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An presence detector is always comprised of one transmitter and at least two receiver chips with high quality optical systems. These are mounted on the sensor's PCB (modular system) or integrated into a pre-assembled housing (individual sensors). The scanning range is set by means of a mechanical micro-speed unit by changing the angle between the transmitter and receiver. This optical procedure is called triangulation or optical differential measurement. Several beams can be combined in the modular system to form lines.
Presence detectors are ideal for edge and pinch protection on revolving and sliding doors and as ride-along anti-collision protection on swing doors. They can also be used for small areas such as kitchen and service areas of restaurants and hotels or as a person counter in shopping centers.
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Sensors using socalled "combined technology" have two or more different technologies combined in one unit. With this combination the disadvantages of each individual technology can be compensated and at the same time their strengths are conjoined for the applications' ideal performance.
Combined technologies are used for the combined activation and safety at automatic doors. Besides, these sensors offer plenty of auxiliary functions which contribute to a substantial enhancement of the comfort around the door.
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MICROWAVE
Uses a high frequency radio transceiver through an adjustable planar antenna.
Detectors may be set to be either omnidirectional or unidirectional detection depending on application and may be used to detect the direction of passage (in or out). Microwave detectors may be made on medium to large areas for automatic doors, rapid vertical doors, industrial doors or security installationsl
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Microwave Sensor with Unidirectioonal Detection Function
The EZ+ has a selectable unidirectional detection function. Use this function to avoid extra load on building air conditioning etc.
Provides Three Types of Detection Area Settings
Simple Detection Area Adjustment and Modification
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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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