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, [email protected]
Further reading:
Analysers for use in high ambient temperature environments
Analytical Instrumentation & Environmental Monitoring
The 993X series of analysers from Ametek Process Industries are now IECEx Zone 2 certified for use in locations with up to 60°C ambient temperature. Built with IP66-rated enclosures and using an integrated cooling system, they can be installed outdoors or in minimally temperature-controlled enclosures, reducing complexity while lowering capital and operating costs.
Read more...
The art of precision measurement
Analytical Instrumentation & Environmental Monitoring
To achieve precise, reliable measurement results when scanning component parts, use is frequently made of reference points. In optical measuring processes, these permit the referencing of three-dimensional objects during the digitisation.
Read more...
Vibration test system supports international space industry
TANDM Technologies
Analytical Instrumentation & Environmental Monitoring
Dragonfly Aerospace has launched EOS SAT-1, one of seven satellites in the world’s first agricultural-focused constellation. With optimisation of resources being a key component for Dragonfly, it called on TANDM to assist in creating and heavily expanding its environmental testing capabilities by providing a vibration test system that allowed it to perform in-house vibration and shock testing.
Read more...
Sensor technology for brewing
Endress+Hauser South Africa
Analytical Instrumentation & Environmental Monitoring
Brewing is a delicate balance, blending tradition with innovation. Now, modern sensor technology is stepping in to perfect the art of fermentation.
Read more...
Loesche gets dirty
Loesche South Africa
Analytical Instrumentation & Environmental Monitoring
The world’s attention is on environmental sustainability, and the pressure on countries and companies to demonstrate their commitment to preserving the environment and preventing climate change is at an all-time high. As we confront a multitude of environmental and social challenges, managing waste and maximising landfill diversion can play a key role.
Read more...
Water systems with energy savings and sustainability
Labotec
Analytical Instrumentation & Environmental Monitoring
ELGA Veolia has relaunched its award-winning PURELAB flex range, with features to reduce the system’s environmental footprint and incorporate some of the latest innovations in water purification technologies. The ecological improvements integrated into the flex range have been made to reduce water and power consumption.
Read more...
Keeping an eye on invisible radiation
Omniflex Remote Monitoring Specialists
Analytical Instrumentation & Environmental Monitoring
At its peak in 1994, the energy generation capacity of the UK’s nuclear power stations was 12,7 GW across 16 plants. In 2024, the capacity has fallen to around 5 GW, and the number of stations is down to nine. However, this is far from the end of the story as spent nuclear fuel remains radioactive for centuries, and requires rigorous safety processes to safeguard against leaks.
Read more...
Technology for water sustainability
Endress+Hauser South Africa
Analytical Instrumentation & Environmental Monitoring
The sustainability of surface water is critical for South Africa’s economic development, social well-being and environmental health. Endress+Hauser has a full range of liquid analysis sensors and transmitters to measure important parameters and has an excellent global track record in water and wastewater process plants and various surface and industrial water monitoring sites.
Read more...
Reducing water consumption in the cement industry
Loesche South Africa
Analytical Instrumentation & Environmental Monitoring
Water is a finite and irreplaceable resource, fundamental to life on earth. LOESCHE’s vision is to enable its customers to produce high-quality cement, without any water consumption.
Read more...
Ensuring occupational health and safety in mining
Analytical Instrumentation & Environmental Monitoring
Probe Integrated Mining Technologies (Probe IMT) has partnered with M3SH Technology to offer state-of-the-art environmental monitoring solutions that address these dual requirements.
Read more...
printer friendly version