UNIDOS Universal Dosemeter

The PTW UNIDOS is a high performance secondary standard and reference class dosemeter / electrometer for universal use. UNIDOS is well known and accepted worldwide as the therapy dosemeter /electrometer of choice with the best performance available on the market. Thousands of international users enjoy the high quality, the reliability and the excellent adaptation of this unique dosemeter. UNIDOS is a high precision reference class therapy dosemeter according to IEC 60731, a secondary standard dosemeter according to IPEM guidelines, an in-vivo dosemeter for patient contact measurement according to IEC 60601-2-9, an X-ray diagnostic imaging dosemeter according to IEC 61674, and a health physics dosemeter. Of course, it fulfills the general requirements for safety of medical electrical equipment according to IEC 60601-1. UNIDOS as a reference class and secondary standard dosemeter is calibrated at the PTW calibration laboratory. PTW-Freiburg is an accredited secondary standard dosimetry laboratory of the German Calibration Service for radiological quantities and a member of the SSDL network organized by the International Atomic Energy Agency, IAEA. Consequently, calibration is based directly on the primary standards of the German Federal Institute of Physics and Metrology (PTB-Braunschweig) and the Bureau International de Poids et Mesure, Paris (BIPM). Ion chambers and solid-state detectors can be connected to the UNIDOS. A comprehensive chamber library makes it possible to store calibration data of up to 30 chambers. Air density corrections are done by keying in air pressure and temperature, or by means of radioactive check devices. The check device data are stored in a database. An internal clock calculates the decay of the isotope radioactivity. UNIDOS displays the measured values of dose and dose rate in Gy, Sv, R, Gy/min, Sv/h, R/min or Gy·m. The electrical values of charge and current are displayed in C or A. The device includes automatic leakage compensation, an automatic built-in system test and an RS232 interface. It features both mains and battery operation.

• Suitable for universal dosimetry in radiation therapy, diagnostic radiology and health physics
• Suitable for monitor calibration and patient dosimetry
• Complies with the following standards:
  • IEC 60731 as a reference class dosemeter
  • IPEM guidelines on dosimetry transfer instruments as a secondary standard dosemeter
  • IEC 60601-2-9 as a dosemeter for patient contact
  • IEC 61674 as a diagnostic dosemeter
• High accuracy, excellent resolution (1 fA) and wide dynamic measuring ranges
• Exceeds requirements of calibration labs for leakage, linearity, reproducibility and stability
• HV power supply (0 ? ± 400) V in increments of ± 50V
• Measures integrated dose (or charge) and dose rate (or current) simultaneously
• Includes an extensive detector library including detector data and calibration factors
• Database for radioactive check sources and a clock for decay calculation
• Checks high voltage between the ion chamber electrodes
• Internal electronic test circuits for automatic system checks
• RS232 interface for device control and data output
• Mains or battery operation