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I have some temperature irregularities. That's always been true for me as I run several units. Never had 2 give the same temp even if the same brand. Here is one record.
Lowrance 66.9
Vexilar 66.5
Garmin 63.98
Fish Hawk 66.1
It really doesn't matter that much right now, but earlier in the spring it can be of help to know the precise temperature. Any ideas?
If you want to have exact temperature measure the water temp and use temp offset to set the units. Most units I've seen have the temp offset feature.
I see this also between my Garmin and Humminbird. On the Garmin there is a setting to adjust temp variances. No actually figuring out which one is truly correct........no idea
I guess this shouldn't bug me, but it does. Read on the net that the way to calibrate a thermometer is to take a bucket of ice, add water, let it sit 10 minutes and check temp. Should read 32. I really don't think that will solve this but I'm doing that now. I don't think the water would be precisely 32 either. Calibrated at 32 doesn't necessarily mean accurate when reading 60-80. Oh well, when someone asks me what is the water temp I can always answer one of cold, warm, or hot. The Fish Hawk should be close, for what it costs and that's all it does.
Ok. The Fish Hawk is reasonably accurate. 33 degrees in ice water. Vexilar next. Lowrance and Garmin bringing up the rear. I need to calibrate the Garmin about 2.5 degrees warmer. Big, big surprise to me was just how long it took all of them to settle on what temperature the cold water was and then it seemed like forever before they came back to air temperature once the cold water was removed. I speculate that the transducer housing slows the response to temperature changes. None of the units give quick accurate readings for significant changes in temperature. The Fish Hawk does give accurate instant readings. The Vexilar nearly does. Both have an exposed sensor unaffected by a housing. I'm sure the Garmin and Lowrance would both give instant readings if connected to a sensor designed for that purpose instead of a sensor in the transducer.