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In order to eliminate false alarm given due to medium with high viscosity sticking onto the probe , a special material acting as an insulation electrode have been added in between the active section and the grounding section.
As shown in the diagram, sensing probe always experience medium clogging on it and thereby produces a capacitance and resistance between the 3 parts. Since the electric field between the active section and the guard section is round shaped, there will be no current passing through the medium between the electrodes.
The Admittance level switch uses this principle, to add a guard section between the active section and the grounding section to block the admittance current to reach the vessel wall from the medium between the active section and grounded electrode. Although there would be a small amount of admittance current between the guard section and the active section, the circuit would not take this current value into account. Due to the guard section, only the admittance current change between the active section and the tank wall will be detected by the circuit, thus only when the sensing probe is in contact with the medium will there be a precise signal.
Features
Not affected by material coating on the sensing probe.
Easy installation.
Stable operation, not affected by temperature.
Time delay function of 0~90secs.
Housing protection: IP65.
DPDT /5A output.
Maximum temperature: 550C.
High / Low fail safe selectable features.
Applicable in liquid, syrup, solid, grain and interface detection.
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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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This comprehensive range of bypass level switches are suitable for high pressure accumulators in water hydraulics, for transmissions and turbine housings as well as numerous applications for onshore and offshore (with DNV and GL approvals). These units combine the visual level indication with electrical signals either as switches or continuous signals.
Level indicators with an operating pressure up to 320 bar are approved according to the German pressure vessel regulation.
Level switch NS 1 / G 1/2 AM series
Transparent sight glass with integrated electrical level control
Adjustable level contacts
Compact physical dimensions, easy installationvarious electrical
Connectors available
This series has been designed particulary for gear boxes and can be also equipped with continous level controls.
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Applicable in environments with high temp., high pressure, strong acid, strong alkali and hazardous locations.
The structure is simple but durable and reliable. It is also with various optional devices for upgrade in use.
A Level Transducer or Magnetic Switches can be installed and adjusted with no need to stop any process.
It is not operated by electricity and with not be affected by power failure.
The flag display is scaled by a piece of color, division every 10cm, one can easily read the levels height.
Multiple applications for textile dyeing, sewage water processing, power generating, hot coal oil boiler and petrochemical industries.
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Cable Float Level Switch
Float material available with plastic and stainless steel
Micro switch, Proximity Switch, Reed Switch and Mercury Switch available
Simple installation and durable
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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 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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These are used where it is necessary to control with a high degree
of security the level of non conductive substances both liquid
and solid.
They are particularly used for controlling the level in silos for
cereals and foodstuffs, in feed plants, foundries and cement
works.
They function in the vicinity of the material to be controlled.
-Supply voltage 24 Vac or 110/220 Vac
-Relay output with 1 pole changeover from 5A to 220 Vac.
-Led incorporated
-Sensitivity adjustment
-Selector of min/max level
-SC series with power supply-amplifier incorporated within probe
-SCD series with power supply-amplifier separated from probe
-SX2 type with power supply-amplifier in plastic body
-Bar electrodes of teflon in standard lengths of 300/500/800 mm
-Plastified cable electrodes in standard lengths of 1/2/3/4
metres
-Housing in aluminium alloy with threaded fitting 1.1/2 inch GAS
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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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Mainly based on the float switch design, these controllers help to monitor the liquid level (as combined units they monitor both liquid level and temperature) in oil reservoirs of fluid power and lubrication systems.
Attached to the tank top cover, they penetrate directly into the hydraulic fluid or the lubricant.
Each of the following series offers particular features and details culminating in the extreme density of functions offered by the Multiterminal.
Level switch Fluidcontrolterminal series
High number of functions reduces requirements for installation, space and cost
Adjustable level contacts
Connecting flange according to DIN 24 557 part 2
Directly attached electronic contact thermometers optional
The FC terminals offer the functions of tank breathing, level/temperature control, filling and topping up and oil sampling in a very compact design.
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Level and temperature switch
Multiterminal
All basic functions in one unit:
Return line filter
Breather filter
Level and temperature controls
Filling port (optional with electrical close loop shut off)
Sample ports
Advanced filter capacity controller
The very compact design saves space and installation cost.
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This instrument is suitable for controlling the level of a large
number of electrically conductive liquids (water, chemical solutions
and solid conductive materials) and can be used in the chemical
textile and wine making industries as well as civil and industrial,
plants irrigation and water treatment.
-Supply voltage: 110/220 Vac (CL1001/U type)
-Supply voltage: 24-110-220 Vac (CL1001/0 type)
-Relay output with 1 pole changeover 5A to 220 Vac
-Sensitivity adjustment from 2 to 40 Kohm (higher upon request)
-Plastic housing with OCTAL or UNDECAL plug
-Type CL1001-R5 with wave delay
-Type CL1002 with relay output 2 pole changeover 5A to 220 Vac
-Led incorporated
-Detector CL1N is used for level control of wells and tanks
-Detector CL-A with stainless steel and teflon housing for high
pressure and high temperature applications (boilers, autoclaves).
These can be supplied with standard electrode lengths
100/500/1000 mm.
-Two pole detector type CLK-A with stainless steel body supported
by a teflon coated element provided with a three pole connector
for the electrical connection, two poles are connected to the
electrode and the third earth pole is connected to the thread
stainless steel holder.
-Three pole detector CL3-A with plug for three electrodes
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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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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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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 100C, short term up to 120C, 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 200C. 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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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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* P/N:12345
LSAZ-90 horizontal level switches, This is a stanard level switches, are ideal for sensing condensate tray level in heating, venting and air-conditioning systems. Feature high reliability and compact, miniature design, making them suitable for use in tight spaces. SUS304 or SUS316L material can be selected.
* P/N:12345
LSA-34-1/2-300-P float level swiches, Made of plastic, low cost, with M10 threads, applied to aerospace, air compressors, buck storage tanks, chemical dispensing systems, commercial restaurant industry. Chermical liquid level controlling.
* P/N:12345
LSA-27-1/2-300-P float level switches combine low cost and reliability with fast simple installation, used for chemical processing systems, sumps, collant tanks, oil reservoirs fuel or water tanks sterilizing equipment, irrigation systems
* P/N:12345
LSA-40-1/2-300 float level switches, Made of SUS304 or 316L, Typical installations, such as pipe plug, flange, and thread, Bulkhead etc is selected. Normally closed, or Normally open is selecthigh, low, middle liquid level sensing for almost any application, applied to aerospace, air compressors, buck storage tanks, chemical dispensing systems, commercial restaurant industry, parts washers, power generation equipment, petrol and diesel pumps control and prevent, commercial coffee machine.
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BIP STOP VR ECO - Neoprene or hypalon cable HO7RN8-F certified
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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* LST-500 Level transmitter :
A stainless steel version of its continuity output ESS, specifically for use in food industry applications. And is suitable for applications, requiring more precise level sensing than that provided by multipoint switches. And can be fitted externally 2NPT connection or externally an flange. The operating temperature range is -30to +125. The working pressure is 1.0 to 2.5 Mpa, testing rod length is 500mm. LCD disply, Providing a continuous output 0~5Vdc or 4~20mA.
* LST-1000 Level transmiter :
New developed a stainless-steel version sensor, its continuous output signal is (0~5Vdc or 4~20MA), the sensor combines the proven reliability of magnetic reed switching with resistors net worked to provide a variable output proportional to the float position (Liquid level). Testing rod length is 1000mm, standard flange mounting.
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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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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 instruments menu-driven setup simplifies installation.
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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 pr | | |
