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, johan.vanjaarsveldt@eoh-pas.co.za, www.eoh-pas.co.za
Further reading:
Market opportunity for sensors in humanoid robots
Sensors & Transducers
A new IDTechEx report forecasts the market for sensors in humanoid robots will exceed $6,59 billion by 2037, driven by perception sensors, force/torque sensors, encoders and inertial measurement units across a growing range of commercial robot platforms.
Read more...
The wireless route to safer, more efficient mining operations
Emerson Automation Solutions
Editor's Choice Sensors & Transducers
Modern wireless level measurement technologies are helping mining operations improve process control, increase safety and reduce installation costs. Emerson’s Rosemount 3408 wireless non-contacting radar level transmitter uses 80 GHz frequency-modulated continuous wave radar with HART communication to reach remote assets where cabling is impractical.
Read more...
Telco sensors for harsh environments
Sensors & Transducers
Telco sensors are designed to operate where moisture, particulate contamination and surface fouling would disable conventional sensors, with a range including an adjustable five-metre infrared proximity sensor for harsh industrial environments.
Read more...
The data-driven path to sustainable manufacturing
ifm - South Africa
Editor's Choice Sensors & Transducers
Smart automation is closing the gap between operational efficiency and environmental responsibility, and the data to do it is already inside the plant. With ifm’s sensing and digitalisation technologies, manufacturers can turn machine intelligence into measurable sustainability gains.
Read more...
Expanding visibility in mining operations
Emerson Automation Solutions
Editor's Choice Sensors & Transducers
Advances in wireless communications, condition monitoring and sensing technologies are helping mining operators extend measurement into previously under-monitored areas, improving equipment reliability, process performance and water stewardship.
Read more...
Fiber-optic amplifiers for precise object detection
ifm - South Africa
Sensors & Transducers
The OCF fibre-optic amplifier detects even the smallest or most transparent objects in confined spaces, making proven fibre-optic technology easier and more user-friendly than before.
Read more...
The next era of measurement and instrumentation
Sensors & Transducers
Smart sensors and non-contact radar are reshaping industrial measurement, feeding connected platforms that predict failures before they happen.
Read more...
Distance sensor for confined spaces
ifm - South Africa
Sensors & Transducers
The O6D100 from ifm has been designed as a powerful all-rounder for typical applications in object detection, distance measurement and positioning.
Read more...
Optimise sludge treatment and reduce operational costs
Endress+Hauser South Africa
Sensors & Transducers
Endress+Hauser’s inline measuring devices, the Proline Teqwave MW 300 and the Proline Teqwave MW 500, determine the total solids content of wastewater directly through microwave transmission.
Read more...
Inclination sensors for motion control
ifm - South Africa
Sensors & Transducers Motion Control & Drives
The JBC dynamic inclination sensor from ifm offers accurate angle measurement in the most demanding conditions, filtering out motion disturbances such as vibrations, shocks and vehicle dynamics to deliver reliable inclination values via IO-Link or programmable switch outputs.
Read more...
printer friendly version