How accurate are these? Pinpoint monitors

[oonycxwilloo]

There are two things I would like to ask on this thread

First:
Picked up a salinity monitor (pinpoint) a while back, but it wasn't calibrated. isgon26 finally got me the calibration fluid. I have tried calibrating it but the meter never stays constant. It usually jumps .03 constantly. Is this normal or did I purchase a defective unit?

Second:
Before I picked up my shipment today, went to jcolbe and picked up a temperature monitor (pinpoint). I have been using those inaccurate digital thermometers from Corallife. The coralife thermometer reads 78 degrees or so but when I hooked up the pinpoint temperature monitor it read 73 degrees and this unit was listed as brand new. I don't think there is a way to calibrate these right?

 

[pweissma]

Your second point, 5 degree diff is a a lot. Your Coralife thermometer could be way off. Can you get a third opinion?
I don't have this monitor but I pulled up the users manual http://www.f3images.com/IMD/UserManuals/AM1131.pdf
and there doesn't seem to be a way to calibrate it. 32 F is in the range of monitor so you test with an ice bath. The temp of the water should be close to 32.

 

[oonycxwilloo]

Yes, so that means when I first hooked up my chiller, the coralife thermometer read 74, so I was really at 69 degrees?!?!?

Anyone else have the pinpoint temp monitor?

 

[mray]

Will, read the reviews on MarineDepot.com. I think in this case your coralife thermometer might be more accurate. Buy one of the cheap glass thermometers if you want to double check any of your temperature reading equipment.

 

[oonycxwilloo]

Do you mean the pinpoint?

I am reading the reviews for the Coralife and they are saying it is inaccurate.

As for the pinpoint, no complaints

 

[mray]

Both of them have people complaining about inaccuracy. I found buy one of those cheap glass thermometers to be sure. They are highly accurate. I've used them to check my ranco and apex.

 

[oonycxwilloo]

will do. I will do that today.

 

[mray]

Also, marine depot only shows the high ratings on the item page. Click more reviews for all of the reviews.

 

[oonycxwilloo]

Yea I was just doing that.. Thanks man.. Now I need some feedback on my first question

 

[mray]

It's a salinity monitor though. 1.026 +/- .03

 

[ming]

Sorry
mis-read it.. never had a salinity monitor but .03 off seems high

 

[BIG L A]

Will I have the same coralife temp probe but I use it as my second opinion... If both of them read the same then I feel like Im okay but if one is way different then the other then I have a problem and get a third party...

 

[oonycxwilloo]

Yea, Now I just have to get someone bring something over and test with mine also.

Now its the salinity monitor