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28.02.2008 Vouvry (Switzerland): A lot of process control applications need to react to level detection. In order to offer an easy way to trigger a signal as an input for a PLC or even switch power directly once a certain liquid level is reached, Microprecision electronics added a floater actuator to its successful V3 size MP300 switch series.
A floating polypropylene ball of 50 mm diameter is mounted on a stainless steel lever actuator. Designed for a working temperature of 100°C, short term up to 120°C, this solution also shows a good chemical resistance.
The floater activates a MP320 switch wired as a change over or just simply NO or NC. The switch itself is IP67 sealed and has a power rating of 250 VAC / 6A under EN61058, with an operating temperature range which can go up to 200°C. The switch can be equipped with PUR, SI or PVC cable of any length.
Microprecision Electronics SA is a Swiss manufacturer of standard and custom made mechanical switches for industrial applications.
For further information contact: info@microprecision.ch |
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A range from 50 mB to 4 000 B or 5 m water to 250 m water
Our large range of stainless steel pressure sensors is designed to measure fluid pressure. These sensors can be used to measure liquid levels for applications such as:
- filling tanks
- check of water table levels
Our sensors can be equipped with configurable recording systems. Their very low power consumption design enables several years autonomy. |
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Sensortechnics is a leading manufacturer and distributor of a wide range of sensors and fluid control devices. The product portfolio includes basic pressure sensors, rugged transmitters, submersible level sensors and customised pressure sensing systems from 1 mbar up to 1000 bar as well as liquid level switches, oxygen, flow and force sensors. Additionally, Sensortechnics offers ultrasonic air bubble, air-in-line, liquid level and fluid monitoring sensors and detectors. Fluid control devices include miniature solenoid valves and diaphragm pumps, electronic pressure controllers and custom specific fluidic control systems.
Sensortechnics has more than two decades of experience in providing highly customised sensing products and in the development of complex integrated fluid control systems for OEM customers worldwide. |
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A level control system consists of a sensor, controller, valve or pump and may be on-off or modulating. It is vital that your boiler water levels be monitored safely and accurately.
- Products compliant with all relevant European standards & regulations
- Safe working environment for your employees
- Reduce the risk of accident in the boiler house |
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Bühler Liquid-level control for external mounting NS 10/...-AM
The control of liquid level in reservoirs, gear boxes or other complex constructions often requires the use of controls than can be mounted externally with a visual indication of level.
The NS 10... range of level controls has been designed specifically for these applications. The visual level indicator is a standard item and has excellent visibility from any direction. The indicator itself is guided in a transparent tube and is moved by the magnetic field of the unsinkable float inside the stand pipe . The electrical contacts or a continuous level transmitter are mounted to the indicator scale. The contacts can be adjusted to any position.
The connection to the main structure can be by means of standard pipe fittings or flanges. Contact types MKS-1/W-L-24V are equipped with an LED.
compact dimensions
sight glass does not contain fluid
visual indicator
unsinkable float
infinitely variable adjustment
rugged design
optional continuous analogue signal 4-20 mA |
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Application description:
The conductive rod probe SAT in combination with suitable switching devices (e.g. fill level limit switch SRA-100, SRA-101, SRA 102, SRE-200) is used for limit value detection and niveau control in electrically conductive liquids. Also possible is the detection of overflow, dry run, humidity, flow.
Depending on the selected type, it is possible to realize up to 6 switching points. The longest rod operates as ground reference.
The connection housing is protected against splashing water IP65. |
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| The CS001 RF Capacitance Transmitter offers a compact and affordable solution to a wide variety of level sensing applications. With 4-20 mA and 0-5 VDC or 0-10 VDC selectable outputs, the solid state sensor provides accurate, proportional level measurement in many extreme process temperatures and fluid conditions. The CS001 features a simple, fully programmable four button calibration to set for whatever media it is measuring. Its 316 stainless steel probe comes in lengths up to 120" and is available in NEMA 4 or explosion-proof housings. |
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Our unique inverse frequency-based approach to capacitance technology ensures accurate, reliable and repeatable measurement even in dusty, turbulent, and vapourous environments, or in situations with product build-up. Because even a small level change creates a large change in frequency, our instruments provide better resolution and consistently outperform conventional devices. With special features such as Active Shield technology and modular probe options available on various models, they offer practical solutions to a wide variety of continuous level measurement challenges.
