PRODUCTS & APPLICATIONS FLOW, LEVEL & CONTROL METERING ADHESIVE
Flowtechnik UK has been approached by a manufacturer of glue and resin dispensing machines to see if it could accurately measure the flow rate of Araldite AW4804 aluminium filled adhesive and HW4804 hardener in a high temperature (210˚C) application. However, with the viscosity of 300,000 to 1,000,000 cps and with a 55% by weight aluminium filler, this is a very difficult media. It was crucial that the ratio of resin to hardener was accurately controlled. To solve the problem, the
company used a large RS Series helical screw flowmeter from VSE in Germany. The helical screw principle allows the resin to move through the flow meter without loss or slippage of flow, while also allowing a high degree of filler without shearing the media. The flow meter is fitted with interpolation electronics which increases the
FLOWMETERS FOR RESEARCH
For over 20 years, Litre Meter has supplied various flowmeters for a number of research applications, as well as undertaking calibration services, for the Centre for Biomolecular Sciences at the University of Nottingham (CBS). In a recent project, Smart-Trak
resolution by up to 128 times, giving a high output frequency, allowing a greater degree of control and faster
response time to changes in flow rate. As a result, Flowtechnik UK claims to be the first
company to accurately meter extremely viscous adhesive with 55% aluminium filler.
Flowtechnik UK
www.ukflowtechnik.com
LEVEL SWITCHES FOR HIGH TEMPERATURES
There are now five LBFS product variants in Baumer’s ClevelLevel series of compact level switches, which are based on frequency sweep technology. The switch now includes a cooling neck for high
temperature applications, a long version for improved level detection in bulk media, and a process connection compliant to US and Far East standards. According to the company, these are capable of enduring
long-term temperatures up to 200°C (variant-specific), a benefit for demanding hygiene applications such as those found in food and beverage as well as in the pharmaceutical and chemical industry. Both the 82mm and 250mm designs can also be used in tanks with thick layers of insulation as well as
in cone-bottom kettles; and can be vertically installed at the inside tank edge for fill level monitoring. When it comes to highly viscous or bulk media, the product variant with adjustable process connection can be optimally placed in the process to prevent faulty switching operations and unwanted downtime for enhanced equipment productivity.
Baumer
www.baumer.com/CleverLevel
high-performance digital mass flow controllers have been supplied to measure the flow of gases used in biomolecular research. The Smart- Trak 100 Series instruments, which are designed to measure flow ranges from 0-10 standard cubic centimetres per minute (sccm) up to 0-500 sccm, were selected. These are highly stable and deliver a measurement accuracy of ±1% full scale. Larger sizes are available to 1,000 slpm. Smart-Trak incorporates Sierra’s
Dial-A-Gas. Its internal microprocessor is pre-programmed with ten gases that are commonly used in biotech, pharmaceutical, analytical and research applications, although others gases can be substituted. Manufactured in 316 stainless steel,
MEASURING FLOW IN MEDICAL APPLICATIONS
For flow measurement in medical applications, Sensirion has expanded its SFM3xxx platform. As a result, there are now five precise and robust instruments in the range. According to the company, the fully calibrated and temperature- compensated sensors accurately measure the flow rates of air and other non-aggressive gases bidirectionally. Already established, the SFM3000 digital mass
flow meter is suitable for high-volume applications; while the SFM3100 is an analogue product that can be easily integrated into existing devices. A temperature sensor in the gas channel of the sensor enables highly precise temperature compensation and eliminates the need for an additional temperature sensor.
20 DEC/JAN 2016 | INSTRUMENTATION
The new mass flow meter – the SFM3200 – offers a broad dynamic measurement range and high precision at low flow rates. The very low pressure drop in the flow body means this is suitable for medical ventilation and other respiratory applications. In addition, with the
SFM3200-AW and SFM3300- AW, two robust autoclavable mass flow meters are
available. The SFM3200-AW offers high performance at low flow rates, while the
SFM3300-AW offers stability in varying inlet conditions. Sensirion is also working on the development of a disposable product. The sensors can be used in a wide range of
medical applications, such as ventilation or anaesthesia, inhalers, drug delivery and metabolic measurements, etc.
Sensirion
www.sensirion.com
the Smart-Trak features a fast- response control valve, primary standard calibration and National Institute of Standards and Technology (NIST) traceability. They also have a pilot module, available mounted to the face of the instrument or hand-held. This enables a range of control functions including gas type, setpoint value and source, engineering units, output signal and valve state. These control functions are also available from a PC via RS-232. Source code for RS-232 communication is provided but it has optional multi- drop RS-485/MODBUS RTU capability using Sierra’s Compod. A Compod, coupled with Sierra’s Smart-Trak mass flowmeters and controllers, simplifies basic flow control installations and permits networking of multiple instruments using open source MODBUS RTU protocol. Two digital outputs and one analogue input can be configured for a wide variety of process controls. Unlike dedicated PLCs, a Compod is a small device that mounts locally to the face of the Smart-Trak MFC.
Litre Meter www.
litremeter.com
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