The Apera Instruments 201T-S is a 3-in-1 pH electrode that combines pH measurement, temperature sensing, and automatic temperature compensation (ATC) into a single probe. Designed for precise pH measurements in laboratories, environmental monitoring, and quality control, it delivers stable, reliable readings in general aqueous solutions.

With a gel-filled KCl electrolyte and shock-resistant polycarbonate housing, this electrode requires no maintenance and withstands demanding lab conditions. It is not recommended for very low ion, highly basic, corrosive, or high-temperature continuous-use environments.

Key Features:

✔ 3-in-1 Functionality – pH, temperature, and ATC in one probe
✔ No Maintenance Needed – Non-refillable KCl gel electrolyte
✔ Rugged Design – Shockproof, corrosion-resistant polycarbonate body
✔ Easy Cleaning – Removable electrode cap
✔ High Compatibility – Works with multiple Apera instruments
✔ 6-Month Manufacturer’s Warranty

Compatible Apera Instruments:

• PH400, PC400

• PH400S, PC400S

• SX711, SX723, SX736

• WS100, WS200

Limitations:

???? Not suitable for:

• Low-ion solutions (e.g. distilled/deionized water)

• Highly alkaline solutions (pH > 12)

• Corrosive liquids

• Continuous use in temperatures > 60 °C