The vehicles were received by Public Health Minister Anutin Charnvirakul, Public Health Permanent Secretary Dr Kiattiphum Wongrajit and ministry executives.
They were equipped with necessary testing equipment and state of the art information technology system for fast and accurate testing.
The Palace said that they were bought with the money that groups of people had presented to Queen Suthida to celebrate her birthday on June 3.
So far, Their Majesties have donated 36 biosafety vehicles to facilitate testing for Covid-19 in remote areas to reduce crowding at local hospitals. They also donated five vehicles for express analysis mobile units and two vehicles for digital x-ray units.
The King and Queen also granted an audience to the ambassador of the European Union to Thailand Pirkka Tapiola and his wife Olga Shumylo-Tapiola, and Ambassador of Israel to Thailand Meir Shlomo and his wife Bracha Shlomo, to bid farewell on leaving their positions.