Feature a large logarithmically scaled meter with an open scale at the lower end to show background levels of radiation while displaying high levels without switching

• Several configurations available
• Built-in speaker provides audible feedback of the radiation intensity
• An alarm can be set to tripat any level on the scale
• Battery or line powered
• Packaged in a durable, lightweight aluminum case

Type R:

• Monitoring High Level Dose Rates A monitor scaled over the range 0.5 to 5000μSv h-1 (0.05 to 500mR/h)
• G-M tube is compensated to give a useful response from 45 keV to 1.5MeV and above
• Not recommended for monitoring X-radiation from apparatus operating below 75kVp

Type G:

• Monitoring for Low Environmental Dose Rates Highly sensitive performance
• Scaled over the range 0.05 to 75μSv h-1 (0.005 to 7.5mR/h)
• Useful energy range: 55 keV to 1.5MeV and above
• Not suitable for monitoring X-radiation

Type D:

• Uses partially compensated G-M tube to obtain an extended low energy response
• Scaled over the range of 0.5 to 1000μSvh-1 (0.05 to 100 mR/h)
• Useful energy range: 30 keV to 1.5MeV but response is maintained down to at least 17 keV
• Suitable for measuring radiation from X-ray apparatus operating at or above 45kVp

Type X:

• Scaled 0.5 to 2000 counts per second Uses an end window G-M tube without energy compensation
• Sensitive to radiation down to 10keV Useful for locating X-ray leakage from a variety of systems including high voltage equipment
• Not intended for measurement but as a relative check device

Type 41:

• Sodium iodide crystal (19mm dia. × 25mm thick)
• Suitable for energies from 25 keV upwards
• A lead cylinder surrounds the crystal gives the probe directional properties as well as reducing background
• Diameter: 41mm
• Length: 220mm

Type 41S:

• Cylinder without lead shielding and with a larger sodium iodide crystal (25mm dia. × 38mm thick) for increased sensitivity
• Suitable for energies from 25 keV upwards The probe is essentially omni-directional for medium and high energy gamma radiation
• Diameter: 38mm
• Length: 217mm

Type 42A:

• Sodium iodide crystal 23mm dia. × 1mm thick with a 14mg cm² aluminum window
• Probe has a higher sensitivity than the Type 41 for gamma energies below 60 keV to a minimum of 10-15 keV
• An integral lead collimator makes it particularly useful for 125I thyroid monitoring and deep vein thrombosis location
• Diameter: 40mm
• Length: 187mm

Type 42B:

• This probe is the beryllium window version of the type 42 and detects very low gamma energies down to 5keV
• The response above 15 keV is almost identical to the 42A

Type 44A:

• The sodium iodide crystal (32 × 2.5mm thick) is mounted on the front surface of the probe to facilitate monitoring of large contaminated areas Suitable for a range of energies from approximately 15 keV to 250 keV Beta sensitive for energies above 500 keV
• Diameter: 50mm
• Length: 180mm
• Aluminum window weight: 14mg/cm²

Type 44B:

• This probe is the beryllium window version of the above and extends the sensitivity down to approximately 5keV, making it useful for 55Fe
• 3.7kBq (0.1μCi) of 55Fe at 10mm yields approximately 180 counts s^-1
• Window weight: 47mg/cm²

Includes:

Each unit comes with a comprehensive manual containing tables and curves of response to different radiations and other useful information

Recommended for:

The 900 Series of radiation counters are well established in teaching, research, hospital and industrial laboratories