
pH sensors are essential for accurately measuring solutions’ acidity or alkalinity across various applications, including water quality monitoring, industrial processes, and environmental assessments. They provide real-time data critical for maintaining safety, compliance, and operational efficiency.


Precise pH and conductivity sensor measurements for drinking water. This pH sensor is fantastic in its modular design and seamless integration make it essential for accurate water quality monitoring.
The TW pH/EC analyser from TriOS’s innovative TW Master Series is specifically designed to provide precise pH values and electrical conductivity measurements, ensuring compliance with the highest water quality standards. Its cutting-edge features and modular design make it an indispensable tool for water quality professionals.
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Find out more about the TW Turb sensor by downloading our comprehensive datasheet. This detailed document provides in-depth information on specifications, features, and applications, empowering you to make informed decisions for your water quality monitoring needs.
This pH and Conductivity sensor is a high-precision instrument that accurately measures pH levels and electrical conductivity in drinking water applications. It features a broad pH measurement range from 0.0 to 14.0 pH with a resolution of 0.1 pH and an accuracy of ±0.1 pH. For electrical conductivity, it offers a range of 0 to 1990 µS/cm, a resolution of 10 µS/cm, and an accuracy of ±2% full scale. These specifications ensure reliable monitoring of water quality parameters, which is essential for maintaining safety and compliance in water treatment processes.


High-Precision Measurement: Specifically developed for accurate analysis of pH values and electrical conductivity in drinking water, ensuring reliable data for quality assurance.
Modular Design: As part of the TW Master Series, it allows for customised combinations with other modules to meet specific application requirements, providing flexibility in monitoring various parameters.
Compact and Robust Construction: At just 160 mm x 280 mm x 108 mm, the TW pH/EC is designed for easy integration into almost any installation without compromising on durability.
Seamless System Integration: When combined with the TW PS300 supply and communication module, measurement data can be effortlessly transferred to existing systems, facilitating real-time monitoring and analysis.
Flexible Optical Path Lengths: This product offers adaptable optical path lengths through various lens sockets, allowing customization to specific application needs.
User-Friendly Interface: It is designed for simple assembly and configuration, allowing for quick setup and operation, which is essential for efficient water quality management.
Efficient Maintenance: Its design facilitates fast cleaning, reducing downtime and ensuring continuous operation, which is crucial for maintaining consistent water quality monitoring.
Drinking Water Monitoring: This service ensures the safety and quality of potable water by providing accurate pH and conductivity measurements, which are critical parameters in water quality assessment.
Wastewater Treatment Plants: This position assists in quality control processes by monitoring pH and conductivity levels, ensuring compliance with discharge regulations and optimal treatment performance.
Environmental Research: Supports water quality studies by providing reliable pH and conductivity data in various water bodies, aiding in environmental monitoring and research initiatives.
Measurement Parameters: pH value, electrical conductivity, temperature
Dimensions: 160 mm (W) x 280 mm (H) x 108 mm (D)
Integration: Compatible with the TW PS300 supply and communication module for seamless data transfer
Construction Materials: Durable materials ensuring longevity and reliability in various operational environments
We have prepared detailed responses to complex inquiries about the TW pH/EC sensor. Gain insights into its advanced features, integration capabilities, and maintenance protocols, ensuring optimal performance in precise pH and conductivity measurements for drinking water applications.
The TW pH/EC sensor employs advanced temperature compensation algorithms to maintain measurement accuracy across various environmental conditions. By integrating automatic temperature compensation (ATC), the sensor adjusts readings to account for temperature variations, ensuring precise pH and conductivity measurements essential for critical water quality assessments.
The sensor utilises a pre-amplified pH electrode, which enhances signal stability and reduces susceptibility to electrical noise, ensuring reliable data transmission even in electrically noisy environments.
The TW pH/EC sensor is designed for seamless integration with Supervisory Control and Data Acquisition (SCADA) systems. It features digital communication protocols, such as RS485 with Modbus RTU, facilitating real-time data transmission and control within industrial automation frameworks.
The TW pH/EC sensor is equipped with advanced compensation features that account for ionic strength variations, ensuring accurate pH measurements even in samples with fluctuating conductivity levels. This capability is crucial for measuring precision in diverse water quality monitoring scenarios.
The TW pH/EC sensor is engineered for low maintenance, incorporating features like durable electrode materials and a design that minimizes fouling. Regular maintenance protocols include periodic calibration and cleaning, which are streamlined by the sensor’s user-friendly design, ensuring sustained accuracy and longevity in extended deployments.
The TW pH/EC sensor supports multi-point calibration for pH and conductivity measurements, allowing for precise calibration across the sensor’s entire measurement range. This multi-point calibration ensures long-term measurement stability and accuracy, which is critical for reliable water quality monitoring.
Our team of dedicated field support group technicians are vastly experienced in applications and installations. We therefore appreciate and understand how analysers work, why they were installed and what data they typically ought to produce.
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Established in 1971 PMA is a well-recognised and award winning provider of online instrumentation for process control and compliance monitoring. With expertise in analytical techniques such as Photometry, Colorimetry, Ion-selective electrodes (ISEs), Titration, Fluorescence, Ultrasonics and more.



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