Radiation Meters

GeigerGraph Software

The GeigerGraph software works with the Radalert 100, Inspector Alert, and Inspector EXP. It receives each pulse or count from the instrument through the data cable, and displays and graphs the Current reading, an Average, and Minimum and Maximum counts per minute (CPM) over the test period.

You can order the GeigerGraph software as an option when you buy the Radalert 100 or Inspector Alert.

The GeigerGraph software is useful for continuous monitoring of environmental radiation. It alerts you to any elevated levels relative to your typical background count. The software gives an audible and visual alert whenever the CPM exceed a user-determined level. For example, in the picture above, the radiation level increases to above the user-set Alert Level of 100 CPM halfway through the test period, and the software issues a visual alert.

Features:

Runs on any PC with Windows 95 or higher. Minimum system requirements: Pentium Processor 200MHz, CD-ROM drive, available serial port, 16MB RAM (more recommended), 1MB hard drive space, and high color (16 bit) display.
Can run in the background, and notify you only if the radiation level exceeds your pre-set Alert Level.
Saves the radiation count data every minute to a text file that can be exported to a spreadsheet program such as Excel or Lotus for further analysis.
Includes a simulation that mimics the recording and graphing of radiation counts without a Geiger counter. The simulation demonstrates the program, graphing normal background radiation followed by an elevated radiation count from a simulated radioactive "event" that exceeds the alert level.
Includes a data cable with a 3.5 mm stereo plug that plugs into the geiger counter's dual miniature jack. The output at the tip of the plug provides a positive 5 volt pulse each time the Geiger counter detects a count. The other end of the data cable is a 9 pin RS-232 connector for an IBM PC compatible serial port.
Comes on a CD-ROM which the user installs on the computer's hard drive, so the CD can be removed after installation for running of the program.

RadAlert 100 Geiger Counter

The Radalert 100 is a general purpose geiger counter that measures alpha, beta, gamma, and x-radiation. Exciting new features of the Radalert 100 — as an upgraded version of the popular Radalert 50 — include a three-second update and a utility menu that allows you to change the default settings for several operating parameters. Its digital liquid crystal display (LCD) shows the current radiation level in your choice of milliroentgens per hour from .001 to 110 or counts per minute (cpm) from 0 to 350,000. When SI units are selected, the LCD shows readings in microsieverts per hour from .01 to 1100 or counts per second (cps) from 0 to 3,500. This instrument also offers an accumulated total and timer function, up to 9,999,000 counts and 40 hours. A red LED blinks and a beeper chirps with each count (the chirp can be muted). An audible alert sounds when the radiation reaches a user-adjustable level. The Radalert 100 meets CE certification requirements for Europe.

Use the Radalert 100™ to:

Monitor personal radiation exposure
Monitor an area or perimeter
Detect radiation leaks and contamination
Ensure regulatory compliance
Monitor changes in background radiation
Demonstrate principles of nuclear physics
Check for radioactive minerals in the earth

Specifications:

Sensor:
- Halogen-quenched Geiger-Meuller detector (LND712)
- Mica end window density is 1.5-2.0 mg/cm²
- Side wall is 0.012" #446 stainless steel
- Detects Alpha, Beta, Gamma, and X-radiation

Display: 4-digit liquid crystal display with mode indicators

Operating range:
mR/hr: .001-110
CPM: 0-350,000
µSv/hr: .01-1,100
CPS: 0-3,500
Total: 0-9,999,000 counts
Timer: up to 40 hours

Calibration: Cesium 137 (gamma)

Sensitivity: 1000 cpm/mR/hr referenced to Cs-137

Accuracy: ±10% typical; ±15% max. (mR/hr & mSv/hr modes)

Alert: User-adjustable alert level to 50 mR/hr & 160,000 CPM

Count light: Red LED flashes with each count

Audio: Beeper chirps for each count (can be muted)

Ports:
- Output: Stereo 3.5 mm jack sends counts to computers, data loggers, other CMOS-compatible devices, and headphones
- Input: Mono 2.5 mm jack provides electronic calibration input

Power: One 9-volt alkaline battery; average battery life is 2160 hours at normal background, 625 hours at 1 mR/hr with beeper off

Size: 150 x 80 x 30 mm (5.9" x 3.2" x 1.2")

Weight: 225 grams (8 oz) including battery

Options: Computer cable and software (IBM PC compatible)

CE Certified

Specifications subject to change without notice.

Inspector Alert Radiation Meter

Handheld Surface Contamination Meter

The Inspector Alert measures alpha, beta, gamma and x-radiation using a 2-inch "pancake" GM detector with high sensitivity to common beta and alpha sources.

The easy-to-read digital display shows readings in your choice of mR/hr, CPM, CPS, or µS/hr. The Total/Timer feature allows timed readings from one minute to 24 hours for precise measurement of low level contamination. An audible alert sounds when the radiation reaches a user-adjustable level.

Quickly alerts first responders to the presence of harmful levels of nuclear radiation
Improves safety in the laboratory and in the field
Automatically compensates for GM tube dead time
Will not jam in high radiation fields
Meets CE certification requirements for Europe

Specifications:

Detector: Halogen-quenched Geiger-Mueller tube. Effective diameter 1.75" (45 mm). Mica window density 1.5-2.0 mg/cm².

