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Loop detectors are used wherever vehicles have to be detected. For example for monitoring and safeguarding accessways or for counting vehicles. The output signal can be used for controlling door and gate drive mechanism, operating barriers, controlling traffic light systems in car parks or activating card dispensers in car parks.
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The Ramsey Microwave Switch/Plugged Chute Detector from Thermo is a safe, reliable and environment-friendly unit that can see through non-metallic wall build-up and detect the presence or absence of any material. It provides high and low level point level detection and can be used in many applications, including high temperature ones.
Product Detail
The Thermo Scientific Ramsey Microwave Point Level Detector is totally non-contacting, with a range from 10 cm (4 in) minimum to 150 m (492 ft) maximum. These reliable units can see through non-metallic wall build-up and detect the presence or absence of any material.
The switch can be used in pressurized coal down comers; electro-static precipitator hoppers; and in fly ash, clinker and coal transfer chutes. It provides high and low level point level detection.
High temperature applications are not a problem for this point level detector. Each unit is protected from the process by a polyethylene, ceramic or tempered safety sight glass window. The switch is a safe and environment-friendly replacement for nucleonic switches and is not restricted by OSHA or FCC regulations.
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Sonar Proximity Switches SIMATIC PXS
From 2,5 cm to 10 m - They Hear Everything!
Our sonar proximity switches sense objects of varying materials, shapes, colors or consistencies with absolute precision, flexibility and reliability. The application potential is almost unlimited. Whether recording fill levels or heights, measuring distances or counting bottles, our switches recognize objects with a wide range of properties from a distance of 2,5 cm to 10 m, regardless whether they are liquid, solid, powdery or even transparent. Surface conditions are irrelevant as well - they can be rough or smooth, clean or dirty, wet or dry. Our proximity switches feature maximum ruggedness and resistance against dirt, vibration and extraneous light or sound.
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Capacitive Proximity Switches SIMATIC PXC
Monitoring Fill Levels and More
Capacitive proximity switches also operate contactless and equally respond almost instinctively when conductive or non- conductive materials in solid, powdery or liquid states have to be measured. They are particularly convincing in monitoring fill levels through non-metallic materials such as plastic or glass, and in counting objects made of various substances.
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Inductive Proximity Switches SIMATIC PXI
Instinctive Response to Metal
When identifying metal objects without contact, inductive proximity switches are simply the most cost-effective solution. If an electrically or magnetically conductive object approaches or leaves, they automatically send out a signal change. Inductive proximity switches are extremely reliable with a high repeat accuracy. And thanks to wear-free operation as well as resistance to temperature, noise, light or water, they have a markedly long service life. We cover the complete application spectrum with a large variety of designs and transmission ranges.
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In all automated processes the use of sensors to provide information for the plc is of prime importance. Sensors supply the necessary signals on positions, end stops, levels or serve as pulse transmitters for counting jobs or for monitoring rotational speed. In industrial usage inductive and capacitive proximity switches are indispensable. As compared to mechanical switches they offer almost ideal conditions: non-contact, maintenance-free operation, high switching frequencies and switching accuracies as well as high protection against vibration, dust and humidity.
Inductive sensors detect all metals without contact, capacitive sensors detect nearly all solid and liquid media such as metal, glass, wood, plastic, water, oil, etc...
Both inductive and capacitive proximity switches are available in NAMUR versions. In conjunction with an NV0100/NV0200 amplifier the sensors can be used in zone 1 hazardous areas (the amplifier which contains Zener barriers as well as power supply and output must be mounted outside the hazardous area).
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Low cost and compact due to PMD technology:
- Non-contact distance measurement up to a range of 10 m.
- PMD Smart Pixel with integrated signal evaluation.
- Visible red light class II laser for easy alignment.
- 4-digit alphanumeric display.
- Simple set-up, installed and adjusted within seconds.
- 2 adjustable switch points, switching and analogue outputs.
- Robust and compact metal housing for industrial applications.
