Can't comment on the first of these but YSI Exo2 is good for one 3-5 yr programme. After that costs to recalibrate are prohibitive, and we have now moved over to Aquatrolls. 🧪
Thank you! I had not heard of Aquatrolls, I will look into them. We have a 3-5 year need for a sonde, but we are hoping to continue to use it after this project ends. Thank you for your input!
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