Dose rate meter GRAETZ GammaTwin incl. declaration of conformity

Dose rate meter with alarm function for personal radiation protection when handling ionising radiation and for the detection of the dose rate and of the local dose.

incl. declaration of conformity
1.050,00 €
excl. 19% VAT
Fields of application

NDT, Fire Brigades, Civil Defence, Authorities, Customs, Shipping Companies, Nuclear Medicine, Nuclear Technology, Industry,
Chemistry, Research


small, handy, PTB-approved and easy to operate dose rate meter for the measurement of gamma radiation and X-rays
measurand: ambient dose rate equivalent ?*(10) and ambient dose equivalent H*(10) (local dose)
detector: energy compensated GM tube
large, digital indication of measured values on LC-display (backlit)
selectable simultaneous or separate indication of dose and dose rate,
additionally quasi-analog indication of dose rate (logarithmic bar graph)
4 preset dose rate alarm thresholds and 4 preset dose alarm thresholds
(on demand adjustment of customised alarm thresholds)
switchable acoustic single-pulse indication
automatic and continuous storage of the dose into a
non-volatile memory
storage of the dose and of set parameters even during battery change
permanent self test
designed for rough use, housing made of aluminium,
protection class IP54 (splashproof)
menu-driven user navigation
supplied together with a robust nylon bag
PLEASE NOTE: Detecting the personal dose requires a measuring
instrument with the measurand Hp(10).

Technical Data

Dose rate indication range
0 nSv/h ≤ ?*(10) ≤ 70 mSv/h
Dose rate measuring range
0.5 µSv/h ≤ ?*(10) ≤ 70 mSv/h
Dose indication range
0 nSv ≤ H*(10) ≤ 1.0 Sv
Dose measuring range
0.5 µSv ≤ H*(10) ≤ 1.0 Sv
Energy range
45 keV up to 1.3 MeV

Dose rate alarm thresholds
7.5 µSv/h, 25 µSv/h,
40 µSv/h, 300 µSv/h
Dose alarm thresholds
200 µSv, 500 µSv,
1000 µSv, 2000 µSv

Temperature range -20°C up to +60°C
Power supply 2 batteries 1.5 V (type AAA)
Acoustic alarm 80 dB(A) measured in 30 cm distance
PTB-Approval No. 23.51/10.02

(26 × 66 × 103) mm
approx. 190 g (with batteries)
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