- Excellent price / performance ratio.
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Description
MK4 sensors are magnetically operated Reed proximity switches designed for screw mounting. The sensor should be mounted on a fixed surface with the actuating magnet on the moving surface. Introduction or removal of the magnetic field determines the closing and opening of the Reed Switch.
Features
Form A, B and C available
High power switches available
Other cables, connectors and colors available
Various case sizes available
Five operate sensitivities available
A choice of cable terminations and lengths are available
Applications
Position and limit switch
Pneumatic or hydraulic actuator position indication and end travel limit switch
Door and window contacts
Security system applications
Level Sensor (use with magnetic floats for water level detection in coffee makers, washing machines, dishwashers)
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Description
MK11 sensors are magnetically operated Reed Sensors with screw thread enclosure supplied with interconnect cable. The sensor should be mounted on a fixed surface with the actuating magnet on the moving surface. Introduction or removal of the magnetic field determines the closing and opening of the Reed Switch. The magnetic pull-in / drop-out sensitivity is divided into five AT ranges. A choice of switches, termination options and cable lengths is offered.
Features
Stainless steel and plastics designs with thread for space adjustment
High power switches available
Other cables, connectors and colors available
Various case sizes available
Five operate sensitivities available
A choice of cable terminations and lengths are available
Applications
Piston end travel and position detection
End motion detection for linear drives
Machinery industry
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Description
MK3 sensors are magnetically operated Reed proximity switches in a cylindrical module, with an )nterconnect cable. The sensor should be mounted on a fixed surface with the actuating magnet on the moving surface. Introduction or removal of the magnetic field determines the closing and opening of the Reed Switch.
Features
High power switches available
Other cables, connectors and colors available
Various case sizes available
Five operate sensitivities available
A choice of cable terminations and lengths are available
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Description
MK11 sensors are magnetically operated Reed Sensors with screw thread enclosure supplied with interconnect cable. The sensor should be mounted on a fixed surface with the actuating magnet on the moving surface. Introduction or removal of the magnetic field determines the closing and opening of the Reed Switch. The magnetic pull-in / drop-out sensitivity is divided into five AT ranges. A choice of switches, termination options and cable lengths is offered.
Features
Stainless steel and plastics designs with thread for space adjustment
High power switches available
Other cables, connectors and colors available
Various case sizes available
Five operate sensitivities available
A choice of cable terminations and lengths are available
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Description
MK17 are magnetically operated Reed proximity sensors for SMD mounting.
Lead design 1: Flat, straight leads for PCB mounting.
Lead design 2: Flat, bent SMD leads.
Lead design 3: J lead
The sensors are supplied taped & reeled according to IEC 286 / part 3 suitable for auto-placement. The special features of this series are the small dimensions of only 12.5 x 2.1 x 2.1mm and the simple internal structure (low cost version).
Features
Two operate sensitivities available
Tape and Reel available
Excellent for low power operations
No external power required for sensor operation
Applications
Electronic PCB's where all components are surface mounted
No power-requirement sensor for low power applications
Telecommunication applications
Hook switch in mobile and hard wired phones
Switching element in microphones
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- Non-Contact Measurement for Distance / Motion / Vibration
- Absolute Position Sensing
- Sub-Nanometer Resolution
- Measurement Ranges to 500 µm
- Easy Integration
- High Bandwidth
The new PISeca™ single-electrode capacitive sensors from PI perform non-contact meas-urements of distance, position or motion against any kind of electrically conductive target. They feature the highest resolution and linearity available.
The PISeca™ single-electrode capacitive gauges are fundamentally very temperature stable, have excellent dynamics and are easy to work with.
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Proxistor capacitives produce an electric field with which they detect electrically conducting or non-conducting materials, solids particles or liquids, without making contact. Target detection is not affected by colour. Almost all Proxistor capacitives feature adjustable sensitivity allowing them to be set-up to differentiate between materials or compensate for varying mounting conditions.
