Moisture analysis in the food industry
The compact 787 KFTitrino combines extremely easy routine operation with flexibility, thus allowing you to adapt the instrument configuration to your special requirements
he compact 787 KFTitrino combines extremely easy routine operation with flexibility, thus allowing you to adapt the instrument configuration to your special requirements. For normal routine water determinations in. * Technical products.
* Non-essential foods.
* Organic solvents.
* Food and beverages.
* Salts and cosmetics.
The ‘Start’ key is all you need, the rest is done automatically.
The strongly recommended 703 Titration Stand stirs the content of the titration vessel; aspirates spent solution and adds solvent, both at the push of a button.
For comprehensive documentation of your analysis and for result reports, a printer can be connected; a balance makes the error free transfer of sample weights possible.
Metrodata VESUVC 3.0 Light, a PC programme for the acquisition of titration data offering highly useful database functions is included in the delivery package.
Advanced portable hygrometer for power plants
Michell Instruments has produced an advanced, intrinsically safe portable hygrometer, that will set the standard for power generators
Michell Instruments has produced an advanced, intrinsically safe portable hygrometer, that will set the standard for power generators. Cermax IS is a user-friendly hygrometer and is both CENELEC and FM certified for use in gas group IIC. Cermax IS provides three important application solutions for engineers within any power station environment: * Being IS in design, the instrument is ideally suited to measuring the dewpoint of Hydrogen that is commonly used as a cooling gas on generator sets.
* The instrument can also be used to confirm the moisture content of sulphur hexaflouride (SF6) that is used as an arc quenching gas on high voltage switchgear.
* The third, most common use for any portable dewpointmeter is that of checking the quality of dry compressed air, as used throughout the power industry.
Cermax IS provides raw performance, rugged reliability and advanced features for measuring the dew-point of non-flammable and flammable gases within petrochemical and natural gas plant areas.
This means the advanced portable hygrometer can provide the site chemist and operational staff with an effective means to check the moisture concentration at any point in their process.
Cermax IS is easy to use, fully self-contained and no external services are required, meaning that within seconds, the device is ready to display the measured dew point of the sample gas under test.
The advanced user interface allows you to decide whether to make a simple measurement or to perform more complex functions like pressure compensation, range selections, input scaling, data-logging, etc.
The versatility of Cermax IS means that for more demanding process applications a range of ‘bolt-on’ sampling systems are available.
While developing Cermax IS, the engineers at Michell Instruments recognised the users requirements and the importance of a fast speed of response.
The intrinsically safe hygrometer has been developed with this feature in mind.
With an inherently fast cermic moisture sensor and a minimum volume stainless steel sample housing, Cermax IS has a substantial head start on the competition.
The product also has a user selectable field operation mode and this allows even ppm level measurements to made in as little as a few minutes.
The portable dew-point meter prides itself with high accuracy and reliability.
The combination of advanced sensor technology and measurement circuitry give Cermax IS a standard measurement range from -100 to +20C dew point and indication down to -120C and up to +30C dew point.
Cermax IS is the latest addition to the Michell Instruments range of versaltile hygrometers suitable for a variety applications.
Michell Instruments develops and manufactures an extensive range of impedance hygrometers for compressed air, natural gas, petrochemical, and power generation industries.
For more information on Cermax IS, or any products in Michell Instruments impedance range please consult the website.
Stainless tank vent dryers in hostile environments
Brownell has introduced a new range of tank vent dryers in high stainless steel to compliment their existing and aluminium versions, for use in hostile environments
Brownell has introduced a new range of tank vent dryers in high stainless steel to compliment their existing and aluminium versions. The dryers and adsorbents prevent valuable fluid materials form being contaminated by harmful moisture condensation. Installation of the units is quick and simple with a direct connection being made to an existing breather or vent pipe.
The Brownell Mark 6 tank vent dryers are suitable for use in aggressive and hostile environments such as the North Sea, and are designed for use with storage tanks containing corrosive fluids such as acid and alkalis.
Typical locations would include chemical sites, plant works and processing installations.
The dryers are offered in five different sizes.
Optional electronic detectors enable users to constantly monitor the efficiency and capacity of the dryer.
Saturated adsorbents can be identified by an alarm, taking away the need for routine manual monitoring.
All products are manufactured to the Brownell BS5750 approval.
