November 2000Analytical Instrumentation & Environmental Monitoring
One of the main causes of atmospheric pollution is uncontrolled emission of dust. Classified industries are required to fit an approved dust emission measurement system such as that offered by Oldham.
The Oldham Observer EP 1000 is based on the principle of laser beam retrodiffusion by dust particles. Pointed towards the dust-bearing atmosphere, the laser beam is reflected by the suspended particles back towards the source, providing an indication of dust concentration. The amount of reflected light is used to determine dust concentration in the atmosphere. Measurement is instantaneous and permanently recorded.
Figure 1. The Oldham Observer EP 1000 dust monitor
The EP 1000 uses light reflection (instead of absorption as in other equipment) and has the ability to measure very low concentrations with no zero drift. It is relatively insensitive to water droplets, flowrate and particle temperature. The unit features excellent signal linearity, especially at very low concentrations.
The laser transmitter is modulated, only the portion of the detected light that exhibits modulation identical to transmitting laser's modulation is measured as reflected light. This makes the dust monitor essentially immune to interference from any spurious light sources. The detector is relatively insensitive to water droplets and it has a built-in protection from dust penetration. This is implemented by means of a positive air pressure (from an air blower) and an optional shutter. These features, together with its insensitivity to temperature variations make it a reliable instrument.
The detector is housed in an easy to install polyurethane box, only one side of which has to be mounted into the stack. The unreflected portion of the transmitted laser beam enters a light trap, which is mounted on the stack, opposing the sensor/transmitter installation. The sensor requires no special alignment.
Figure 2. Accessories: air blower, chart recorder, remote keyboard and light traps
Several selectable ranges of operation are available, the device, which has a linear response characteristic, may be run continuously or be used for instantaneous measurements. Outputs available are 2 to 20 mA, RS485, RS422 and Modbus. The Oldham Observer EP1000 has a setpoint overshoot alarm and is specified to operate between -25 and +55°C.
Getting the chemistry right
Analytical Instrumentation & Environmental Monitoring
Grace’s European production site has relied on analogue compression load cells from Minebea Intec for decades, with the long-proven measurement concept now serving as the reference for new silo projects as the company expands its capacity.
Read more...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.
While every effort has been made to ensure the accuracy of the information contained herein, the publisher and its agents cannot be held responsible for any errors contained, or any loss incurred as a result. Articles published do not necessarily reflect the views of the publishers. The editor reserves the right to alter or cut copy. Articles submitted are deemed to have been cleared for publication. Advertisements and company contact details are published as provided by the advertiser. Technews Publishing (Pty) Ltd cannot be held responsible for the accuracy or veracity of supplied material.
printer friendly version