Ion indicators are specialized fluorescent probes designed for real-time detection and quantification of specific intracellular ions. Our portfolio includes ratiometric and intensity-based probes for calcium (Ca²⁺), zinc (Zn²⁺), magnesium (Mg²⁺), sodium (Na⁺), and potassium (K⁺), as well as pH sensors and membrane potential dyes. These indicators undergo significant fluorescence changes—such as shifts in excitation/emission wavelengths or intensity—upon ion binding, enabling dynamic monitoring of ionic fluxes in live cells. Essential for studying cellular signaling, neuronal activity, and ion channel function, they are optimized for applications in flow cytometry, high-content screening, and confocal microscopy with minimal cellular toxicity.