Analog pH Sensor Kit for Arduino, BNC Probe, 0-14 pH Range

Measuring pH accurately requires a dedicated glass-electrode probe rather than any kind of generic electrical sensor, since pH measurement relies on detecting the specific voltage generated by hydrogen ion activity across a specialized glass membrane. This kit pairs exactly that kind of probe, terminated in a standard BNC connector, with a separate signal-conditioning circuit board that amplifies and cleans up the probe's tiny voltage signal into something an Arduino's analog input can read reliably.

Measurement range covers the full practical pH scale from 0 to 14, with accuracy rated at 0.01 pH, genuinely precise enough for serious water-quality monitoring, aquarium chemistry tracking, or hydroponics nutrient management, not just a rough approximation. Response time is rated at about 1 minute, reflecting the inherent settling behavior of glass pH electrodes generally rather than a limitation specific to this particular board. The probe connects to the signal board via a 75cm cable terminated in the BNC connector, giving reasonable placement flexibility for probing a tank, reservoir, or sample container positioned away from the electronics.

The signal conditioning board itself connects to an Arduino through a PH2.0 connector wired to a standard analog input pin, with a power LED indicator confirming the board is receiving power. Measuring temperature range for the probe itself is rated 0 to 50C, suiting most indoor aquarium, hydroponics, and general water-testing temperature ranges without needing special handling.

Builders working on an aquarium water-quality monitor, a hydroponics or aquaponics nutrient-balance system, a pool or spa pH tracker, or any project needing genuinely accurate pH measurement rather than a rough estimate will find this kit a well-proven, properly-calibrated starting point built around real glass-electrode pH sensing rather than an approximation.