Digital PH/TDS/EC Meters - Combo or Separate Pens

Is there a good reason to purchase separate meters or are the combo ones just as good? Are the combo pens as accurate as buying individual meters? What is a good one to buy? Thanks in advance!!!!

Hi there, i recently bought a combo meter, it does EC, CF and PPM, i also have a seperate PH meter, if i could i would rather have them all in one, its much easier than having 6 or 7 of these things and having to take the lid off and put it back on then get the next one, with a combo meter you just press a button and its ready to test the next thing you wish to test.

C6

Right on man, thanks for the reply. I went with a combo meter myself, I got this one:

HANNA Meter, PH/Ec/Tds/Temp HI98129




Seem Like a pretty decent one, I bought it with my companies Grainger account, $224.50
http://www.grainger.com/Grainger/HANNA-PHECTDSTemp-Meter-3NB21

Wow, holy crap thats expensive, this is the one i bought slightly cheaper, actually its the cheapest i could get, it works fine i would like a 7 in 1 but hey I'm on a tight budget so.

http://cgi.ebay.com.au/Waterproof-Digital-EC-CF-TDS-Meter-Tester-19990-ppm-/200537015091?pt=AU_Gadgets&hash=item2eb0f00333

I got an all in one, does EVERTYHIGN, PPM EC CF TDS TEMP AND PH

http://www.oasishydroponics.co.uk/product/Essentials_Trident_EC|pH|Temperature_Meter_108004

trouble is, when one part of it breaks like mine did (ec reading) it fucked the whole thing up, so off to the shop to buy individual ones. Temps i have a thermomiter, ec,ppm,tds - bluelab wand and a £40 ph tester. csending the 3-in-1 wand back, takes 4-6 weeks for manufacturer to get it back!!!!

i have that hanna combo also,works great