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VOLUME -25 NUMBER 3
Publication Date: 03/1/2010
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March 2010 Issue
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Hermetic Switch Intros Proximity Sensors
Reed relay-type proximity sensors.
Chickasha, OK — Hermetic Switch, Inc. has introduced two new cylindrical (tubular) proximity sensors — PRX+3800 (Form B) and PRX+3900 (Form C) magnetic sensors, which deliver all the advantages of reed switch sensing technology but with smaller physical dimensions than previously available.\par \The new sensors respond to the need for components with smaller footprints, as size reduction trends continue in the systems and devices utilizing proximity sensors. The new sensors can be used in automation, control, or detection in a broad array of applications — including safety, security, alarm, equipment, machinery, manufacturing and processing systems — in industrial, commercial, medical, corporate, government or military settings.
Specific applications vary widely and include any number of situations — including extreme environments — where reliable and potentially long-term proximity monitoring is desired but physical contact must be avoided between the sensor and the object being sensed.
The PRX+3800 is a Form B (Single Pole Single Throw Normally Closed) reed switch contained in a temperature resistant cylindrical housing which has a nominal size of 0.125-in. (3.18mm) diameter and 0.750-in. (19.05mm) length. The PRX+3900 is a Form C (Single Pole Double Throw) or change-over reed switch with similar housing and dimensions. Both sensors are based on the company's HSR-502R reed switch technology and operate using a permanent magnet or an electromagnetic coil.
The sensors have an operating distance of 0.250-in. (6.35mm) and are rated at 2 watts. The maximum operating temperature is +105°C while the storage temperature range is -40 to +105°C. The sensors are insensitive to electrostatic discharge (ESD) which makes them especially suitable for applications where ESD is a concern. Custom wire and connector configurations are also available.
Contact: Hermetic Switch, Inc., 3100 Norge Road, Chickasha, OK 73018
405-224-4046 fax: 405-224-9423 Web:
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