Simple and affordable dew point measurement
Michell Instruments have developed a low cost, rugged dew-point transmitter for continuous measurement of compressed air or process gases
Michell Instruments have developed a low cost, rugged dew-point transmitter for continuous measurement of compressed air or process gas. The Easidew Transmitter has been developed as a result of market demand for simple and affordable dew point measurement. The transmitter is designed for ease of use, incorporating all the features you want, to make installation and operation as simple as possible.
For the first time, dew point measurement is made as accessible as temperature and pressure with this fully configured, calibrated transmitter that can be instantly incorporated into your air or gas management and control system.
The Easidew Transmitter is not only economical to buy, but also economical to install and operate.
The simplicity and ruggedness of its design keep installation costs minimal, while on-going operational costs are low because of the transmitter reliabilty and stability.
Michell even offer an exchange programme so that your process is never out of operation.
The key to the Easidew Transmitter performance is its sensor technology.
The Michell Advanced Ceramic Moisture Sensor is coupled with advanced microprocessor based measurement circuitry to produce a fully calibrated and interchangeable sensor transmitter.
All calibration data is stored within the transmitter flash memory and so calibration exchange or service can be effected in seconds.
The Easidew Transmitter is calibrated traceable to International Standards in the Michell UKAS accredited laboratory.
The inherent stability of its advanced Ceramic Moisture Sensor means that the Easidew Transmitter will give years of reliable operation.
The transmitter is also fast to respond, ensuring that your process is always monitored in real time.
The impedance dew-point transmitter requires a simple operation and is easy to install.
Powered by any dc source from 12 to 28 volts, it provides the user with a linear 4-20 mA signal calibrated from -100 to +20C dew point.
Once the input and output connection is made, the transmitter only needs a sample of air or process gas and measurements can be taken.
As the Easidew Transmitter measures the water vapour pressure in the gas sample, it will give the user an accurate determination of the actual dew point conditions presented to it.
The Easidew Transmitter is part of a family of low cost hygrometers based on advanced ceramic technology and providing on-line and portable dew point measurement in the compressed air, and process gas industries.
For more information on the Easidew Transmitter, or any of our hygrometers in the Easidew range, please contact us via the website.
Water contamination monitors in oil systems
The EASZ-1 Moisture Sensor provides a compact, real-time solution to continuous water contamination condition monitoring in hydraulic and lubricating systems used throughout manufacturing industry
The EASZ-1 Moisture Sensor provides a compact, real-time solution to continuous water contamination condition monitoring in hydraulic and lubricating systems used throughout manufacturing industry. Apart from measuring water contamination in dehydrators, compressor oil lines and engines, the sensor is also being used to measure moisture in vegetable oils, light and heavy fuels and hydrocarbons. It operates with any type of oil regardless of density and can be zero calibrated to a particular oil for low moisture content as well as higher content up to 25%.
Custom curves can be plotted for unknown oils at varying temperatures.
The sensor has a built in temperature sensor so that dependencies on temp, dielectric and water content for example can be internally graphed.
The sensor reads values in steps of 100ppm, starting from 100ppm, and is loop powered.
On-line oil monitoring requires fast response.
Frequently water contamination in oil can go unnoticed.
The response time of the EASZ-1 is 1 second, as opposed to the previously available 15 to 30 minutes, which enables the user to detect free water or moisture build up in the oil circulating system immediately, before serious contamination has occured.
The EASZ-1 comes with a standard analogue output or an RS-485 module and is normally fabricated to fit into 1 inch NPT pipes.
A 2 inch explosionproof version is available with CSA or ATEX certification.
Moisture measurement in oil
Moisture measurement in lubricating and insulation oils makes an important contribution to long-term maintenance functionality of plant and equipment
Moisture Measurement In Oil With the Lufft A1-SDI Indicator and Moisture Sensor. Moisture measurement in lubricating and insulation oils makes an important contribution to long-term maintenance functionality of plant and equipment and the water content of transformer oil has significant influence on its insulation properties. Moisture monitoring is therefore of essential importance to daily operations.
In the same way as gas moisture, the moisture content of oil can be stated absolutely in ppm or relatively as the water content aw:while ppm is the water quantity/oil quantity, aw is the actual water content in relation to the water content of a saturated probe.
Oil that is completely free of water has an aw value of 0; completely saturated oil has an aw value of 1.
The new Lufft moisture sensor is based on a long-term stable, chemically resistant, capacitive sensor.
The measurement values that can be selected are water activity (aw), temperature (T) and the calculated water content in ppm for mineral transformer oil.
For non-mineral transformer oils, the device can be adapted by inputting the oil specific parameters of the specific oil into the SDI (Serial Digital Interface) Indicator.
