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