Advanced pH sensor technology from Foxboro
June 2018
Sensors & Transducers
Foxboro has been manufacturing pH probes and transmitters for over seventy years. Using this field-proven experience, the company has now developed the Dolphin series of pH sensors.
Due to the advances in manufacturing techniques and the discovery of new materials, today’s pH sensor technology looks and operates differently. In pH probes of the past, the reference junction had to be kept wet at all times. In the latest Foxboro pH sensor technology incorporated in the Dolphin series, the entirely solid-state reference junction is manufactured from Nafion and Ceramic, which eliminates the need for wetted parts.
1. Double junction reference tube using a Nafion Barrier. 2. High temperature gel. 3. RTD and solution assembly. 4. Ceramic reference junction. 5. Unique spherical or flat glass pH electrodes.
The probes body is manufactured from PVDF (polyvinylidene fluoride, commercially known as Kynar), which incorporates the microprocessor-based smart electronics where all the sensor data and calibration curves are recorded and stored. The probe also has features built-in, temperature compensation and the digital signals from sensor to transmitter are less prone to RFI/EMI interference than conventional analog signals.
An added benefit of the Dolphin series is that users can connect the probes directly to a PC or laptop for ease of use. Via FDT and DTM certified software, the probes can be calibrated in the workshop prior to installation. In addition, information can also be extracted from the probe for maintenance and diagnostic purposes.
In summary, the advantages of the Dolphin series pH probes include:
• Unique Nafion ion barrier prevents reference junction fouling and reduces the need for cleaning.
• Rugged PVDF sensor body is chemical and abrasion resistant, resulting in longer service life.
• No metallic wetted parts, results in corrosion resistance and longer life in strong chemical solutions.
• Unique pH electrode formulations, both flat glass for abrasion resistance and domed glass for high-temperature service.
• Enhanced diagnostics reduce the amount of time required to assess sensor health.
• Unique sensor mounting design provides faster insertion and removal from the process.
• Kyner sensor body and a rugged electrode result in reduced breakage during handling.
For more information contact Johan van Jaarsveldt, EOH, +27 (0)87 803 9783, [email protected], www.eoh-pas.co.za
Further reading:
Next-generation condition monitoring
Sensors & Transducers
The next generation Sitrans MS200 multisensor from Siemens is setting new standards in condition monitoring.
Read more...
Telco sensors for blocked/empty chute detection
Sensors & Transducers
Telco sensors overcome the problems of contaminated environments through powerful high-performance infrared sensors that ensure penetration of harsh pollution and guarantee reliable detectio
Read more...
Cleaning solutions for optical sensors
Endress+Hauser South Africa
Sensors & Transducers
Achieving accurate and continuous process visibility requires reliable sensor performance, even in challenging media. Endress+Hauser’s CYR51 mechanical cleaning unit addresses these challenges by providing stable, automated cleaning of turbidity and UV-Vis absorption sensors.
Read more...
Next-generation gas meter module
Sensors & Transducers
Sensirion has launched its new gas meter module combining a low-power consumption mode, future-ready compatibility and seamless integration, all within the same compact form factor.
Read more...
Adjustable proximity sensor with five metre range
Gail Norton Instrumentation
Sensors & Transducers
The Telco line of photo-electric eyes have the accuracy and reliability you need.
Read more...
Food safety – a matter of weight
Sensors & Transducers
Weighing systems play a key role in ensuring product quality in food production, complying with legal requirements and avoiding product recalls. The Minebea Intec MiNexx portfolio has been specially developed to meet these requirements.
Read more...
Telco sensors in the paper and pulp industry
Gail Norton Instrumentation
Sensors & Transducers
The paper and pulp industry poses a major problem for most photoelectric sensors. Telco Sensors has overcome this with its powerful and high-performance photoelectric sensors, ensuring penetration of thick and harsh pollution while guaranteeing reliable detection.
Read more...
Leaders in sensor technology
Gail Norton Instrumentation
Sensors & Transducers
A new addition to the Telco Sensors range is the adjustable Proximity sensor, with a range up to 5 metres.
Read more...
Cutting-edge sensor technology
Endress+Hauser South Africa
Sensors & Transducers
The advantage of Endress+Hauser’s Memosens technology is that digitised measured values and sensor information are transmitted via a non-contact connection from the sensor to the cable, and as a digital signal to the transmitter.
Read more...
Miniature inductive sensors
ifm - South Africa
Sensors & Transducers
The inductive IY/IZ type sensors from ifm are used in various industrial areas where space is limited.
Read more...
printer friendly version