Making sense of Relative Humidity
Monitoring relative humidity is vital in maintaining efficient control of an HVAC system: Dave Quelch of Able Instruments discusses some criteria for selecting RH sensors
Monitoring relative humidity is vital in maintaining efficient control of an HVAC system. Dave Quelch of Able Instruments discusses some criteria for selecting RH sensors. Maintaining optimum environmental conditions, such as humidity and temperature, is essential for any workspace, but particularly so for a clean room environment.
Of these parameters, relative humidity (RH) is one of the most challenging to measure because it is a truly analytical measurement where the sensor must make direct contact with the environment.
RH is also one of the most critical to measure as it has a direct influence on the perception of comfort by staff in the area and can affect the performance of equipment; so it’s important to feed the right information into the control system, so it can make the right decisions.
This necessitates choosing the right type and quality of sensor - and ensuring they are properly calibrated.
For HVAC applications these include psychrometry, displacement, resistive, capacitive and liquid sorption sensors.
Psychrometry is a well-established method that has the benefit of being simple and inexpensive, although it does have intensive maintenance requirements.
Psychrometers are very accurate at near-saturation (100%) conditions, but at lower RH the accuracy is poor and they cannot be used at temperatures below 0C.
Perhaps the oldest type of RH sensor still in common use is the displacement sensor, which is inexpensive to manufacture and highly resistant to contamination.
Unfortunately, this type of sensor has a tendency to drift over time and there is a significant lag between the change occurring and it being registered by the sensor (hysteresis).
A particularly popular choice for HVAC applications is the bulk polymer resistive sensor, which provides a direct, secondary measurement of RH.
These use a humidity-sensitive salt embedded in a protective coating that is permeable to water vapour, providing protection against contaminants in the air while ensuring an accurate measurement.
What makes these types of sensors popular for HVAC applications is their relative immunity to surface contamination.
However, it is important to bear in mind that while a surface build up will not have an adverse effect on accuracy, it will delay the response time, so surfaces will need to be cleaned as part of a general maintenance regime.
In addition, these sensors are better suited for use in RH ranges above 20% because of the extremely high resistance at RH values below this figure.
Where a high degree of sensitivity is required at low RH, the capacitive sensor is frequently chosen.
These are usually designed with parallel plates with porous electrodes, or with interdigitated fingers on a substrate.
The sensor material is very thin to achieve a large signal change with humidity.
It also permits water to enter and leave easily and allows for fast drying and easy calibration.
Capacitive sensors are ideal for high temperature environments because the temperature coefficient is low and the polymer dielectric can withstand high temperature.
At low humidity levels these sensors are very sensitive and provide a relatively fast response; but at higher RH values they have a tendency to saturate and become non-linear.
Whatever type of sensor is specified, it is important to ensure correct calibration before delivery - ideally individually rather than batch tested.
The manufacturer should also be able to provide an audit trail for calibration, using methods approved by the National Physical Laboratory.
To that end, chilled mirror (optical condensation) hygrometers are widely accepted as the most precise method for calibrating the sensors used in day-to-day HVAC applications.
These use the actual condensation point of the ambient gas and can easily be made traceable to international calibration standards such as UKAS and NIST.
Alternative methods for calibrating RH sensors include salt baths, but these require a long equilibrium time to achieve accurate results and, with commercial pressures in play, it is all too easy to rush the calibration at the expense of accuracy.
Salt baths are also very prone to cross-contamination.
In an environment where accurate measurements are critical to effective environmental control, the accuracy of the information from sensors is vital.
In choosing the most appropriate sensor for the particular space, HVAC designers can ensure the system response is based on meaningful information.
Making dew point measurement simple with Easidew
The Easidew On-line hygrometer offers affordable dew-point measurement, it is designed to make continuous measurement of the dew point in compressed air and industrial gases reliable and accurate
Michell Instruments is proud to annouce the launch of its new on-line hygrometer. The Easidew On-line offers affordable and simple dew-point measurement and is designed to make continuous measurement of the dew point in compressed air and industrial gases reliable and accurate. The latest generation of the Easidew On-line offers many new features, including an enhanced digital display, analogue and digital outputs and dual alarm feature.
Easidew also offers measurement in C and F displayed on a large red LED monitor and operates with a universal power supply.
The Easidew On-line offers unbeatable, intelligent and interchangeable sensor technology.
