Reed Relays and
Electronics India Limited
Manufacturer of Reed Switches, Reed Sensors and Reed-based products
Reed Relays and Electronics India Limited Incorporated in 1971

Magnet sensors for Automobile Cruise Control

Reed switches in speedometers
Cruise Control

Cruise Control automatically controls the speed of a motor vehicle by adjusting the accelerator so that the driver need not keep it depressed on long drives. For the central microprocessor to maintain a set speed by adjusting the throttle when the road gradient changes, it needs to get feedback on the actual speed of the vehicle. Reed switch and magnets are mounted on the vehicles wheel assemblies and generate square wave pulse counting output that is used for the cruise control as well for the ABS. The on-board electronics averages out the wheel speeds and uses this signal to calculate the engine RPM and then adjust the throttle.
 

Application Classification

Applications are classified as Position Sensing, Pulse Counting, Electromagnetic or Relay, Temperature Sensing or Magnet Biasing types. This application is classified as follows and the link gives more information on best practices to help select the most suitable AT band and matching magnet.

Pulse Counting Type

Speedometer pulse counting Pulse counting type application When an application requires the volume of a fluid, or a distance, or the RPM of a machine tool Continue reading ->

Nov 7, 2020

The Reed Switches and Sensors used in such applications need to be robust, durable and efficient in meeting a high life expectancy. Our engineers work hard in life testing our products under various conditions, and our intention is to ensure end product durability and life. Although we wouldn’t want to restrict any of our products for use in only certain applications, the recommended products for use in this application are listed below.

R3 Miniature SMD Reed Sensor

Miniature Reed Sensor These miniature SMD reed sensors are designed for low power, high speed switching applications, and have a cost advantage over the Continue reading ->

Jun 7, 2021

R2 Standard size SMD Reed Sensor

Standard Size Reed Sensor R2-S Gull-wing SMD Formed Reed SensorR2-S Gull-wing SMD Formed Reed Sensor Pad LayoutR2-F Low Profile SMD Formed Reed SensorR2-F Low Continue reading ->

Dec 2, 2020

MS-225, M5 Threaded Cylindrical Sensor

M5 threaded cylindrical sensor MS-225 Threaded Magnet Sensor drawing starFeatures10W Contact Rating. Normally Open contact. Three sensitivity bands. Sputtered Continue reading ->

Nov 20, 2020