ppm<- what does that mean? This means it reads in increments of 10 (10 20 30) not 10 11 12

Accuracy (@20°C/68°F): ±2 % F.S<-how does this work for my 80[/SIZE]°F tank?
It has automatic temp compensation--means its calibrated at @20C/68F but it will automatically adjust the reading within 41 to 122F, so you can use your 80 degree water no problem

Hope that helps explain a little bit.

 

This is the one I just picked up. Works great.

TDS-3 Handheld TDS Meter Tester HM Digital BRS RO/DI - eBay (item 360132650019 end time Feb-20-09 09:28:51 PST)

 

So does that mean if my TDS is actually, say, 4, then I will get a reading of either 0 or 10?


If my TDS is 32 the reading will be 30 or 40?



That's kind of crappy. Is that about as good as it gets for these pen style meters?