SITRANS LC 300
Capacitance level measurement instrument for liquids and solids, high accuracy applications such as food and beverages, pet food and bulk solids; ideal for challenging processes involving vapor and dust.
SITRANS LC 500
Capacitance level and interface monitor/controller for extreme and critical process conditions, such as oil and "liquid gas", toxic and aggressive chemicals and vapors. |
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The SC120 probe and CN200 level transducer can continuously measure as well as control the level in a wide range of applications. They can be used in conductive and non-conductive liquids, solids such as grains and feeds, as well as slurries. The SC120 probe sends an mV signal to the CN200 transducer, which converts the (mV) signal into a 4-20mA signal. Unlike the SC 404, the SC120 working with the CN200 transducer has two adjustable level controls in a scale of 0-100% with bar graph level indication, as well as a Zero and Span adjustment.
FEATURES
*Wide range of applications/industries
*I.e. liquids, oils, corrosives, solids such as powders and grains, etc.
*Functions on conductive as well as non-conductive medias
*No moving parts, rugged construction
*Easy economical installation, accurate and reliable measurement
*Unaffected by coating media or aggressive products
*Can operate ate high temperatures and pressures
*Available in 316S.S. threaded, sanitary and flanged process connections
*3A approved
Sitron's SC120 probes and CN200 transducers provide reliability, easy of use and installation. |
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The vessel, capacitance electrode and medium to be measured form together an electrical capacitor. The level change is monitored as a direct result of the variation in capacitance value around the probe, dependent upon the degree of immersion.
Advantages
- Rugged sensors suitable for universal applications
- High chemical resistance
Applications
- Level measurement and level detection of liquids and solids
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Products Level Measurement - Capacitive level sensors
All of the capacitive level sensors are now available with automatic calibration should the overall length need to be changed.
The required length can be easily adjusted by the user. Once the length has been shortened the unit will require to be re-calibrated. This is now very simple, just requiring the "Zero Adjustment" button to be pressed with the tank empty and the "Maximum Value Adjustment" button to be pressed with the tank full. The calibration is then done automatically by the integrated micro controller.
The advantages of these level sensors includes the ease of adjustment, voltage or current outputs, extremly robust by virtue of the coaxial measuring principle and a 2" BSP head. Additional switching points are available optional. |
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The SC700 series are capacitance point level switches ideal for detection or control of liquids, solids, heavy pastes or slurries. Unlike other capacitance probes, the SC700 works for any type of conductive, non-conductive or low dielectric materials with extremely accurate performance, almost complete immunity from build up, temperature changes or condensation. The rigid rod is made with a strong and durable plastic (polyacethal delrin) for standard units or upon request the rod can be made with PTFE.
Features
*Simple to install & low in cost
*No moving parts-maintenance free reliability
*AC, DC or a Universal power supply version
*Extended versions available with rigid rod or cable
*Operating temperatures 14 to 200ºF (-10 to 95ºC)
*Maximum pressure of 725PSI (50 bar) up to 8000PSI upon request.
*Sensitivity as well as Time Delay adjustments
*Does not require an external reference in plastic or concrete vessels
*Available in threaded, sanitary and flanged process connections
*3A approved |
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"Nivotemp 63 K + KN, 63 K-VA + KN-VA
Modern production facilities employ more and more plant automation systems and computerized controls. These allow the monitoring and control of hydraulic and lubricating systems. Traditional level controls are focused on pump protection i. e. a typical system is equipped with a level switch with one or two contacts. These contacts protect the pump from running dry in the event of leakage..
Modern systems provide the opportunity for a pro-active leakage control by the use of continuous signals.
