Desk Report,
Revolution changed the light engineering industry of North Bengal
Engineer Md. Mahmudunnabi Biplob from Bogra created an oxygen concentrator during the Corona pandemic. He made an oxygen concentrator during the restrictions from Bogra by staying up at night. Using indigenous technology and equipment, Md. Mahmudunnabi created a portable oxygen concentrator with his own talent in a month. Through this oxygen concentrator, up to 300 liters of oxygen can be produced from the air in the room per hour. It is also quite easy to use. The device can provide pure oxygen in just 5 minutes through a regulator. This oxygen concentrator, weighing less than 30 kg, has created the opportunity to be used in any hospital. The cost was 70 thousand taka.
Revolution changed the light engineering industry of North Bengal

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Revolution changes North Bengal’s light engineering industry
Updated: 27 June 2025, 12:17
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Md. Mahmudunnabi
Bogra engineer Md. Mahmudunnabi revolution made oxygen concentrators during the Corona pandemic. He made oxygen concentrators from Bogra by staying up at night during the restrictions. Using indigenous technology and equipment, Md. Mahmudunnabi made a portable oxygen concentrator with his own talent in a month. Through this oxygen concentrator, up to 300 liters of oxygen can be produced from the air in the room per hour. It is also quite easy to use. The device can provide pure oxygen in just 5 minutes through a regulator. This oxygen concentrator weighing less than 30 kg has been made available for use in any hospital. The cost was 70 thousand taka.
In 1996, along with teaching at Bogra Polytechnic, Md. Mahmudunnabi established a refrigeration and air conditioning workshop. In his workshop, he invented a special flood warning device. Built at a cost of just five lakh taka, this device runs on batteries and solar panels. Mahmudunnabi’s flood warning device won the Best Inventor award at the Digital Innovation Fair in Bogra in 2018. Mahmudunnabi’s other innovations include a baby urine alarm bed, a saline alarm system for pushing on the patient’s body, a water aerator for supplying oxygen to water for aquatic animals, an automatic sanitizing machine to prevent corona, an automatic hand exerciser for use by paralyzed patients, a digital door lock, and lock ring tools for refrigeration and air conditioning systems. He is preparing a ventilator machine for use in intensive care wards (ICUs) for critically ill patients.
