The GRAETZ GammaTwin is a handheld dose-rate meter designed for the accurate measurement of gamma and X-ray radiation. It is particularly suitable for professional use in radiation protection, emergency response, industry and research.

Main features

• Dual display: Large backlit LCD screen with simultaneous display of dose and dose rate, as well as analog logarithmic bar graph for dose rate.

• Alarm function: Four preset alarm limits for both dose and dose rate, with the possibility of customization as needed.

• Acoustic warning: Includes acoustic warning when thresholds are exceeded.

• Rugged design: Built for harsh environments with an aluminum housing and IP54 rating for protection against dust and splash water.

• Long battery life: Powered by two long-lasting AAA batteries and automatic saving of settings when changing batteries.

• Self-test: Continuous self-monitoring to ensure reliable operation.

Technical specifications

• Dose-rate indication: 0 nSv/h – 70 mSv/h

• Dose indication: 0 nSv – 1 Sv

• Energy spectrum: 45 keV – 1.3 MeV

• Temperature range: –20 °C to +60 °C

• Power supply: 2 x 1.5 V AAA batteries

• Weight: Approx. 190 g (including batteries)

• Dimensions: 26 x 66 x 103 mm

• Acoustic alarm: 80 dB(A) at 30 cm distance

• Approval: PTB certified