YSI pH100A

Say goodbye to switching sensors—this single device measures three key parameters:

pH
mV/ORP
Temperature

The YSI pH100A is a reliable, handheld pH meter designed for spot sampling in aquaculture, wastewater, surface water, and environmental monitoring. Part of YSI’s trusted EcoSense range, this instrument offers precise measurements of pH, mV (ORP), and temperature in a rugged, waterproof design that’s ideal for field use.

Engineered for simplicity and durability, the pH100A features one-handed operation, making it perfect for technicians and researchers working in dynamic environments. Its IP67 waterproof housing, internal buffer recognition, and auto/manual temperature compensation ensure consistent and accurate readings in all conditions.

The meter supports electrode offset recognition, auto lock mode to hold stable readings, and displays electrode efficiency for added confidence in your measurements. With a 50-set memory and 1000-hour battery life, the pH100A is built for extended use in the field without frequent maintenance or battery changes.

Unlike many competitive probes, the YSI pH100A’s sensors come with waterproof, submersible cables along their entire length, enhancing durability and reliability during sampling. Sensors are available as single-parameter or combination probes for pH or ORP and temperature, allowing you to customise the setup to your specific needs.

The pH100A (grey model) is a direct replacement for the older pH100 (blue model), offering improved performance and user experience. Whether you’re monitoring aquaculture tanks, testing surface water, or managing wastewater systems, the pH100A delivers dependable results with minimal fuss.

Key Features