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Resistive sensors emit a virtually linear and continuous signal which, controlled by a suitable instrument, indicates the level of fluid in a tank
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NC 56
Principles of Operation
Two parallel metal rods with a fixed distance between them form a capacitor when charged with an A.C. voltage.
When these rods are immersed in a liquid medium, the capacitance value is a function of the immersed length. With the probes fixed vertically downward, the immersed length is proportional to the liquid level. Capacitance of probes is therefore a function of level. An electronic circuit module within instrument converts the capacitance value to a level measurement and transmits as a linear standard electrical signal: 0-20 mA, 4-20 mA,0-10 V DC, 0-5 V DC, 1-5 V DC or 2-10 V DC.
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Application
Suitable for detecting levels of
powdered and finely grained bulk
solids or of liquids. Especially
suitable for use in silos, hoppers,
tanks and containers.
Description
The CapFox® ENT 7 capacitance
level switch forms with its associated
probe a single compact unit.
The unit can be supplied with either
a flexible or a rod probe. The probes,
rigid or flexible (tensioned if
required) can be mounted horizontally,
vertically or at an angle.
Flexible probes can also be retrofitted
to the unit via an adapter.
The sensitivity is adjustable.
CapFox® ENT 7 features a voltagefree
relay contact which switches
when the pre-set level is reached.
The relay contact is used to control
ancillary electrical equipment such
as conveyors, slider valves or flaps,
pumps or blowers, visual or audible
alarms, or as an input to a PLC.
Minimum or maximum fail-safe
mode can be selected according to
process requirements.
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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 AFRISO-EURO-INDEX PMG 01 and PMG 02 guided micropulse level measuring systems are used for the continuous measurement of distances, volumes and levels of liquids, powders and granulates in containers, silos or tanks.
The measuring method works with changing media without requiring time-consuming recalibration. Turbulent, steaming or dusty surfaces as well as changes in density, pressure or temperature do not affect the measuring accuracy.
PMG 01 is suitable for medium temperatures from -30°C to +200°C. PMG 01 features 2-wire technology, is supplied with DC 20-29V and has a 4-20 mA output (HART).
The 4-wire technology PMG 02 unit is also suitable for interface measurement in containers with heights of up to 40 m. It is supplied with AC 230V (DC/AC 24V optional) and is available with an RS 485 interface or Profibus PA. A display that can be integrated provides information directly on site. The units are also programmed from here.
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Fuel level sensor DUT-E
Function
Precision fuel level sensor DUT-E is designed for precision fuel level measurement in tanks of vehicles, trucks, tractors, road-building machinery, fixed installations.
DUT-E is used as a standard fuel level sensor or as an additional sensor together with AVL, FMS or vehicle tracking systems.
Mounting
DUT-E has the standard SAE 5 bolted flange and is mounted in the standard hole of the fuel level sensor or the special hole in the vehicle fuel tank.
Advantages
-Electrical noniteraction with tank body;
-Allows cutting %u201Cat place%u201D up to 30% of its initial length without recalibration;
-Strong cast metal body;
-Protection of sensor output from short circuit;
-Protection from voltage overload (up to 50 V);
-Sensors are delivered calibrated, i.e. sensors are interchangeable and there is no necessity to make tank normalization when you replace DUT-E sensor;
-Stable and more exact output signal;
-New bayonet lock and small overall dimensions of the outside sensor part;
-Possibility of sealing.
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Gill Fuel Level Sensors use capacitive technology to accurately sense the level of fuel. The sensors have no moving parts and are ideal for use in extreme environments. All sensors feature fully integrated on-board electronics so there is no need for additional bulky electronic modules. The sensors are factory calibrated in the applicable fuel and are provided with our free ProbeMON calibration software to allow you to re-calibrate the sensors to your requirements.
Our fuel level sensors will operate to temperatures of 125°C and are compatible with all grades of:
- Petroleum
- Gasoline
- JetA
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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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Level sensors are used to detect the level of liquids. In contrast to mechanical limit switches the switch points can be freely selected within the measuring range. One level sensor can replace up to four binary switches. Another advantage is direct level indication on the display. Adjustment to the medium is done automatically. The sensor is suitable for many liquid media.