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Capacitive proximity sensors react to metals and non-metals that exceed a specific capacitance on approaching the active surface.
The sensing distance with resprect to a specific material is greater the higher the dielectric constant.
The sensors are used to detect objects, for counting functions and for all types of level monitoring applications (liquids and solid materials.
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Capacitive proximity switches are designed for non-contact and wear-free detection of metal (electrically conductive) and non-metal (electrically non-conductive) objects.
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In all automated processes the use of sensors to provide information for the plc is of prime importance. Sensors supply the necessary signals on positions, end stops, levels or serve as pulse transmitters for counting jobs or for monitoring rotational speed. In industrial usage inductive and capacitive proximity switches are indispensable. As compared to mechanical switches they offer almost ideal conditions: non-contact, maintenance-free operation, high switching frequencies and switching accuracies as well as high protection against vibration, dust and humidity.
Inductive sensors detect all metals without contact, capacitive sensors detect nearly all solid and liquid media such as metal, glass, wood, plastic, water, oil, etc...
Both inductive and capacitive proximity switches are available in NAMUR versions. In conjunction with an NV0100/NV0200 amplifier the sensors can be used in zone 1 hazardous areas (the amplifier which contains Zener barriers as well as power supply and output must be mounted outside the hazardous area).
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The capacitive sensors with extreme long sensing distance are based on the three-electrode measuring-principle. this measuring principle allows much larger sensing distances compared to the two-electrode principle of common capacitive sensors, up to 10-times the norm. Although one achieves essentially larger switching distances with these capacitive systems, the size of the sensors is small.
KXS-Systems are used for applications where the sensing distances of standard sensors are not sufficient.
A further feature is the Duplex-or Triplex-operation. With the corresponding evaluation unit it is possible to adjust 1, 2 or 3 switching points with only one sensor.
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Capacitive sensors (KAS) react to metals and non-metals that exceed a specific capacitance on approaching the active surface. The sensing distance with respect to a specific material is greater the higher the dielectric constant. The sensors are used to detect objects, for counting functions and for all types of level monitoring applications in liquid materials (i.e. water, oil, acids, glue) and bulk materials (i.e. pouder, granulate, pellets).
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In industrial processes where liquids, air or gases are used valves serve for dosing and control. There is a wide variety of valve types, butterfly or ball valves being the most common quarter-turn types.
In large plants these valves are seldom operated manually. Mechanical actuation is normally done by separate actuators. The valve position must be monitored electronically. This is necessary to give feedback to the controller when a certain position (e.g. "open" or "closed") is reached and to monitor the valves centrally from a control room.
Mechanical switches are still often used for position feedback on the actuator shaft. For other solutions several proximity switches are used together with a switching target for position detection. Disadvantage of these solutions: Mounting is mechanically complex. During switch mounting the signal wires can be reversed when they are connected in the top-mounted junction box. Where there are temperature fluctuations condensing humidity leads to corrosion and thus malfunction.
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Inductive Sensors
Inductive proximity sensors are the preferred choice for the majority of applications requiring accurate, non-contact detection of metallic objects in machinery or automation equipment. As a pioneer and market leader, Pepperl+Fuchs offers innovative, high quality inductive sensors to meet the needs of the worldwide automation and process control markets. Our experience, flexibility and customer focus continues to allow us to offer custom designed solutions for the most unique and demanding applications.
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Inductive proxistor's detect the presence of ferrous or non-ferrous metals without making contact and offer metal sensing unaffected by dirt, oil humidity & dust. This makes them particularly suitable for use in both the machine tool and general manufacturing environments where they are present in great volume and variety.
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Inductive sensors (IAS) feature transistorised oscillators whose power consumption is influenced by the approach of metals and other electrically conductive materials such as carbon. Non-conductive metals can also achieve this effect.
