Contact Us
Contact Us Stock Check

Gas Cap Detection Sensor


At present there are discussions about an electronic control of the closure and locking of the gas tank lid.

Especially in this dangerous explosive area, Reed Sensors are ideal because they are hermetically sealed and can be specified as intrinsically safe. The actual Reed Switch is mounted in the gas cap while the magnet is mounted in the lid of the gas tank.

If the gas cap is not locked or the gas lid is not closed the Reed Switch is open. The on-board computer monitors the state of the Reed Switch and if it detects an open, locks the ignition system and the vehicle can not be started.

Full Application Write Up
Gas Tank Lid Monitoring - Reed Sensor


  • The reed switch used in the Reed Sensor is hermetically sealed and is therefore not sensitive to any sparks across the contacts thus they are hermetically sealed from the outside environment
  • Ex approved and intrinsically safe available
  • The hermetically sealed reed switch is ideally suited for switching low signal level voltages and currents which do not draw an arc
  • Magnet and reed sensor are isolated and have no physical contact by typically having the magnet mounted to the lid and the reed sensor mounted on the gas cap
  • The magnet is not affected by its environment
  • Millions of reliable operations
  • Cylindrical hole and screw fastening mounting
  • Contacts dynamically tested
  • Large sensing distances possible


MK03 Reed Sensor

M03 magnet not included

MK14Dia40.157 MK14 Reed Sensor
MK18Dia50.197 MK18 Reed Sensor
MK20/1Dia2.720.107 MK20/1 Reed Sensor
MK04 Reed Sensor Dimensions

M04 magnet sold separate

MK05 Reed Sensor

M05 magnet sold


Browse Our Entire List Of Applications Or Search Our Application PDF Library For More Details.


We Will Use The Email Address You Provide To Send You Marketing And Promotional Materials Through MailChimp.

Tradeshows & Events

Sensor & Test 2019
Time: 25.-27.06.2019
Place: Messe Nürnberg, Germany
Booth No.: 164
For More Details, Click Here.

Sensors Expo & Conference 2019
Time: June 25-27, 2019
Place: San Jose, CA USA
Booth No.: 916
For More Details, Click Here.

Electric & Hybrid Vehicle Technology Expo 2019
Time: Sep 10-12, 2019
Place: Suburban Collection Showplace, Novi, Michigan USA
Booth No.: 2005
For More Details, Click Here.

electronica India 2019
Time: September 25-27, 2019
Place: India Expo Center, Greater Noida, Delhi NCR, India
Booth No.: E121
For More Details, Click Here.

Follow Us

Focused. Leadership

Download Table
Products compare