Geiger Muller counter/GM counter j304/GM J304

(G-M)J304BY Counting tube, size:90*10mm,Detecting object B Y

Spec of (G-M)J304βγ Counting tube:

Outer Dim.                                    10mm

Total length                                    90mm

Material of outer case                           Glass

1.Counting rate voltage                           285-340V

2.Recommendation work voltage                   380V

3.Smallest plateau                               80V 

4.Largest background counting rate                 80times/min.

5.Smallest plateau slope                          10%/80V

6.Biggest initial voltage                           280-330V

7. γSensibility                                   380(60Co)(cps/uR/s)

8. Detecting object                               β  γ

Conditions of usage:

1.Load resistance                               5-10 megohm

2.Largest input circuit distributed capcity 

of counting instrument                         10 mmf.(mircomicrofarad)

3.Input capacity range of counting instrument       5-10 mmf.

4.Mobility range of environment temperature       -40--+50 C

5.Background                                 25cpm

Geiger Tube ApplicationsGeiger Müller tubes provide an easily-used means of both detecting and measuring the following types of radiation:

alpha particlesbeta particlesX-raysgamma raysTypical applications of Geiger Müller tubes include the following, which occur in and around nuclear power stations:

checking satisfactory performance of shieldingensuring safety of working staffwarning of any release of contaminationrecording exposure levelsmonitoring environment near nuclear installationsdetecting hazards for emergency service staffThe environment near nuclear power sources is generally monitored by a number of peripheral instrument stations, each with two Geiger Müller tubes. lf release of activity occurs, it is immediately detected and a signal is fed to a computer-controlled monitoring system. The computers trigger alarm warnings and provide an indication of the location of probable 'downwind' areas where precautions should be taken. They also indicate the most probable 'upwind' location of the leakage source.

For detectors used at nuclear installations by the various emergency services, a suitable choice is ourJ304 Additional applications not specifically associated with nuclear power stations include:

external monitoring of fluid levels in processing tanks in the chemical and petroleum industriesexternal monitoring of levels in coal hoppers, smelting furnaces, and liquified gas containersthickness measurement by absorption in paint layers, thin metal sheets, and abrasive layers on 'sand papers'finding cracks or voids in metal or stonetracking the radioactive isotope 'labels' frequently used as tracers in chemistry, agriculture, civil engineering, petroleum engineering, and medicinedetecting tracers used for indicating a change of oil in a time-share oil pipe line, or for tracking underground movement of wateroil well loggingmeasuring output from nuclear sources in various types of educationalexperimentationIn educational establishments, the robust j305, for example, with its plug-in base and window guard, is ideal for beta and gamma radiation experiments. GM Detectors have an advantage of exhibiting a high degree of immunity when operating in a high Neutron Flux

Geiger Muller counter/GM counter j304/GM J304