The devices will cost between Bt9,000 and Bt13,000 and can be installed at service centres, said Pathum Thani Technical College director Kwanchai Panichkarn yesterday.

He spoke during a workshop in which the knowledge behind Lampang Technical College’s sensor device that detects a person trapped in a lock vehicle and Nakhon Pathom Technical College’s carbon dioxide-leakage detection device was passed onto other technical colleges. The workshop will conclude today.

Atthaporn Paithirakul, Lampang Technical College’s Electronics Department head, said the school’s device scanned a vehicle once it was locked and if it movement were detected the device would emit a siren sound, the vehicle’s lights would flash and a distress text message would be sent to the vehicle’s owner along with the global positioning system data related to the last five cellphone calls the owner received.

Khomsan Moungthip, head of Nakhon Pathom College’s Electrical Power Department, said the carbon dioxide-detection device would activate when a person was trapped in a vehicle or the carbon dioxide level went beyond 1,000 parts per million. It would blare a siren twice before automatically opening the windows, he added.