> Reliable function even in coolant applications
> No time-intensive cleaning of mechanical components
> One sensor for all media – no adjustment necessary
> Selectable switch points for applications as required
> Direct level indication by LED display
> Modular concept saves time and money
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Ink Level Sensor, Adblue Level Sensor, LAB Level Sensor, Paint Sensor
The 'other' level sensors categorises liquids not covered by our 'fuel', 'oil', 'bio-fuel' or 'water' level sensors categories. Our level sensors will work with most fluids, using capacitive technology to accurately sense the level of the liquid. The sensors have no moving parts and are ideal for use in extreme environments. All sensors feature fully integrated on-board electronics so there is no need for additional bulky electronic modules. The sensors are factory calibrated in the liquid type and are provided with our free ProbeMON calibration software to allow you to re-calibrate the sensors to your requirements. We can produce sensors using alternative materials if the standard Aluminium, Stainless Steel and Titanium options are not compatible with your liquid.
Our level sensors will operate to temperatures of 125°C and are compatible with most fluids:
- Ink
- Adblue
- LAB
- Paint
We offer two ranges of level sensors, 'M-Series and 'R-Series'. An M-Series sensor is fully custom designed to your requirements, an R-Series sensor is our standard design, available at any custom length.
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Limit switch made of plastic for liquids and bulk goods
CPS 01
Features:
Quick and easy setting via programming by keystroke
Electrical connection: Cable or plug M8
PNP transistor output Housing made of PP or PVDF
Make contact or break contact
Outstanding price-performance ratio
Functional LED display Small and compact
Thread BSP G½"
Description:
Immersing the CPS 01 into the medium will cause a change in capacitance in the electrical capacitor. The change in capacitance is detected by the electronics and the switching operation is initiated.
Adjustment to the corresponding medium is carried out with the help of a programming key (programming via keystroke).
Application:
Designed for level limit detection of liquids and powdery or fine-grained bulk goods.
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The capcitive filling level systems operate according to the three-electrode principle. With this principle the container or an additional electrode serve as a counter-electrode to the probe electrodes. For this reason it is necessary with this system that the container is of a conductive material or a "substitute electrode" is fixed to the container wall, e.g. copper foil. These systems are available with probes for analogue filling level measurement of for detection of 1, 2 or 3 measuring points. The position of the switching points and the analogue measuring area is user-definable within the possible effective range and therefore it can be determined for optimal matching of each application. Level measurements of bulk material, liquids or pastes are possible with a dielectric constant as of εr 1,1.
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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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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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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 sensors and switches, flow, oxygen and force sensors. Additionally, Sensortechnics offers ultrasonic air bubble, air-in-line, liquid level and fluid monitoring detectors. Fluid control devices include miniature solenoid valves, diaphragm pumps and electronic pressure controllers.
Sensortechnics has more than 25 years 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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CONTINUOUS LEVEL MEASUREMENT
capacitive level probes for liquids and bulk materials in high-grade steel or plastic
Exit 4-20mA,
for vertical installation,
for aggressive media,
Remarks with removable head and exchangeable or shortenable probe staffs
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LLS 20160 DIGITAL fuel level sensor for vehicle tracking and telematics
Fuel level sensor LLS 20160 is intended for determining the level of light oils and other liquids in metal and non-metal vessels. Fuel level information is transmitted to on-board equipment of monitoring systems periodically or upon request.
The main features of the fuel level sensor LLS 20160:
- probe length from 100mm to 3000mm
- adjustable length in field conditions
- long-term stability of measurements
- built-in galvanic decoupler
- interfaces RS-232 and RS-485
- resolution 1023-4095 points (adjustable)
- data transmission rates from 1200 to 115200 bps
- powered from on-board power system, power supply 7-50 VDC
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The capacitive working LevelCheck 350C builds up a high-frequency, electrical field over the sensor surface.
If materials touches or is close to this field, the electrical field changes and the electrical signal changes within the sensor.
This is converted into a switching process. The sensitiveness of the sensor can be adjusted continuously to the adaptation
to different products.
