21. A total of 18, 875 film badge dosimeters were issued to personnel during the operation. 22. A U . S . radiation dosimeter experiment was also carried out without using biological materials. 23. A wide range of ionization chamber, film badge, and thermoluminescent personal dosimeters are available. 24. The dosimeter must be periodically recharged. 25. The workers wore hazmat suits and hazmat masks, carrying dosimeters that alerted at 80 millisieverts. 26. The radiation experiment consisted of a radiation dosimeter provided by the Spanish company iC-M�laga. 27. Personal quartz fiber dosimeters were procured, as were film badge dosimeters, which recorded cumulative dosage. 28. Personal quartz fiber dosimeters were procured, as were film badge dosimeters , which recorded cumulative dosage. 29. Their dosimeter beeps if the limit is reached and the worker's site access is cancelled. 30. In April 2012 the government of the evacuated city of Namie bought a whole-body dosimeter .