Long Body pH Electrode with BNC Socket Probe 300cm Cable 0-14pH for pH Meter, pH Controller pH Device Economical Sensor

Used to replace an old probe for my bluelab guardian. Calibrated without issue and is working at the same level of accuracy as the original probe.edit: Been using for about a year now, and it's still functioning perfectly. Just bought another for a separate meter.

Replaced a bluelab probe with this, works great. It's accurate and has been checked with other meters as well as calibration fluid. Awesome price.

These were attempted to be used on a Bluelab gaurdian and monitor. Calibrated each twice per instructions while also calibrating other meters.Meters calibrated fine, but this garbage never got closer being .3 and .6 off no matter what I did.Contacted factory. What a joke! I sent these clownss a youtube video showing exactly what their garbage was doing while also showing I was using a calibrated meter to check their probes. They now say they need to contact "engineering" to see what they want to do. They were probably laughing while they typed.Eventually THEY SUGGESTED I return them to amazon. Amazon shouldn't even sell this garbage. Returned and bought a Bluelab probe like I should have.

I like the fact that it fits my blulab ph meter. From 2001 none the less. I've yet tried to calibrate the probe, but I suspect I won't have an issue.The probe itself looks well built, and 64.00 USD cheaper than the replacement blulab probe. (3 times)

Delivered better than I expected! I have 6 different pricey pH units. My main ones are the bluelab guardian. The pH probes made by bluelab are $80-100 each, and are supposed to last 18months….but it’s more like 4-6 months….these not only work perfectly with the bluelab guardian, but they are 80% cheaper …AND they were actually slightly more accurate than the bluelab ones after calibrating. Stop wasting money on Bluelab replacement probes and just buy a ton of these.

It works!

so far so good. this was purchased as a replacement for my ph controller

Good product with great price，Since the ph electrode of my meter got broken, I bought this one right away and was amazed of its price. This holds calibrations well, gives accurate and stable readings. Works perfectly with my own meter. I am so happy for choosing this electrode!