Product Specifications
Thermo Scientific EPD Mk2+ combines
unequalled radiological performance
with advanced software and hardware
Thermo Scientific EPD Mk2+
Electronic Personal Dosimeter
Key Features
• Advanced radiological performance, 15 keV
to 10 MeV, in a small, lightweight design
•Most complete dosimeter per IAEA Active
Personal Dosimeter Intercomparison study
• Multi-detector technology
• Excellent response to gamma, beta, and
• Improved power management and battery
• Loud configurable audible alarm
• Excellent immunity to electromagnetic
• Enhanced, easy-to-read display with optional
• Rugged battery cap and enhanced clip
• Improved reliability of LCD and case
• Additional software features provided
• Single AA battery powers the unit
The Thermo Scientific EPD Mk2+ builds upon
the high performance of the original MK2
design, while providing enhanced features.
The EPD Mk2+ is suitable for use as a single,
stand-alone dosimeter, or as a component of
a comprehensive dosimetry management
system using our renowned hardware and
software packages. The high quality of the
Mk2+ provides low lifetime costs as well as
advanced radiological performance.
The Thermo Scientific Mk2+ electronic
personal dosimeter is perfect for
organizations, utilities, agencies, and
research laboratories to monitor employee
dose and dose rates. The Mk2+ also boasts
a ruggedized battery cap and an improved
The unit is powered by a single standard AA
cell, either 1.5V alkaline or 3.6V Lithium
Thionyl Chloride for maximum battery life.
Pre-use integrity checks may be initiated over
the IR (Infra-Red) communications link as part
of the EPD Issue process of access control or
dosimetry management systems. These
checks include detector tests, battery test
and battery voltage read. Display and
function are controlled by a single button on
the front of the unit, recessed to prevent
inadvertent operation.
EPD Mk2+ Specifications
Sensitive to X and gamma radiation, ß particles
Direct readout of dose equivalents Hp (10) [deep/whole body] and Hp (0.07) [shallow/skin]
Display Units:
Sv and rem (with prefixes) OR scaled in Sv and cGy (with prefixes)
Neutron Response:
< 2%
Dose Display and Storage:
0 μSv to > 16 Sv (0 mrem to > 1600 rem)
Display Resolution:
1 μSv (0.1 mrem), up to 10 Sv
Storage Resolution:
1/64 μSv (=1.5 μrem)
Dose Rate Display:
0 μSv/h to >4 Sv/h (0 mrem/h to >400 rem/h); auto ranging
Energy Response:
Photon: Hp(10): [All ref. 137Cs]: ±50% 15 keV to 17 keV; ±20% 17 keV to 1.5 MeV; ±30% 1.5 MeV to 6 MeV;
±50% 6 MeV to 10 MeV
Photon: Hp(0.07): [All ref. 137Cs]: ±30% 20 keV to 6 MeV; ±50% 6 MeV to 10 MeV
Beta: Hp(0.07): ±30% 250 keV to 1.5 MeV (ref. 90Sr/90Y)
Angular Response:
Hp(10) 137Cs ±20% up to ±75º; Hp(10) 241Am ±50% up to ±75º; Hp(0.07) 90Sr/90Y ±30% up to 55º
Hp(10) 137Cs ±10%; Hp(0.07) 90Sr/90Y ±20%
Dose Rate Linearity:
Hp(10) 137Cs: ±10% <0.5 Sv/h (<50 rem/h); ±20% 0.5 to 1 Sv/h (50 to 100 rem/h); ±30% 1 to 2 Sv/h (100 to 200 rem/h);
±50% 2 to 4 Sv/h (200 to 400 rem/h); Between 4 and 50 Sv/h continues to accumulate dose at a rate > 1 Sv/h
Hp(0.07) 90Sr/90Y: ±20% <1 Sv/h (<100 rem/h); Between 1 Sv/h and 50 Sv/h continues to accumulate dose at a rate > 1Sv/h
Electrical and Mechanical
Single, recessed button controls display and function
Power Supply:
Single AA battery, 1.5V alkaline cell, OR 3.6V lithium thionyl chloride; battery voltage is displayable (subject
to display configuration settings); ON/OFF modes switchable over IR communications link or from button
(when enabled), for power-saving in intermittent usage application:
Typical Battery Life:
1.5V alkaline - 45-50 days continuous, extending to 70-80 days of typical use of OFF mode
3.6V lithium - 5 months continuous, extending to ~ 10 months of typical use of OFF mode
Audible and LED visual alarms for dose, dose rate, count down time, read time, and failure mode; fully
sealed; Time to Dose alarm display, based on current dose rate; audible alarm typically 98dB(A) at 20 cm
with multiple modes; Hp(10) dose chirp settable from 0.01 to 100 μSv/chirp (1 μrem to 10 mrem/chirp);
optional acoustic coupler/earpiece
Infrared (IR) interface up to 1 meter range (39”)
85 x 63 x 19 mm (3.3” x 2.5” x 0.8”), excluding clip
95 g (3.2 oz), including battery and clip
Case Material:
High-impact polycarbonate/ABS blend
10 year data retention without battery
Short term dose registers for Hp(10) and Hp(0.07)
Additional total-dose stores for multiple job periods
Peak dose rates with time of occurrence
All stored times have 1 second resolution
Selectable fast dose rate response setting
Dose clear events recorded
Count Down Timer:
1 hour, 39 minutes, 59 seconds maximum, resolution 1 second
Event Log:
23 entries for time recording of alarms, etc., for incident assessments
Dose Profile History:
Settable interval from 2 seconds to 35 hours, store transitions of Hp(10) and Hp(0.07) at a resolution of 1 μSv
(0.1 mrem); will store up to 579 records for transitions up to 127 μSv or less
Operating Temperature:
EMI/EMC (incl. static discharge):
-10ºC to +50ºC (+14ºF to +122ºF)
20% to 90% RH, non-condensing
IEC 1283: 2g, 15 minutes, 10 to 33 Hz
1.5 m (5’) drop on each surface onto concrete
Exceeds IEC 61526 requirements; exceeds more stringent MIL Standard 461D RS103
©2009 Thermo Fisher Scientific Inc. All rights reserved. All other trademarks are the property of Thermo Fisher Scientific Inc. and its subsidiaries. Results may vary under different operating conditions. Specifications, terms and pricing are subject to change. Not all products are available in all countries.
Please consult your local sales representatives for details. Literature Code RMP EPD Mk2+ 200905
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