Display: 4-digit liquid crystal display with mode indicators

Operating Range:
mR/hr: .001 to 100.0
CPM: 0 to 350,000
Total: 1 to 9,999,000 counts
µSv/hr: .01 to 1,000
CPS: 0 to 5,000

Gamma Sensitivity:
3500 CPM/mR/hr referenced to Cs-137
Smallest detectable level for I-125 is .02 µCi at contact

Efficiency:
For 4 pi geometry at contact
Beta
C-14 (49 keV avg. 156 keV max.): 5.3%
Bi-210 (390 keV avg. 1.2 MeV max.): 32%
Sr-90 (546 keV and 2.3 MeV): 38%
P-32 (693 keV avg. 1.7 MeV max.): 33%
Alpha
Am-241 (5.5 MeV): 18%

Averaging Periods: Display updates every 3 seconds, showing the average for the past 30-second time period at normal levels. The averaging period decreases as the radiation level increases. User can select fast 3-second averaging period

Timer: Can set 1-10 minute sampling periods in one-minute increments, 10-50 minute sampling periods in 10-minute increments, and 1-24 hour sampling periods in 1-hour increments

Alert: Beeper sounds the alert. User-adjustable alert level is set using three buttons

Accuracy: ± 15% up to 50 mR/hr; ± 20% up to 100 mR/hr

Anti-Saturation: Readout holds at full scale in fields up to 100 times the maximum reading

Temperature Range: -20º to +50º C , -4º to +122º F

Power: One 9-volt alkaline battery; battery life is average 2160 hours at normal background, average 625 hours at 1 mR/hr with beeper off

Size: 150 x 80 x 30 mm (5.9" x 3.2" x 1.2")

Weight: 323 grams (11.4 oz) including battery

I/O Ports: Dual miniature jack for CMOS or TTL devices, sending counts to computer or data logger. Submini jack for electronic calibration.

Count Light: Red LED flashes with each radiation event

Audio: Beeper beeps with each radiation event; can be muted

Options: Wipe test plate

Specifications subject to change without notice.

The Inspector EXP

External Probe Surface Contamination Monitor

The Inspector EXP is designed to meet the requirements of emergency response personnel. It has the same valuable features, small size, and quality of the Inspector, but instead of the built-in detector, it has the added versatility of an external probe.

The carrying case has a clear window panel that provides a full view of the readout and count light and access to the switches. It includes convenient hand straps and a belt loop for carrying the instrument and a small pocket for a check source.

The probe can be attached to the carrying case for one-handed operation if desired. The protective probe cover folds easily out of the way during one-handed operation.

Specifications:

Same as Inspector (below) except for external probe:

RAP-RS1 Probe:

Detector: Same as Inspector Alert (below)

Enclosure: Anodized aluminum housing with coated, black foam grip

Power supply: 500-volt, in the probe head

Size: Approx. length: 22.2 cm (8.75 in.) Diameter: 7 cm (2.75 in.)

Connector: Amphenol tuchel connectors

Inspector specifications:

Detector:
- Halogen-quenched Geiger-Mueller tube.
- Effective diameter 1.75" (45 mm).
- Mica window density 1.5-2.0 mg/cm².

Display: 4-digit liquid crystal display with mode indicators

Operating Range:
mR/hr: .001 to 100.0
CPM: 0 to 300,000
mSv/hr: .01 to 1,000
CPS: 0 to 5,000
Total: 1 to 9,999,000 counts

Gamma Sensitivity:
3500 CPM/mR/hr referenced to Cs-137
Smallest detectable level for I-125 is .02 mCi at contact

Efficiency: For 4 pi geometry at contact

Beta:
C-14 (49 keV avg. 156 keV max.): 5.3%
Bi-210 (390 keV avg. 1.2 MeV max.): 32%
Sr-90 (546 keV and 2.3 MeV): 38%
P-32 (693 keV avg. 1.7 MeV max.): 33%

Alpha:
Am-241 (5.5 MeV): 18%

Averaging Periods: Display updates every 3 seconds, showing the average for the past 30-second time period at normal levels. Averaging period decreases as radiation level increases. User can select fast 3-second averaging period.

Timer: Can set 1-10 minute sampling periods in one-minute increments, 10-50 minute sampling periods in 10-minute increments, and 1-24 hour sampling periods in 1-hour increments

Alert: Beeper sounds the alert. User-adjustable alert level is set using three buttons

Accuracy: ± 15% up to 50 mR/hr; ± 20% up to 100 mR/hr

Anti-Saturation: Readout holds at full scale in fields up to 100 times the maximum reading

Temperature Range: -20º to +50º C, -4º to 122º F

Power: One 9-volt alkaline battery; battery life is average 2160 hours at normal background, average 625 hours at 1 mR/hr with beeper off

Size: 150 x 80 x 30 mm (5.9" x 3.2" x 1.2")

Weight: 350 grams (11.4 oz) including battery

I/O Ports: Stereo 3.5 mm jack for CMOS or TTL devices – sends counts to computer or data logger. Mono 2.5 mm jack provides electronic calibration input.

Count Light: Red LED flashes with each radiation event

Audio: Beeper beeps with each radiation event; can be muted

Options: Wipe test plate

Specifications subject to change without notice.