An analog output of 4-20 mA signals continuous signals the fluid level. Deviations from the ""normal"" are detected instantly and can be transformed into many types of action. In case of a catastrophic failure such as a burst hose the pump could be shut down immediately rather then let it run until the traditional switch turns it off after a large volume of oil has spilt.
The Nivotemp 63 versions provide continuous analog signals for liquid level only or for level and temperature combined. They are available in two standard length or in 150mm increments. The flange dimensions are the standard ones used for filler/breathers ( DIN 24557/2). In addition the units can be combined with our Fluidcontrolterminal which makes oil care even more technically advanced.
The 63..VA versions are suitable for use with high water based liquids ( HFA).
easy, cost effective installation
continous level / temperature control
4-20 mA analogue outputs
flange standard
one cable for two functions" |
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Sitron´s line of Conductive Level Switches offer a wide range of customized options to meet any application's need. CL models are designed to control the level of all conductive liquid mediums with up multiple points of level detection. Models are available with Fixed rigid rods, Removable rigid rods, or with Pendular electrodes attached to the housing with cables. Applications involve both alarm point level detection as well as on/off pump valve control. Like all of Sitron's products, the series of Conductive Level Switches feature easy installation and maintenance free reliability.
Models:
Sitron has several types of conductive switches:
*The CLF has fixed rods and is available with up to five points (or more upon request) of level detection and control.
*The CLR has removable rods designed for easy handling and installation and is also available with up to five points (or more upon request) of level detection and control.
*The CLP has pendular electrodes designed for deep well or tank applications and is also available with up to five points (or more upon request) of level detection and control.
*The CLE is a single pendular electrode without the enclosure or the process connection.
These models are all used along with a (BS16 or CN16D) external controller . |
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Application:
For continuous level measurement in tanks containing fuel oil EL, L or
diesel. Specially suitable for underground tanks and basement tanks.
For liquid levels from 0.9 to 3 m.
Description
The hydrostatic level measurement system consists of an evaluation
unit with digital display (display unit) and a submersible probe with
integrated pressure measuring cell. |
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Trimod Besta level switch
The 3-modular design provides problem solutions for any application. The 3 modules – switch, flange and float module – can be supplied in countless variants and have proved themselves for years through their reliability in an extremely wide range of sectors (chemicals, petrochemicals, off-shore, power plant construction, shipbuilding, industrial installation).
Unlimited switch combinations
Whether mounted on the side, from above or in a bypass, the modular design always makes it possible to achieve switch combinations for specific applications. This modularity permits customized solutions. |
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Cls Besta – the universal level switch
The same level switch can be used for monitoring liquids, bulk materials and media interfaces. |
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SOLIBA Ex- GP Version (G: Gas and P: Dust)
High level detection in explosive environments classified 0,1,2 for gas and 20, 21, 22 for dust.
Especially designed to stop the filling of silos containing cereal, grains, flour, animal food, polyethylene granulate, etc.
Compact, resistant and simple device. Ready to be used. It does not need any maintenance.
This model is also available in only "P" Version (Dust). |
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Comus International has now added to their extensive range of switch and sensor products a range of vertical and horizontal plastic and stainless steel floats.
The range includes vertical and horizontal mounted single and multi float types including the side mounted crocodile type.
The float switches are compact, reliable and very easy to install. They are not affected by electrical interference and with a wide range of materials are able to withstand various chemicals, high temperatures and high pressures. By varying the size of float and material used we are able to make sure the switch activities correctly every time.
The activation of the switch uses the principle of a reed switch and magnet.
When used in the vertical position the reed inside the stem is stationary and the float (housing a magnet) is moved up or down passed the reed switch (this closes the reed contact). When the magnetic field is moved away the reed switch opens.
When used in a horizontal position the float is used in a pivotal movement. The magnetic field inside the float is moved into the proximity of the reed switch inside the stationary stem. The reed switch opens or closes.
For more technical information on these and over 800 switch and sensor products please contact the sales office.
