• Monitor personal radiation exposure

The Radalert HAC001 is a general purpose geiger counter that measures alpha, beta, gamma, and X-radiation. Exciting new features of the Radalert 100™ (which is the 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.

  • 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


  • Halogen-quenched Geiger-Müller 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

  • Accuracy:±10% typical; ±15% max. (mR/hr and µSv/hr modes)
  • Alert:User-adjustable alert level to 50 mR/hr and 160,000 CPM
  • Audio:Beeper chirps for each count (can be muted)
  • Calibration:Cesium 137 (gamma)
  • Certifications:CE Certified, RoHS Compliant, Meets WEEE standards, and ISO 9001:2001 & ISO 14001
  • Count Light:Red LED flashes with each count
  • 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
  • Options:Computer cable and software (IBM PC compatible)
  • 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
  • Sensitivity:1000 cpm/mR/hr referenced to Cs-137
  • Size:150 x 80 x 30 mm (5.9″ x 3.2″ x 1.2″)
  • Weight:225 grams (8 oz) including battery




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