Analytical

Digital Transmitter for Liquid Analysis

The digital multiparameter transmitter for process monitoring and controlling in any liquid analysis application. The 1, 2, 4, 8-channel transmitter saves you time and money by offering seamless system integration, simple operation and a reduced need for spare part stock. The modular transmitter provides you with all the benefits of a best-in-class transmitter platform from clever simplicity to maximum process safety.

The multiparameter transmitter is suitable for all applications in industries like: Food and Beverage, Power and Energy, Water and Wastewater, Mining and Minerals Processing, Chemicals and Oil and Gas.

Benefits:

• One transmitter for all liquid analysis applications
• Up to eight (8) channels available
• Seamless integration communication standards to suit every DCS
• Integrated web server for access even via smartphone
• Status oriented maintenance and easy sensor verification with Heartbeat technology

For additional information please feel free to contact our team directly.

High quality measurement for all industries.

More than 30% of all quality-relevant measurements in processes are pH measurements. Reliable pH sensors are extremely important for plant optimisation and process safety.

ORP sensors provide trend information on the disinfection ability in drinking water or swimming pools, aeration control in wastewater treatment plants. We offer an extensive portfolio of sensors to suit any application in all industries. Whether for mining flotation or leaching, to food and beverage plants requiring non-glass sensors, contact our team to find out more information.

pH measuring principle:

The pH value is used as a unit of measurement for the acidity or alkalinity of a liquid. The pH sensitive element of glass electrodes is a glass bulb that supplies an electrochemical potential which is dependent upon the pH value of the medium. This potential is generated because small H+ ions penetrate through the outer layer of the membrane while the larger negatively charged ions remain in the solution. Glass pH probes contain an integrated Ag/AgCl reference system that serves as the required reference electrode. The pH value is calculated from the potential difference between the reference system and the measuring system using the Nernst equation. Digital pH sensors achieve an outstanding linear measurement performance over an extremely wide pH range.

ORP measuring principle:

The redox potential is a unit of measurement for the activity of electrons in aqueous medium. A precious metal electrode (Silver, Gold or Platinum) acts as the measuring element where the active electrons attach. The potential measured at this electrode depends on the number of active electrons in the medium. ORP probes contain an integrated silver/silver chloride (Ag/AgCl) reference system that serves as the required reference electrode with a constant potential. The ORP value is calculated from the potential difference between the reference and the measuring system using the Nernst equation. It is indicated in mV.

Benefits:

• Wide range of sensors with dirt-repellent junctions and materials
• Pre-calibrated sensors with plug-and-play memosens technology
• Wide range of installation accessories from flow through, to immersion and retractable
• Precision buffers available to enable accurate calibration standards
• In-situ sensor cleaning accessories available

For additional information please feel free to contact our team directly.

High precision measurement for all industries

In many applications conductivity is crucial for process control, product monitoring, water monitoring or leakage detection. We provide reliable and accurate instruments for all measurement ranges and conditions, such as ultrapure water, CIP cycles, hazardous areas, high temperatures, or hygienic processes. The selection of the right sensor depends on the application and the conductivity range. To measure low conductivities in pure and ultrapure water, conductive type sensors are best. For process medium with high conductivity like milk, beers, acids, brine, phase separation, a 4-electrode with a wide measuring range is suited.

Conductivity with conductive sensors, measuring principle Conductive sensors feature two electrodes that are positioned opposite of each other. An alternating voltage is applied to the electrodes which generates a current in the medium. The intensity of the current depends on the number of the medium’s free anions and cations that move between the two electrodes. The more free anions and cations the liquid contains, the higher the electrical conductivity and the current flow.

Conductivity with 4-electrode sensors, measuring principle A high ion concentration in the medium leads to a mutual repulsion of the ions and thus a reduction of the current – this is the polarisation effect. This can influence the measuring accuracy of the conductive probes. 4-electrode sensors have two electrodes that are currentless and therefore not affected by the polarisation effect. The measured the potential difference in the medium along with current is used to calculate the conductivity value.

Benefits:

• Wide range of sensors for all applications and measuring ranges
• Compact devices (integrated transmitter) perfectly suited to the Food & Beverage industry
• Wide range of installation accessories from flow through, to immersion and retractable
• Factory calibrated cell constants with plug-and-play installation

For additional information please feel free to contact our team directly.

High accuracy measurement for all industries

The measurement of dissolved oxygen is essential for quality assurance and process control in applications such as aeration control and fermentation. With high quality sensors available in a wide range of materials and measurement ranges from oxygen traces to high oxygen concentrations. Suitable for hazardous areas, and hygienic applications and robust enough for mining processing plants, contact us to discuss the available range of dissolved oxygen sensors.

Optical Dissolved Oxygen measuring principle:

Optical oxygen sensors use the fluorescence quenching method and feature an LED, a photodiode and a separating section to the medium that is covered by an oxygen-permeable layer. The layer contains marker molecules that are excited by an orange light and respond with a dark red fluorescence light. Oxygen molecules attached to the marker molecules and attenuate (quench) the fluorescence light. The photodiode then detects the light intensity which reflects the oxygen partial pressure in the medium.

Amperometric Dissolved Oxygen measuring principle:

Amperometric oxygen sensors comprise of a working electrode and a counter electrode. They are surrounded by an electrolytic liquid in a common chamber and a direct voltage is applied to both. Oxygen permeates from the medium into the electrolyte through a membrane and is converted to a current at the working electrode. The counter electrode keeps the system running by means of a chemical equivalence reaction. The resulting current is proportional to the oxygen partial pressure in the medium.

