High-Quality Radiation Detection Instruments
How to Select Your Instrument - Comparison Chart

Instruments powered by a 9V Alkaline battery. Each model includes an LED & an audible beeper (which can be muted) that register each radiation event.

Download the Comparison Chart as an Excel Document.


Instrument Name Sensor Detects & Measures Display Ports Operating Range Utility Menu Timed Count Auto Averaging Adjustable Alert Feature Weight
Radalert 100 LND 712 α, β, γ, X digital LCD 3.5 mm data output & 2.5 mm calibration input .001 to 110 mR/hr
.01 to 1100 μSv/hr
0 to 350,000 CPM
0 to 3,500 CPS
0 to 9,999,000 Total Counts
Yes 1 min to 40 hrs Yes - Can be turned On or Off adjustable to 50 mR/hr & 160,000 CPM 225 grams

The Geiger(Discontinued) Glass GM Tube β, γ, X no display 3.5 mm data output & 2.5 mm audio output 0 to 420,000 CPM No N/A N/A No 200 grams

Monitor 4(Discontinued) LND 712 α, β, γ, X analog meter N/A selectable (by switch):
x1: 0 to .5 mR/hr & 0 to 500 CPM
x10: 0 to 5 mR/hr & 0 to 5K CPM
x100: 0 to 50 mR/hr & 0 to 50K CPM
No N/A N/A No 178 grams (without battery)

Inspector Alert LND 7317 α, β, γ, X digital LCD 3.5 mm data output & 2.5 mm calibration input .001 to 100 mR/hr
0 to 350,000 CPM
.01 to 1,000 μSv/hr
0 to 5,000 CPS
0 to 9,999,000 Total Counts
Yes 1 min to 24 hrs Yes - Can be turned On or Off adjustable to 50 mR/hr & 160,000 CPM 323 grams

Inspector EXP LND 7317 housed in an anodized aluminum external probe α, β, γ, X digital LCD 3.5 mm data output, 2.5 mm calibration input, & probe port .001 to 100 mR/hr
0 to 350,000 CPM
.01 to 1,000 μSv/hr
0 to 5,000 CPS
0 to 9,999,000 Total Counts
Yes 1 min to 24 hrs Yes - Can be turned On or Off adjustable to 50 mR/hr & 160,000 CPM 350 grams