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Dose Rate Alarm Units |
for the use in explosion endangered atmospheres:
Dose Rate Alarm Unit GRAETZ GammaTest C |
The GammaTest C is a light, robust battery operated pocket-sized dose rate alarm unit for the personal radiation protection for the detection of gamma and X-rays. Four different alarm thresholds can be adjusted. When being exceeded, an optical (red LED) and acoustic alarm will be triggered.
The dose rate alarm threshold 25 µSv/h is required by the German Fire Brigades Regulation (FwDV 500) for the determination of a danger zone. The alarm threshold 40 µSv/h is required in the range of non destructive testing (NDT) during radiographic processing (for example by X-rays): the local dose rate outside the control area may not exceed 40 µSv/h.
The splash-proof, anodically treated aluminium housing of the GammaTest C ensures a shielding against EMC influence.
Technical Data
| Detector: | energy compensated Geiger-Müller tube |
| Measuring size: | ambient dose equivalent rate H*(10) |
| Energy range: | 40 keV - 1,3 MeV |
| Alarm thresholds: | 25 µSv/h, 40 µSv/h, 1 mSv/h, 10 mSv/h |
| Overload capacity: | > 500 mSv/h |
| Temperature range: | -30 °C up to +60 °C (operation)
-40 °C up to +70 °C (storage) |
| Acoustic alarm: | > 80 dB(A) measured at 30 cm distance |
| Dimensions / Weight: | (106 x 67 x 23) mm, without clip / approx. 190 g (with batteries) |
| Power supply: | 2x AAA (LR03) |
| Operating life: | approx. 250 hours |
| PDF-File: | GammaTestC_en.pdf (104 KB) |
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Dose Rate Alarm Lamp GRAETZ GWL 10m |
The GWL 10m is an accumulator operated dose rate alarm unit, independent of mains supply, for the detection of gamma radiation and X-rays. The instrument has four alarm thresholds, triggering optical and acoustic alarm when being exceeded. The acoustic alarm can be switched off, if required.
The instrument, designed for operations in "heavy-duty" environments, is EMC-proof and equipped with a robust and splash-proof housing. The GWL 10m is preferably used for room monitoring and for the determination of restricted areas, where a given dose rate has been achieved.
The GWL 10m is supplied together with a recharger unit for recharging the built-in accumulator.
Optional accessories:
Technical Data
| Type of radiation: | gamma radiation / X-rays (DC installations) |
| Detector: | filtered GM-tube |
| Measuring size: | ambient dose equivalent rate H*(10) |
| Alarm thresholds: | 7,5 µSv/h, 25 µSv/h, 1 mSv/h, 10 mSv/h |
| Acoustic alarm: | > 93 dB(A) measured in 30 cm distance,
can be switched off |
| Energy range: | 40 keV - 1,3 MeV |
| Temperature range: | -30 °C up to +60 °C |
| Power supply: | accumulator
(operating time with fully charged accumulator approx. 48 hours, without acoustic alarm) |
| Housing: | aluminium combined with high impact plastic
protection class IP 65 |
| Dimensions / Weight: | (120 x 120 x 250) mm / approx. 2300 g |
| PDF-File: | GWL10m_en.pdf (129 KB) |
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Dose Rate Alarm Unit GRAETZ GammaSmart |
The GammaSmart is a pocket-sized, very robust, battery-operated dose rate alarm unit for the personal radiation protection. It is designed for the detection of gamma radiation and X-rays, indicating these with clear optical and significant acoustical pulse repetition rate. An increasing dose rate leads to an increasing pulse rate.
The splash-proof aluminium housing - equipped with an optical battery control - ensures a shielding aginst electromagnetic influence: the device is EMC-proof.
Technical Data
| Type of radiation: | gamma radiation / X-rays |
| Detector: | GM-tube |
| Sensitivity: | counting rate at 3 µSv/h approx. 1 count/min |
| Acoustic Alarm: | > 85 dB(A) measured in 30 cm distance |
| Temperature range: | -30 °C up to +60 °C |
| Power supply: | 3 batteries type LR1 1,5V |
| Housing: | aluminium |
| Dimensions / Weight: | (130 x 50 x 20) mm / approx. 150 g |
| PDF-File: | GammaSmart_en.pdf (98 KB) |
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Dose Rate Alarm Unit
|
for personal radiation protection in explosion endangered atmospheres
The dose rate alarm unit "GammaSmart V.Ex" is a very robust and easy to handle pocket-sized alarm unit. It is accumulator operated and designed for personal radiation protection.
It detects gamma radiation and X-rays, indicating these with clear optical and acoustical single pulses. An increasing dose rate leads to an increasing pulse rate.
The splash-proof aluminium housing (IP 54) ensures a shielding against electromagnetic influence. An optical battery control indicates the GammaSmart's readiness for use.
Recharge of the built-in accumulator requires the recharger unit "GRAETZ 462L" (necessary accessories).
Technical Data
| Type of radiation: | gamma radiation / X-rays | |
| Detector: | GM-tube | |
| Sensitivity: | at 3 µSv/h approx. 1 count/min | |
| Ambient background radiation: | approx. 1 count/2 min | |
| Acoustic alarm: | > 85 dB(A) measured in 30 cm distance | |
| Temperature range: | -20 °C up to +40 °C | |
| Power supply: | lithium-polymer accumulator | |
| Operating time with fully charged accumulator: | at ambient background radiation 2 months minimum | |
| Recharging time: | approx. 1 hour | |
| Housing: | aluminium | |
| Dimensions / Weight: | (95 x 50 x 20) mm / approx. 150 g | |
| ATEX Approval No.: | BVS 06 ATEX E 148 | |
| Marking: | 
II 2G EEx ib IIB T4 |
|
| PDF-File: | GammaSmart_VEx_en.pdf (127 KB) | |
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