<p> </p> <p>Pro quality NR-850 geiger counter / nuclear radiation detector (Blue model).<br><br>LCD display with automatic data storage.</p> <p>Three alarm methods: sound, light &amp; vibration.</p> <p>Higher spec Geiger tube, with improved accuracy &amp; stability.</p> <p>Features:</p> <p>With an easy to read LCD display, the working status of the instrument is clearly displayed &amp; you can quickly &amp; accurately read the data you need.<br><br>With the function of automatically storing data, even if the power is suddenly cut off, the data is secure &amp; can be stored for a long time.</p> <p>The NR-850 nuclear radiation detector is greatly improved over more basic models.</p> <p>Specifications:</p> Five measurement units: uSv/h, uGy/h, mR/h, cps, cpm. Detecting rays: X, Y, β (hard beta rays) Dose current rate: 0.01~1000usv/h (10msv/h) Cumulative dose equivalent: 0.01μSv~500.0mSv Energy response: 48KeV~1.5MeV≤±30% (for 137CS-) Sensitivity: 80CPM/uSv (for Co-60) Relative inherent error: NR-750≤±15%(137CS1mSv/h) – basic model, only reads uSv/h, uGy/h, mR/h NR-850≤±10%(137CS1mSv/h) – higher spec Geiger tube, accuracy and stability improved, professional model Alarm threshold: Dose rate: can be selected at 0.5, 1.0, 1.5, 2.0, 2.5, 5.0, 10.0, 50.0, 100.0μSv/h Cumulative dose: can be selected at 0.05, 0.5, 1.0, 2.0, 5.0, 10.0, 20.0, 50.0, 100.0mSv