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| Where fluids must be stored or handled the Barksdale level switches with their large variety from a simple com-pact switch to multi level stations with lengths up to three meters are a logic choice (longer on request). |
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| Due to specific tank layouts and the variety of media available in the pharmaceutical, chemical and automotive industry, a wide product range is required to ensure that all requirements can be met. A comprehensive modular system enables you to configure almost any level measurement solution possible. In exceptional cases where this is not possible, you can rely on the comprehensive development expertise of elobau. |
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Device designed to control the water level into pressurized or non-pressurized tanks.
- Fitted by two electric deviation switches, fast and non-vibration type with silver-plated contacts: one operating on the minimum level and the other one on the maximum level.
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Buy plastic float switches below $5.00!
Our FS01- is an economical choice for many general applications.
Polypropylene Float Switches offer an economical solution for general applications and are also good for many acids where chemical resistance is important.
Nylon Float Switches with Buna-N Float are ideal for petroleum oils and other fuel applications. This highly bouyant float switch is designed to be used in fluids with specific gravity of .5 or higher.
View the SMD "Application Notes" to check chemical compatability and specific gravity for your fluid. |
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BIP STOP VR ECO
By connecting it directly to the pump, this float level switch makes start and stop the pump.
110° switching angle that prevents excessive jerking of the pump's engine.
Biconical cover which avoids any risk of clogging. |
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Radar Level Meter for distance, level and volume of liquids, pastes and solids
OPTIWAVE
works better than any radar ever before.
In contrast to earlier radar devices, the new OPTIWAVE with its more advanced design solutions is able to operate over a larger bandwidth. This ensures a sharper resolution and higher accuracy. The higher signal dynamics of OPTIWAVE allow the detection of even the smallest level changes.
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| The externally-mounted Thermo Scientific LevelPRO continuous level gauge uses energy attenuation to accurately monitor and control the level of liquids, solids, foam and vapors in many different sizes and shapes of vessels. Its non-contacting design is ideal for abrasive, corrosive, high pressure and high temperature applications and the unique gamma transmission technology is unaffected by process variables such as pressure, temperature, viscosity or density. The LevelPRO features an integrated transmitter/detector that ensures high accuracy and enables operators to respond rapidly to variations in level. In addition, the extremely sensitive scintillation detector uses a small nuclear source yet provides highly accurate readings. The typical repeatability is 0.5% of the detector span. Standard detector lengths are available in 1 ft increments from 1 ft to 12 ft. Multiple detectors can be installed end-to-end to satisfy large span requirements. The LevelPRO is available in a standard steel enclosure, or an optional water-cooled enclosure for high-temperature installations. The instrument’s menu-driven setup simplifies installation. |
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Continuous Level Measurement
The external mounting and the non intrusive arrangement of a continuous level measurement are some of the outstanding advantages, that determine it for various applications like:
high- and low-pressure reactors
agitated vessels
bunkers
autoclaves
hot material containers, etc.
No matter, what the physical- and chemical properties of the measured product are nor what the shape of the vessel is.
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High frequency microwave impulses are coupled to a cable or rod and guided along the probe. The impulses are reflected by the product surface and received by the processing electronics.
Due to this measuring principle, the comprehensive adjustment with the product is no longer necessary. The instruments are adjusted to the ordered electrode length. The shortable cable and rod versions are suitable for individual adaptation to the local conditions.
Even process conditions such as high dust and noise generation or strong steamy atmospheres do not influence the accuracy of the measurement.
Density fluctuations, different granulation or even fluidising do not influence the accuracy. This applies also to the change from dry to wet gravel.
Strong build-up on the electrode or on the vessel wall does not affect the measuring result.
With measuring ranges up to 30 m, the sensors are also suitable for high vessels. Temperatures up to 150°C and pressures from vacuum up to 40 bar cover a wide application range.
By using a coaxial guide tube, VEGAFLEX 65 operates completely unaffected by vessel installations such as e.g. heating spirals or struts. A special adjustment is not necessary. |
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