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#1
08-06-2009, 11:01 AM
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thermometer question
i have a question about thermeters .i had a small digital one i didnt like and when and bought a larger one today .i have both in tank right now and probes in same location but they read 3 degrees different .one says tank is 77.5 other says 80.6 .which one should i belive?
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#2
08-06-2009, 12:05 PM
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One is the air temperature and one is the water temperature. I believe the temp with OUT beside it is the water temperature, and IN the air temperature (but it has been a while since I owned one).
Check the instructions if you still have them (assuming they come with instructions). Quote:
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I'm out. 
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#3
08-06-2009, 12:14 PM
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Borrow a third thermometer or take your two to the LFS and compare. If the one you like is out by 3 degrees then you can still continue to use it as long as you remember the display is out by three degrees and add/subtract for a true result.
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#4
08-06-2009, 12:50 PM
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Seems like the vast majority of digital thermometers are "off" a bit.....double check your temp with an old fashioned glass thermometer.
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260g mixed reef, 105g sump, water blaster 7000 return, Bubble King SM 300 skimmer, Aqua Controller Jr, 4 radions, 3 Tunze 6055s,1 tunze 6065, 2 Vortech MP40s, Vortech MP20, Tunze ATO, GHL SA2 doser, 2 TLF reactors (1 carbon, 1 rowa). http://www.canreef.com/vbulletin/showthread.php?t=50034 . Tank Video here http://www.vimeo.com/2304609 and here http://www.vimeo.com/16591694
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#5
08-06-2009, 01:58 PM
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I second the motion for using a glass thermometer.... Had problems with the digital meter I started with.
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#6
08-06-2009, 02:35 PM
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Hehe, I never trust just one thermometer.. I have three, two different styles of glass and a digital one. All three are slightly different. I take an average of the three
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