TEKCOPLUS 0.00~14.00PH Probe Electrode with BNC Cable for Water,Pool,Hydroponics,Calibration Powder,Aquarium (300 cm Electrode)

I am currently using these for my Neptune Apex unit for a reef tank. They both were accurately calibrated out of the box when they arrived. As a precaution, I decided to do a 2 point calibration anyway. I have been using them for the past 6 weeks to give an honest review. I have purposely not done another calibration so I can document when they start to drift. I normally would want to calibrate every 2-3 weeks as a precaution. I am very pleased with how they have been performing. I would order with confidence again. In the screenshot I shared you can see the variance in the two probes. 0.05 is about the threshold I would say is time to do a calibration. They are starting to drift in my opinion. But they are still very accurate. Just not as precise. They are quick to respond to dosage chemicals which is important if you are controlling chemical pumps based on pH.

I replaced my Neptune apex probe with this about a year ago and it’s been solid, I’ve only calibrated it to make sure it was still giving accurate readings.

Ottimo, fa il suo lavoro

Perfekt mit "3-Buchstaben-Kalibrierset" zu kalibrieren. Wunderbar und kostensparend. 3,5 Wochen vom Fachhandel erworbene Diode für viel mehr Geld ging kaputt und hat falsche Werte gezeigt, kalibrieren mit 4,0 ging nicht, Meldung "Sensor defekt" und Händler gibt nach 3,5 Wochen kein Geld zurück???? Ich liebe Amazon, sooo! Der Händler hat nächste Woche erst Ersatz und ich habe nach 2 Tagen bereits hochwertigen Ersatz im Aquarium. Top. Klasse und bin zufrieden. Definitiv Kaufempfehlung und auch passend an "3-Buchstaben-Co2-PC". Toll dass es Qualität noch in dem Preissegment gibt, wo Namhafte null Service bieten.

Buen producto, llego en la fecha planificada y funciona correctamente.