Gravity: Analog Electrical Conductivity Sensor / Meter(K=10)

Jargon buster

Plain-language definitions for the technical terms used above.

AC excitation

AC excitation means the probe is driven with an alternating electrical signal rather than a steady DC signal. This matters for conductivity probes because it helps reduce electrode polarisation, improving measurement stability and probe life.

BNC connector

A twist-lock connector commonly used for probes, test equipment, and shielded signal cables. For pH and conductivity sensors, a BNC connector makes it easier to attach or replace electrodes without soldering.

cell constant

The cell constant (K) describes the geometry of a conductivity probe and is used to convert the raw electrical measurement into a conductivity value. Different values suit different ranges, with lower constants (such as K=0.1) suited to very pure or low-conductivity solutions and higher ones (such as K=1 or K=10) to higher-conductivity solutions, so it helps you judge whether a probe matches the conductivity levels you expect to measure.

DS18B20

The DS18B20 is a common digital temperature sensor, often supplied in a waterproof stainless-steel probe, that sends its readings to a microcontroller over a 1-Wire connection. It is a typical choice for adding temperature data to environmental or water-monitoring projects.

Gravity

Gravity is DFRobot’s plug-in connector system for sensors, motors and modules, using standard cables to reduce loose jumper wiring. It matters because Gravity-compatible parts can connect directly to these ports, while non-Gravity parts may need adapters or manual wiring.

Temperature compensation

Temperature compensation is when a sensor or instrument adjusts its readings to reduce errors caused by changes in temperature. This matters because a sensor's raw output often drifts as conditions warm or cool, so compensation keeps readings more consistent and accurate over time.