The detection technology firm said the three contracts are worth around £1.6mln in aggregate.
The UK contract, worth £1.1mln, is from a UK government-related company while the US contract, worth £389,000, is from the US government's Joint Program Executive Office for Chemical, Biological, Radiological and Nuclear Defense.
The European contract, worth €180,000 is from the European Commission's Directorate-General for Migration and Home Affairs.
"The D3S platform continues to gain traction in the US and the rest of the world,” said Arnab Basu, the chief executive officer of Kromek.
“We are working with a number of high value-customers in a number of countries for deployment and implementation of this technology. These new contracts are great examples of the commercial progress in this area as well as the varied security and military applications for our D3S family of products," he added.
In afternoon trading, Kromek shares were 4.1% higher at 25.25p.
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