Following a long and arduous search we have finally managed to get our sticky hands on a very small stock of these outstanding instruments. They are rarely seen outside of the US -- where they were made -- and over the years the Radalert 50 has earned an enviable reputation for reliability and performance making it one of the all-time great pocket Geiger Counters.
 
The headline feature is Alpha, Beta, Gamma & X-Ray sensitivity. Yes, that’s right, Alpha sensitivity! It is the hardest form of radioactivity to detect due to its very low penetrative power and this is all thanks to the remarkable LND 712 Geiger Müller detector tube. This has a thin mica end-window which allows Alpha particles to pass through. Very few instruments have this sort of range and capability; fewer still combine it with a pocket-sized case, large LCD auto ranging display, audible alarm/alert, audio and data output ports, audio and visual 'event' indicators and a long battery life. And we don't expected them to be available for very long at this price!
 
The Radalert 50 is exceptionally easy to use. There are just two controls on the front panel; one switch is for turning it on and enabling the internal sounder, the other is for switching between measurement units (CPM – counts per minute or mR/hr – milli Roentgens per hour). At switch-on the readout accumulates for the first minute and automatically refreshed thereafter at one-minute intervals. This gives a very simple and easy to understand indication of radiation levels, making it suitable for both personal monitoring and protection as well as long-term environmental logging. On the top panel, next to the opening for the Geiger tube’s end-window (protected by a metal grille), there are three more simple controls for enabling and setting the Radalert 50’s ‘Alert’ function, which sounds when the detected level exceeds a user-set threshold. An on-screen indicator shows it is in the Alert mode.  
 
Our Radalert 50s are pre-owned and recently been removed from service in the nuclear industry. They are in full working order and generally good cosmetic condition, though there may be a few scuff-marks and some minor scratches on the case. 
 
All of the important numbers you need are below but if you want to know more about this highly regarded instrument there’s plenty of detailed info on the web. Please note, it doesn’t come with a manual but we’ll provide buyers with a link to the full PDF version.

 General Specifications:

 
Sensor:                                   LND712 Halogen-quenched mica end-window Geiger
Müller detection tube
Mica window density:           1.5-2.0 mg/cm2
Sidewall:                                 0.3mm #446 stainless steel.
Display:                                   LCD with mode indicators
Display Indicators:                 4-digit numeric, measurement unit, alert mode, alert
mode set, first minute count, total mode, x1000 mode (autorange), low battery
Operating Range:                   0 to 50,000 cpm, 0.001 to 50 mR/hr
Energy Sensitivity:                1000 CPM/mR/hr referenced to Cs-137
Accuracy:                                ±10% typical, ±15% maximum
Events:                                    bleep/click
Alerts:                                      Audible bleeper 
Count light:                             Red LED
Audio Output:                         2.5mm jack socket
Data Output:                           3.5mm jack to CMOS-compatible devices
Anti-Saturation:                      'Jam' protection, display hold at full scale in high
radiation fields
Temperature Range:               -10°to +50°C 
Power:                                      9-volt PP3 type battery
Dimensions:                            150 x 80 x 30 mm
Weight:                                     250 grams (including battery)

New Buyers Please Click HERE

Very Important Stuff For Overseas Buyers:
The prices shown are for UK buyers and inclusive of Royal Mail's Special Delivery Service. Non-UK buyers: item will be sent via insured tracked/signed airmail. Prices will be added during the check-out process. Please also note that this item may be prohibited or restricted in some countries.

Write a review

Please login or register to review

Medcom Radalert 50 Alpha, Beta, Gamma, X-Ray Radiation Monitor

  • Product Code: Medcom Radalert 50 Alpha, Beta, Gamma, X-Ray radiation monitor
  • Availability: In Stock
  • £199.99