The Michell Advanced Cermic Moisture Sensor is coupled with the the latest microprocessor based measurement circuitry to produce a fully calibrated sensor transmitter module.
All calibration data is stored within the memory and so sensor exchange for calibration or service can be effected in seconds.
The Easidew On-line is designed to provide you with continuous and reliable measurement of your air or gas system.
The Easidew puts intelligent dew-point control right at the measurement point, transmitting calibrated data back to the monitor unit, which can be located up to 800m away.
This means you can feel confident that the Easidew On-line will always provide you with vital, real-time information on the quality of air from your dryer system, or the gas in your process line.
The large red LED display means that you can easily determine the dew point of your process even in the most dimly lit plant.
The Easidew On-line also provides a 4-20mA analogue and RS232 digital output for connection to a chart recorder, data-logger or computer system, so you can analyse trends in dew point over time.
The dual alarms can easily be configured by the user from the instrument IP65 front panel: this makes the Easidew On-line ideal for the monitoring of desiccant dryers, or other critical applications.
As with all Michell products, the Easidew On-line is designed to the highest standards to ensure that dew-point measurements are accurate and reliable.
Michell Instruments has thirty years of experience in developing and refining sensor technology to ensure that every sensor performs to its optimum capabilties.
In order for this to be achieved each Ceramic Moisture Sensor goes through a multi-mode test and inspection process to verify its reliability and capability.
Only when the sensor has passed a variety of rigorous tests is it ready to be applied to your process control application.
Each Easidew On-line is supplied with a calibration certificate traceable to a national standards from the Michell Instruments UKAS accredited laboratory.
New intelligence for measuring moisture in oil
Vaisala introduces the new Vaisala Humicap moisture and temperature transmitter series for oil, the Humicap MMT330
Vaisala introduces the new Vaisala Humicap moisture and temperature transmitter series for oil, the MMT330. The series facilitates fast, reliable, and accurate on-line measurement of moisture and temperature in oil. Moisture measurement for oil can considerably decrease maintenance costs and prolong the service lifetime of machines.
The main applications for the MMT330 are the moisture measurement of lubrication, hydraulic fluid and transformer oils.
The MMT330 measures water activity and temperature in oil.
The water activity measurement in oil offers several advantages compared to the traditional ppm-measurement.
The MMT330 provides reliable information on how close the oil is to its saturation point, ie the formation of free water.
Oil-specific calibration is not necessary, as water activity is not affected by the type or age of the oil.
Moreover, the transmitter can be ordered with a ball valve set, allowing installation and removal of the probe for calibration without draining the oil system.
The MMT330 can be ordered with a large numerical and graphical display with a multilingual menu.
With the new probe options the operating pressure range has been expanded to 250 bars.
Data logging capability and the ability to download to a PC allow the user to monitor measurement trends and up to one year of historical data.
Due to full compatibility with the Vaisala Humicap hand-held moisture in oil meter MM70, field-checking, maintaining, and calibrating the MMT330 is easy.
The Vaisala Group is a successful international technology company that develops and manufactures electronic measurement systems and equipment for meteorology, environmental sciences, traffic safety and industry.
Portable hygrometers supplied to Chernobyl
Dewpoint instruments manufactured by Michell Instruments have been supplied to engineers working at the Chernobyl nuclear plant in the Ukraine, formerly part of the Soviet Union
Dewpoint instruments manufactured by Michell Instruments have been supplied to engineers working at the Chernobyl nuclear plant in the Ukraine, formerly part of the Soviet Union. Two Cermax portable dewpointmeters have been supplied via the Michell Instruments Russian distributors ‘Regular Co’. One of the Cermax instruments will be used to monitor and log the dewpoint (moisture content) of instrument air, with a dewpoint of -60C.
The other instrument is to be used to monitor argon with a dewpoint of -80C.
The argon is to be used for welding and the moisture content is critical to achieve the extremely high standard of welding required in the reconstruction of a nuclear power station.
After the explosion of one of the nuclear reactors in April 1986, the policy of the authorities was to source all equipment from local (Ukrainian or Russian) equipment.
However the required specification and quality of the Cermax cannot be matched by local equipment so special dispensation was given to Regular Co, which allowed them to quote Cermax as part of the tender process, in which they were eventually successful.
The Cermax utilises the Michell Instruments Ceramic Sensor to provide accurate and stable measurement of moisture of most commonly used gases.
Features include data logging, pressure compensation and fast response.
For hazardous areas and explosive gases the Cermax IS is available, which is ATEX, FM and CSA certified.