Benefits:

• Wide range of sensors, wetted materials and measuring ranges
• Wide range of installation accessories from flow through, to immersion and retractable
• Oxygen calibration standards for adjustment, calibration and verification of sensors
• In-situ sensor cleaning accessories available

For additional information please feel free to contact our team directly.

Reliable turbidity, total solids and suspended solids measurement in all industries

Turbidity measurement is essential for quality assurance and process control in a wide variety of applications such as drinking water, effluent monitoring and sludge concentration measurement in wastewater treatment plants, monitoring of seawater inlets or production loss detection in dairies. Contact us to see how sensors for total and suspended solids, turbidity sensors can support your application.

Total Solids and Suspended Solids measuring principle:

Total solids or suspended solids sensors use the back scattered light method. They feature an LED lamp and two light detectors positioned in 90 and 135 degree angles. Solid particles in the medium cause the incident light emitted by the lamp to scatter. The turbidity or solids content of the medium is calculated from the amount of the scattered light received by the detectors. A transmitter displays the final total or suspended solids value in the desired unit such as g/l or %TS.

Turbidity measurement with Absorption Sensors measuring principle:

Absorption turbidity sensors measure the light absorbance of particles in a medium. They feature an LED lamp and light detector that is positioned directly opposite the lamp. Between them, particles in the medium attenuate the emitted light, which is converted by the detector first into an electric signal and then into the final turbidity value. Advanced sensors feature a second lamp-detector arrangement using a different path length, thus improving the reliability of the measurement.

Benefits:

• Wide range of sensors, wetted materials and measuring ranges
• Wide range of installation accessories from flow through, to immersion and retractable
• Smart solid state references for adjustment, calibration and verification of sensors
• In-situ sensor cleaning accessories available

For additional information please feel free to contact our team directly.

Reliable measurement of chlorine, total chlorine and chlorine dioxide

Free chlorine, chlorine dioxide or total chlorine are usually measured to monitor and control the disinfection of drinking water, reuse water or pool water. Chlorine sensors are therefore applied in waterworks, cooling towers, bottle cleaning facilities where they ensure a smooth water treatment compliant to legal limits. Contact us to discuss options for your water disinfection requirements.

Chlorine dioxide measuring principle:

Sensors for chlorine dioxide measurement feature a metallic cathode, which is separated from the medium by a thin membrane. Chlorine dioxide coming from the medium diffuses through this membrane and is reduced at the gold cathode. The circuit is completed by means of a silver anode and the electrolyte. The electron reduction at the cathode is proportional to the concentration of chlorine dioxide in the medium. This process works in a wide pH and temperature range.

Free chlorine and total chlorine measuring principle:

Measurement of free available chlorine is somewhat different. Here, the hypochlorous acid diffuses through the membrane and produces a reaction. The presence of hypochlorous acid in the medium depends on the pH value. This dependency is compensated by means of pH measurement in the flow assembly and balancing in the transmitter. For the measurement of total chlorine, hypochlorous acid and additionally chloramines play a role in a complex system of reactions.

Benefits:

• Full sensor range for free chlorine, total chlorine and chlorine dioxide measurement
• Designed for use in channels and basins as well as installation in flow assemblies
• Ready-to-run chlorine disinfection panels available. Plug-and-play design with all accessories

For additional information please feel free to contact our team directly.

Reliable sludge bed level measurement in thickeners, clarifiers and sedimentation tanks

Sludge level sensors help to manage pumping of sludge, not water. The sensors continuously monitor the separation and transition zones of the clarification and settling phases, so that you can operate your process efficiently. Typical installations are thickeners, clarifiers and washers in mining processing plants, primary and secondary clarifiers at water treatment plants to measure the sludge level, bed level and sludge blanket level. Contact us to discuss your application further.

Sludge level with Ultrasonic sensors measuring principle:

Ultrasonic sludge level sensors feature a piezoelectric crystal that is encased in a resistant polymer housing. When the crystal is excited with voltage it generates a sonar signal. In the process, ultrasonic waves are emitted to scan the separation zones. The measured variable is the time the emitted ultrasonic signal needs to reach the solid particles in the separation zone and return to the sensor receiver. The principle is well-proven and ensures a long-time stable sludge level measurement.

Benefits:

• Proven technology for stable and reliable measurement.
• Available with and without automatic sensor wiper for cleaning in process
• Simple commissioning thanks to predefined calculation models
• Complete range of mounting hardware available for any installation

For additional information please feel free to contact our team directly.

Mobile and stationary sampling of water, wastewater, stormwater and surface water

There are many reasons for sampling water or wastewater. Often it is a legal requirement, but is helps also to protect surface water, to monitor wastewater treatment processes or to identify discharges into sewage systems. Automatic water samplers are the smart, reliable and proven way of sampling.

Sampling of water and wastewater with automatic samplers is easy and absolutely reliable. Flexible sampling programs in the sampler allow taking time-controlled composite water samples, flow-controlled sampling, as well as event-triggered samples in the one device. The collected samples are filled into individually assigned sample bottles.

The automatic sampler range is perfect for mobile water sampling, surface water sampling, river sampling, well sampling and sewer system monitoring. It’s built-in batter pack allows stand-alone operation even in remote areas.

Benefits:

Fail-safe cooling system and secure housing for safety of collected samples

Flexible sampling programs readily programmed

Integrated transmitter can also connect pH, conductivity, oxygen and turbidity sensors

For additional information please feel free to contact our team directly.