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Fully insulated, capacitive rod electrode for level measurement
For use in conductive liquids
All advantages in an overview:
- robust and maintenance-free
- easy installation and mounting
- measurement along the complete probe length
- insulation thickness 2 mm
- instrument from the plics® family
Version rod: - fully insulated
Insulation: PE, PTFE
Length: 0.1 ... 6 m
Process fitting: thread from G¾A
Process temperature: -50 ... +200 °C
Process pressure: -1 ... +64 bar (-100 ... +6400 kPa)
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Level sensor acc. to the measuring principle of the guided microwave (TDR)
For universal use in heavy solids and liquids
All advantages in an overview
- setup without adjustment
- independent of product features
- insensitive to dust, vapour and buildup
- probe can be shortened
- signal processing ECHOFOX for echo analysis with Fuzzy-Logic
Version: with exchangeable cable (ø 6 mm) or rod (ø 16 mm)
Measuring range cable: up to 60 m; rod: up to 6 m
Process fitting: from G1½A
Process temperature: -40 ... +150 °C
Process pressure: -1 ... +40 bar (-100 ... +4000 kPa)
Accuracy: ±5 mm
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External display and adjustment unit
Suitable for external display of measured values and adjustment of the sensors
All advantages in an overview:
- digital and quasi-analogue display of measured values
- can be mounted up to 25 m away from the sensor
- inclusive PLICSCOM
- instrument from the plics® family
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Potentiometric level measurement
- Fields: Chemical and Petrochemical Industry / Food and Beverage Industry
- Type: LSP05x
- Measurement ranges: -20...140°C
- Operating pressure: max. 16 bar
- Type of protection: IP67
- Connecting head / Material: Head ø89 mm, W1.4301 (AISI304) / Wetted Parts, - W1.4404 (AISI316L) / 3A Approval
- Output signal: 4...20 mA
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LN Potentiometric Level Transmitter
A top mount insertion probe, the LN is designed with process control in mind. Ideal for filler bowls, balance tanks, and pressurized vessels, the LN is immune to pressure or temperature changes excelling in applications where pressure based sensors come up short.
Form AIC
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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 900 to 3,000 mm..
Description
The hydrostatic level measurement instrument consists of an evaluation unit with digital display (display unit) and a submersible probe with integrated pressure measuring cell.
DIT 01 features the following:
• Universal application in tanks with up to 3 m in height or diameter.
• No dip charts required since all standard tank shapes are stored.
• Fast and safe mounting with complete installation accessories.
• No external supply voltage required.
• Push-to-read function for extremely long battery service life.
• High accuracy of measurement due to electronic sensor (pressure measuring cell).
• Display unit with easy-to-read display.
• Simple operation via menuguided set-up procedure.
• Connection cable of the display unit can be extended by up to 10 m.
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Ganter has for many years been a well-known supplier of oil sight glasses made of plastic and aluminium. The range of products has now been enlarged to include oil sight glasses made of stainless steel and brass. In addition, an “ATEX” sight glass made of aluminium has been developed
for use in explosion hazard atmospheres which is available in three sizes with different threads, complying with the directives of the European Union for explosion protection.
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Systems of assembly for tubes EMILE MAURIN the systems of assembly are elements of tightening which make it possible to build gauges, installations and operating systems at the same time easily and quickly by using sections of standard tubes, round or square. The very broad nut range of tightening cast solid or made up of several elements offers almost unlimited possibilities. The nuts of cast solid tightening allow very robust tubular constructions. In this case, one will use tubes of precision with an external diameter which remains in tight tolerances. The nuts of tightening made up of several elements are not indicated for tight tolerances because they can also be used with tubes of square section, which allows integration already existing systems.
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The Liquid Level Gauge has been introduced to complement our range of liquid level sensors. The gauge is available for most liquid types (fuel, oil, water...) and can be etched with other data labels if necessary. The gauge has been designed with special features including fully configurable scaling, adjustable electronic damping and a fully adjustable low level warning indicator. Additional features include auto-dimming control and multi-coloured LEDs ensuring this device can be seen in all lighting conditions.
- Fully Configurable
- High Accuracy
- Low Level Warning
- Low Height and Recess Profile
-Simple Installation
- Lightweight
- Light Sensitive Auto-Dimming
- Available in Fuel, Oil, Water variants (plus others)
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Self Adhesive Level Indicator Labels
Simply stick the Self Adhesive Level Indicator Label on the fire extinguisher, overlapping the calculated level. Apply heat to the label for a few seconds and see the level clearly indicated.
Standard temperature range: 0-27°C, (Purple & Blue)
Higher temperature range: 25°C - 35°C (Blue)
Sizes: 25mm x 250mm and 25mm x 500mm long.
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