SE International Digital Radiation Alert Monitor

Possible Household Sources of Radiation

Smoke Detectors: Some smoke detectors contain a sealed radioactive isotope as part of the smoke sensing mechanism. There is no danger to the individual if the container in sealed. They are labeled.

Camping Lantern Mantles: In recent years this has changed but some lantern mantles are made with radioactive Thorium. Be especially careful not to inhale or ingest the fine ash that is left when they are burned out.

Clocks, Watches, and Timers: Many old timepieces have dials painted with radium to make them glow in the dark. Tritium is now commonly used to obtain the same effect. Tritium is also radioactive but emits low energy radiation which cannot penetrate the lens of the timepiece.

Jewelry: Some gold used to encapsulate radium and radon for medical purposes was improperly reprocessed and entered the market as radioactive rings and other types of gold jewelry. Some imported cloisonné being glazed with uranium oxide exceeds U.S. limits. Some gems are irradiated by an electron beam or in an accelerator to enhance their color. Irradiated gems typically are held until there is no residual activity remaining.

Rock Collections: Many natural formations contain radioactive materials. Hobbyists who collect such things should vent the rooms in which these items are stored and be careful to avoid inhaling the fine dust particles from these samples.

Pottery: Some types of pottery are glazed with uranium oxide, such as Fiesta ware. To the best of our knowledge, this process has been discontinued, although some of these pieces are still in circulation.
• This is an FAQ on SE International's web site it contains good background information about radiation measurement
Power Point from SE International on the SE Inspector EXP+ (ppsx)

Now with a selectable alert, the Inspector EXP+ was designed for 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 providing full view of the readout, count light, and access to the switches. Convenient hand straps and a belt loop are provided for carrying the instrument. A small pocket is provided for a check source. The unique design of attaching the probe to the carrying case allows one-handed operation if desired. The protective probe cover folds easily out of the way during one-handed operation.


RAP-RS1 Probe - External Halogen-quenched, uncompensated GM tube with thin mica window, 1.4-2.0 mg/cm2 areal density. Effective diameter of window is 45 mm (1.75 in.). Radiation symbol on front label marks the center of the detector. Anodized aluminum housing with coated, black foam grip. 500-volt power supply is in the probe head. Size- Approx. length: 22.2 cm (8.75") Diameter: 7 cm (2.75") Connector - Amphenol tuchel connectors

4 digit liquid crystal display with indicators.

Averaging Periods Display will update every 3 seconds. At low background levels, the update is the moving average for the past 30-second time period. The timed period for the moving average decreases as the radiation level increases

Alert Set Range mR/hr .001 - 50 and CPM 1 - 160,000.
70 db @ 1m.

Count Light Red LED flashes with each radiation event.

Audio Indicator Internally mounted beeper (can be switched off for silent operation)

Outputs Dual miniature jack drives CMOS or TTL devices: count to computer or datalogger. Submini jack input allows for electronic calibration

Anti-Saturation Meter will hold at full scale in fields as high as 100 times the maximum reading.

Power Requirements One 9-volt alkaline battery. Battery life is 2,160 hours at normal background.

Temperature Range -10ºC to 50ºC (14ºF to 122ºF)

Weight Inspector: 880.2 grams (28.0 oz.) without battery.

Size 150 x 80 x 30 mm (5.9 x 3.3 x 1.2").

Includes Carrying Case, CE Certification for European Sales

Warranty 90 day Warranty on GM Detector, 1 year limited

Power Requirements One 9-volt alkaline battery. Battery life is 2160 hours at normal background.

Temperature Range -10ºC to 50ºC (14ºF to 122ºF)

Gamma Sensitivity 3500 CPM/mR/hr referenced to Cs-137. Smallest detectable level for I-125 is 0.02 µCi at contact. Timer can set 1 minute sampling periods from 1 to 10 minutes.

Operating Range mR/hr - 0.001 (1 µR) to 100 mR/hr CPM - 0 to 350,000 µSv/hr - 0.01 to 1000 CPS - 0 to 5000 Total/ Timer - 1 to 9,999,000 counts

Accuracy mR/hr ±10% typical (NIST), ±15% max - 0 to 100 µSv/hr ±10% typical (NIST), ±15% max - 01 - 1000 CPM ±10% typical (NIST), ±15% max - 0 to 350,000 (Referenced to Cs-137)

Weight Inspector: 547.1 grams (19.3 oz.) without battery.

Size 150 x 80 x 30 mm (5.9 x 3.3 x 1.2").

Includes Carrying Case, Cable for Inspector+ EXP: Beldon 9853 with Amphenol 31226 twinax. CE Certification.

Warranty 1 year limited, 90 day Warranty on GM Detector