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Special 10% price match offer for this Neptune product! If you find a lower price in Canada, we'll match it plus give you an extra 10% of the difference. To qualify, the competitor's price must be less than a 2% difference, and the item must be in stock. Refer to ourprice match policyfor complete details. Shop confidently with us!
What's the difference between double junction and single junction probes?
Single junction probes put the reference electrode in direct contact with aquarium water. Over time, the junction will slowly leak aquarium water into the electrolyte which changes the accuracy of the probe and requires more frequent calibrations.
Double junction probes place a second vessel inside the main electrolyte with a second internal junction. The means that even when the aquarium water eventually begins to make its way in the first compartment, it still has to go through the second junction to contaminate the electrolyte surrounding the reference electrode.