These devices can be used as limit switches and position sensors for monitoring and positioning applica-tions in machines and installations as well as pulse generators for counter systems, distance measurements, speed control and many other applications
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Features
Compact design
Metal connector
Ring-diameter 6mm to 100 mm
Static operating principle
High resolution
Short response time
Pulse stretching adjustable
Short-circuit protection
Protection class IP 67
Typical fields of application
Applications in the assembling technology and supply automation, e.g. detection and jam control of small metallic parts in feed hoses.
Wire break detection etc.
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General description
di-soric infrared distance sensors OAA... are characterised by a large operating distance, while having a very good colour independence.Thanks to the large diameter of light spot uneven surfaces of stones, sintered material or rough boards will be safely detected. Due to that di-soric infrared distance sensors OAA... are especially suitable for height control in concrete and gravel works, brickyards as well as saw mills. Two independently from each other adjustable thresholds enable diverse operation possibilities.
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With our new Laser-Distance Sensors DLS-B you measure absolute distances up to 500 meters. Thanks to state of the art laser technology the DLS-B device measures with a precision of 1.5 millimeters. It represents a cost efficient solution even at extreme environment temperatures as low as -40° C.
The DLS-B is an optical measuring device. You can measure, maintenance-free, distances on natural and reflective surfaces. You determine positions on objects difficult to access or with very high surface temperatures. Just as well you can measure distances in an aggressive environment in an easy and accurate way.
Serial, analog and digital interfaces are standard features for the complete DLS-B product line. This enables you to easily connect the DLS-B to a control system (SPS, IPC or PC)
The DLS-B device runs in a “Stand-alone-mode” and independently executes all programmed functions. Thanks to the flexible range of functions an external display can be connected directly to the DLS-B device via interface RS232 or RS422. Via a digital input, measurements can also be activated from an external button or switch.
For easy configuration of the DLS-B devices, the necessary software is at your disposal.
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The laser distance sensors of the L-LAS-LT and L-LAS-LT-MS series determine the distance or thickness of objects with highest accuracy. By way of a master/slave sensor arrangement, two laser distance sensors are evaluated by a controller that is integrated in the master sensor. A special version is available for optically transparent objects (flat glass, foils, wafers).
The laser distance sensor can be easily parameterised with the Windows® user interface L-LAS-LT-Scope or L-LAS-LT-MS-Scope.
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The new SMAT continuously detects the position of the cylinder piston within a range of 50 mm. It has an analogue output with an output signal in proportion to the piston position. The integrated OOR (out-of-range) sensor indicates if the piston is outside the sensing range. The connection for evaluating the 0 … 10 V and/or the 4 … 20 mA signal is made directly to analogue inputs.
Typical areas of application in object detection are as follows:
Press-fitting, clamping, position sensing, workpiece replacement
In process monitoring:
Sheet metal handling/production, wear monitoring, quality inspection
- The installation direction of the SMAT in the slot can be chosen freely.
- Contactless measuring principle = wear-free sensing.
- Measuring range is always 50 mm, regardless of cylinder; reproducibility 0.1 mm.
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Features
All-electronically or reed contact
MZEK... can be fitted from above
MZ C... for Cylinders with 4 mm round slots
Absolutely wear-free
High reproducibility
Metal Case
Connecting Cabel 2,5 m (5 m) PUR or 0,3 m (0,6 m) PUR with knurled connector M8
Bright LED
Short-circuit-proof
Polarity-safe
Protection class IP 67
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elobau sensors are the first choice when it comes to robust explosion-proof switching elements. Proximity switches are available either as an intrinsically safe version with screened PVC cable or as an encapsulated version with optional potential terminal.
elobau ATEX switches are suitable for use as:
Intrinsically safe version
- Cat. 1 G (ia) for zone 0 (with screened PVC cable)
- Cat. 2 G (ia) for zone 1
Encapsulated version
- Cat. 1/2G (m) for zone 0/1
- Cat. 2 G (m) for zone 1
- Cat. 3 G (m) for zone 2
- Cat. 2 D for zone 21
- Cat. 3 D for zone 22
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