Jumo monitors ammonia leakage
April 2007
Analytical Instrumentation & Environmental Monitoring
Due to its good thermodynamic properties, ammonia is often used as a coolant in small refrigeration systems and in large industrial plants. However, ammonia is a corrosive and poisonous chemical that can be a potential hazard and which requires continuous monitoring. Careful monitoring is even more important if the plant concerned is being supplied with water from rivers or open waters.
Most refrigeration systems consist of a primary circuit (with ammonia) and a secondary circuit. The secondary circuit usually contains a mixture of water and glycol. There is a potential risk of leakage at the interface between the primary and secondary circuits; for instance the refrigeration piping can corrode. If this piping is made from copper, the wall thickness of the pipe may become so thinned by the chemical reaction of the copper with the ammonia that a hole occurs.
To monitor this, Jumo has developed the new Aquis 500 series as an economical system to detect ammonia. The ion-sensitive sensor operates over a range from 0,01 mg/l to 20 g/l and consists of a pH glass electrode and a reference electrode. Both electrodes are immersed in a special electrolyte. An ammonia-permeable membrane separates the pH and reference electrodes from the medium being measured.
To achieve optimum detection of the ammonia, Jumo has a special flow-through fitting for the ammonia sensor. This facilitates connection of the sensor to process piping.
The associated transmitter or controller is easy to configure via a simple menu-driven interface. In the normal display setting, the Aquis 500 shows the principal measurement and the temperature, either as a numerical display or as a bar graph. A trend indicator can also be activated.
The IP67 enclosure protection allows the instrument to be used either as a panel-mounted instrument or as an on-site measuring device. Condensation in the electronics is prevented by a diffusion-open membrane.
Up to two electrically isolated analog outputs (0/4-20 mA or 0/2-10 V) can be configured as process value or control outputs. The type of output and scaling are user-programmable.
Another two outputs can be fitted with changeover relays. These relays enable limit monitoring. Three power supply options are available: 12 V d.c., 20-53 V a.c./d.c. and 110-240 V a.c.
For more information contact Anastas Schnippenkotter, ASSTech Process Electronics & Instrumentation, +27(0)11 708 9200, info@asstech.co.za
Further reading:
Why measurement matters in smelting
Endress+Hauser South Africa
Analytical Instrumentation & Environmental Monitoring
South African smelters returning to operation after energy constraints face new demands for tighter control, better visibility and environmental compliance. Endress+Hauser explains how modern measurement technology supports safer, more efficient furnace operation and local beneficiation.
Read more...
Sun tracking with pinpoint precision
Senseca
Analytical Instrumentation & Environmental Monitoring
Senseca has introduced the SEMS-2000 solar energy measurement system, a 2-axis solar tracker with pinpoint sun-pointing accuracy that automatically monitors direct, global and diffuse irradiance for unattended outdoor solar installations.
Read more...
AMETEK expands 993X gas analyser series with explosion-proof enclosures
Analytical Instrumentation & Environmental Monitoring
AMETEK Process Instruments has added ATEX and IECEx Zone 1-certified explosion-proof enclosures to its 993X series of gas analysers, enabling reliable installation in Zone 1 hazardous locations where purge gas is unavailable.
Read more...
Why medical device leak testing matters for South Africa's MedTech future
ATEQ South Africa
Analytical Instrumentation & Environmental Monitoring
As South Africa works to grow local medical technology manufacturing, non-destructive leak and flow testing is becoming a strategic quality assurance tool, helping manufacturers verify device integrity, meet regulatory requirements and improve production efficiency.
Read more...
Moving forward with reverse osmosis
Analytical Instrumentation & Environmental Monitoring
Rising water costs and pressure on infrastructure are changing the way industries view reverse osmosis. G-Chem Aquacare is developing tailored, containerised solutions that make the technology more accessible for South African industry.
Read more...
Meteorological data logger with up to 32 analogue sensors
Senseca
Analytical Instrumentation & Environmental Monitoring
Senseca has introduced its advanced data acquisition system for environmental monitoring, which has a universal data logger for up to 32 analogue, pulse and smart digital sensors.
Read more...
Importance of gas analysis in the petrochemical industry
Elemental Analytics
Analytical Instrumentation & Environmental Monitoring
Gas analysis plays a critical role in petrochemical operations, supporting process optimisation, product quality and plant safety. As an experienced and expert gas analysis supplier, Elemental Analytics can provide the correct analyser and sample system package to meet individual plant requirements.
Read more...
Fully integrated standalone thunderstorm warning system
Senseca
Sensors & Transducers Analytical Instrumentation & Environmental Monitoring
Senseca South Africa has introduced its BTD-1 fully integrated, standalone thunderstorm warning system, which detects lightning by monitoring the background quasi-electrostatic field. The system can generate alerts before the first lightning strike, with a detection raterange of up to 83 km.
Read more...
Environmental monitoring with testo Saveris 1
Analytical Instrumentation & Environmental Monitoring
The testo Saveris 1 environmental monitoring system has been in continuous use since 2010 at Jungbunzlauer, a biotechnology company in Germany, providing seamless temperature and humidity data for audit-ready, GxP-compliant processes across laboratories, warehouses and production areas.
Read more...
Reliability restored through systemic vibration analysis
Wearcheck
Analytical Instrumentation & Environmental Monitoring
Condition monitoring specialist, WearCheck uses a variety of testing techniques to enhance reliability in machinery components and prevent failures.
Read more...
printer friendly version