Manwithnofish

My LifeGard Big Digital Temp Alert didn't last 6 months!

Can anyone recommend a good temp monitor system?

Nevermore

That's no good! I have that same digital thermometer, I hope mine's not going to break. I've had mine probably 6 months.

Manwithnofish

Well, it's unfair to say it's broke. Actually the room temperature still works, just the one in the tank broke.

Complexity

Honestly, after trying several digital thermometers, the best one I have found is the old fashioned, suction to the glass, red liquid, glass encased kinds.

I gave up on digital ones when I tested 7 of them all at once, and no two would give me the same reading (some were off by over 8° from each other!). Some simply did not work, others got stuck at certain temps, some would "rise and fall" over and over again, and in the end, I couldn't figure out which one(s) were accurate enough to actually use. I tossed them all.

I also discovered that digital thermometers are slower to respond to temperature changes which I found frustrating during water changes.

If you get another digital thermometer, check its rated accuracy. Some are as much as ±2° which is a large range. For example, if the thermometer reads 78°, is that the actual water temp, or is the temp reading +2 (water is actually 76°) or -2 (water is actually 80°). From 76° - 80° is a big difference.

Manwithnofish

Oh. That is sad.

I have read about the Ranco themocontroller which are suppose to be very accurate. If I just plug the heater into it and set the Ranco, folks say the temp will stay within 1 deg. I think it has a digital display of the currrent temp. Is that a better way to go?

rodrigaj

I buy only calibrated thermometers from lab supply places such as VWR.

http://www.vwrsp.com/catalog/product...2344-914&inM=1

Complexity

"Accuracy: ±1°C." This is much better! The thermometer's a bit pricey, but I guess you get what you pay for.

Manwithnofish

That's the exact same thing that I bought that broke...just a minor change in the name.

bartoli

"Tom Aquarium Temperature Alert" gives the same reading as glass thermometer. But it displays only in Fahrenheit. I got mine a long time ago and it continues to work.

http://www.petsmart.com/product/inde...ductId=2755306

Nevermore

It's not accurate though. I found it gave me very different readings than my Lifegard Big Digital Thermometer. I finally ordered an Accu-Safe thermometer from Avogodro's Lab Supply on Ebay, which has been calibrated and verified to be accurate within one scale division. I use that when I want to REALLY know what the temperature is, all the other thermometers are off. Tom's Aquarium Temp Alert was off by 4 degrees. Find an accurate glass thermometer and check your digital thermometer, good chance it will be off.