M-ELL-SA External level switch is a non-contact level switch by using the Variable frequency ultrasonic technology, it is widely applied to all kinds of liquid level detection. The measuring probe is installed on the external wall of the container. And it belongs to a completely non-contact instrument which measure the level from outside of tank.
Working Principles of the External Level Switch
The measuring probe of the instrument can send the ultrasonic and detect the residual vibration signal in the wall of the container. The amplitude of the residual vibration signal will becomes smaller when the liquid is over the probe. A switch signal will be outputted after such change is detected by the instrument.
The Variable Frequency Ultrasonic Technology is invented by the DingHua and it is the world¡¯s leading ultrasonic signal change detection technology.
The main problem for the traditional ultrasonic level switch is that the ultrasonic signal can be interfered by the attachments from the tank wall and the amplitude of residual vibration signal can be changed by the drift of the temperature and time, thus the misinformation phenomenon is easy to appear. More owned the patent of self adaptive ultrasonic technology of variable amplitude variable frequency and it can effectively eliminate the interference and drift to test the changes of the signal correctly. So that it can be applied to a variety of complex site conditions, stable and reliable long-term work.
This product adopts the "micro vibration analysis" external sonar signal processing technology and leading manufacturing process, and ensure the reliability and durability of ELL-SA external variable frequency ultrasonic level switch.
Application
There is no need to open a hole on the tank wall to install the sensors when the ELL-SA series external level switch is installed. The instrument neither contact the liquid medium nor contact the gaseous medium in the container. Therefore, the installation is simple and quick, safe and secure. No need to clear the tank while repair and maintenance, no influence on the normal operating.
ELL-SA series external level switch is applicable to fixed-point liquid level measuring and alarm of all kinds of containers and liquid. It can be widely used in petrochemical, chemical, oil depots, oil, electricity, liquid storage, pharmaceutical and other industries. And it has a significant advantage in the pressure vessel, dangerous chemical liquids, flammable and combustible liquids and fixed-point liquid level measuring and alarm fields.
Product features
1¡¢Safety: the valves, communicating pipes, joints are not used in the measurement of poisonous, corrosion, pressure, easy to bums, volatile and leak liquid, and there is no leaks, no contact with the liquid and gas in the container, which is very safe. Even under the condition of instrument damage or repair, there will be no possibility for leakage, poisoning and explosion. (Measuring principle diagram)
2¡¢Easy installation and maintenance: There is no need for tank cleaning and open fire during the installation, no impact on production
3¡¢Durability and reliability: There is no mechanical moving parts in the sensor and instrument, strict sealing, isolation, will not wear or corrode.
4¡¢Widely applicable: It has nothing to do with the medium pressure, temperature, density, dielectric constant, viscosity, and presence of corrosion.
carton box and gift box, according to requirement
Supplier: Liquid level sensors, float switches,mechanical gauges
Thermal level switch
Optomax Industrial Glass Series Liquid Level Switches Description The Optomax Industrial Glass range liquid level switches can operate in aggressive environments due to their stainless steel and glass construction while offering industrial supply voltages and outputs that can directly drive loads. The microcontroller based Optomax Industrial Glass Range liquid level switches are solid state, incorporating an infra-red LED and phototransistor which are optically coupled by the tip when the sensor is in air. When the sensing tip is immersed in liquid, the infra-red light escapes making the output change state. The sensor can detect the presence or absence of almost any liquid type; oil or water based. It is insensitive to ambient light and is not affected by foam when in air or by small bubbles when in liquid. A range of N and P type output configurations can sink or source up to 1A at supply voltage ranges from 4.5 to 15.4Vdc or 8 to 30Vdc and can be configured to output a high or low signal in either a wet or dry state. Options for connecting to inductive loads or digital interfaces are also available. With housing threads suitable for external sensor mounting and for use in two operating temperature ranges; Standard (-25 to 80'C) or Extended (-40 to 125'C). LLG210D3-00x Liquid Level Switches FEATURES * Liquid level switches that can detect almost any liquid type; oil or water based * Suitable for harsh environments; robust stainless steel housing and glass tip * Choice of mounting threads LLG210D3-00x Liquid Level Switches BENEFITS * High power * Industrial supply voltage * Direct load drive
Liquid level switches Honeywell lle series alternatives For part numbers lle101000, lle102000, lle103000 and lle105000 Liquid level sensor llc101000 features * liquid level switches that can detect almost any liquid type; oil or water based * choice of mounting; internal or external * choice of threads Liquid level sensor llc101000 benefits * low power * low cost * compact design Liquid level sensor llc101000 echnical specifications Supply voltage (vs): 4.5vdc to 15.4vdc Supply current (ls): 2.5ma max. (vs = 15.4v dc) Output sink and source current (lout): 100ma Operating temperatures: -25'c to +80'c Storage temperatures: -30'c to +85'c Housing material: polysulfone Sensor termination: 24awg, 250mm ptfe wires, 8mm tinned
Supplier: Level measurement, level sensor, level switch, liquid level sensor
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Supplier: Liquid level measuring instruments: sensors and switches, level and temperature transmitters, flow meter, indicators, control units for different companies
Supplier: Combustible gas leak detector, toxic gas leak detector, liquid level controller, differential pressure switch, differential pressure transmitter, damper actuators
Services: Commissioning services, calibration services
Buyer: Pid controllers, electronic components
Product description Making use of the electrical machinery to bring blade revolving, when the medium rises to the blade position, the blade stops rotation because of the impediment of the medium, thus through the related control organization outputs Product specification/models Power supply: 220vac, 110vac, 24vac, 24vdc Contact capacity: 250vac/5a, spdt Operating temp.: -10~80 c( max. 800 c) Power: 3w Blade rotational speed: 1 rpm Balde material: sus304 Protection grade: ip65 Wire outlet: m20*1.5 Application Applicable to the manufacturing and processing equipment in the industry of food, feed, cement, plastics processing, basic engineering, chemical and chemical fiber, etc. Other information Installation method: Horizontal or vertical installtion
