Inductive, capacitive and ultrasonic proximity sensor models, all of which offer you no-touch object detection….
Allen-Bradley Proximity and Presence Sensors
The diverse Allen-Bradley offering serves the full spectrum of customer needs, from light-duty packaging applications to the punishing environments on automotive welding equipment or the harsh washdowns in food processing plants.
Presence Sensors detect the location of objects or personnel near hazardous areas. The Types are …
Radio Frequency Identification Devices (RFID), Inductive Proximity Sensors, Capacitive Proximity Sensors, Ultrasonic Sensors, Photoelectric Sensors and Safety Devices.
WorldProx Tubular General Purpose Sensors
Cost-Effective and Comprehensive Solutions for a Wide Range of Non-Contact Presence Sensing Applications
“Inductive Proximity Sensors detect metal objects without touching them. This technology is used in applications where the metal object to be detected is within an inch or two of the sensor face.”
Ring and Slot Sensors are specialty inductive sensors that determine the presence of metal objects passing through them.
Oki Sensor Device is a specialty manufacturer of reed switches and related products developed specifically to respond to these user needs.
OKI Sensor – Reed Switches and Sensors
Products include Reed Switches, Proximity Switches, Shock Sensors.
“The reed switch was invented by Dr. W. B. Ellwood at Bell Telephone Laboratories in 1936. The first application was made during 1938 when the reed switch was used as a selector switch in coaxial carrier equipment. Later, improvements of the reed switches were made in parallel with the development of the telecommunications technology.”
“Structure and Operating Principles As shown in Figure 3.1, the reed switches comprise two ferromagnetic reeds placed with a gap in between and hermetically sealed in a glass tube. The glass tube is filled with inert gas to prevent the activation of the contacts. The surfaces of the reed contacts are plated with rhodium.”
from The Oki Reed Catalog
OKI Introduces High Switching Current Reed Switch This device achieves industry-first 5 A maximum carry current and 2 A maximum switching current with glass tube length of 16.5 mm
High current reed switch, ORD872
Oki Sensor Device Corporation.
Tachihi Bldg. No7 4th Fl. 6-1-1, Sakae-cho, Tachikawa-shi, Tokyo 190-0003, Japan