From a technical point of view, there is almost no difference between these two models. The higher price of RadiaScan-801 is due to the manufacturer's financial costs for metrological verification. This device comes with an official certificate of state lab verification.
As a rule, various institutions using the dosimeter for legally significant examinations require such a document.
In addition, RadiaScan-801 displays the results of radiation measurements only in sieverts (μSv, mSv/h, etc.); readings in Roentgen are not provided in this model since Roentgen (mcR, mcR/h, etc.) is an off-system unit of measurement, and the technique of RadiaScan-801 metrological verification assumes measurements only in system units (sievert) adopted in the international system of units.
The number one reason is the professional detector type Beta1-1.
And also, RadiaScan developers manage to reduce the measurement error caused by external factors.
The RadiaScan dosimeter uses all available means of increasing the accuracy of measurement results:
- circuitry (precise high-voltage source with feedback);
- firmware (dynamic source adjustment);
- design solutions (for example, moisture factor limitation).
In different RadiaScan-701A operating modes, you should use the back cover according to the same principle: if you close the Beta-1-1 sensor with the metal side of the cover (“Gamma” icon on the cover), the device will only detect gamma radiation in all modes. When closed, this metal insert in the cover prevents α- and β-particles from reaching the sensor.
If you remove the cover, the Beta-1-1 sensor can detect two more types of radiation: alpha and beta.
Thus, if you only need to measure the gamma background radiation, close the sensor with a metal insert cover ("Gamma" icon).
The more modern RadiaScan-701A model has a built-in charger, i.e. the device can be charged without removing the batteries, just as you charge your smartphone. The RadiaScan-701 model is not capable of charging batteries and is withdrawn from production.
There are no specific factors limiting the device's service life.
Therefore, like any other electronics it will be capable of working for decades.
The sensor's resource is more than 100 years under load.
Just follow the rules of careful device handling.
It is important to understand that the dosimeter accuracy does not change over time.
With factory settings, the RadiaScan dosimeter works continuously with fully charged regular batteries at a normal radiation background for 59 hours in active mode.
With the same factory settings, but when the control source has a dose rate of 300 mcR/h, it provides 44 hours of continuous operation. For occasional use, it will be more than several months.
Then, you just charge the device for 3 hours until fully charged, like your smartphone, via USB cable.
This is a frequent question from users. At first it seems to be a device fault. However, this is done purposefully.
The RadiaScan technical base was initially developed for laboratory accuracy and for the official registration of readings, i.e. to be a professional dosimeter with very high accuracy of measurement results. High-voltage source of the Beta-1-1 meter is constantly monitored by the microprocessor for maximum accuracy and voltage stabilization. In fact, the microprocessor is in the feedback loop of the voltage adjustment circuit.
The advantage of such a circuit is high accuracy and stability of voltage 400 V regardless of the battery condition, ambient temperature and humidity. This is essential to ensure that the dosimeter readings are not dependent on weather, charge and battery type.
The delivery set includes 2 AAA NiMH 1,100 mAh rechargeable batteries.
Charge the batteries for the first time for 3-4 hours, then it is advisable to discharge them completely. Repeat 3-4 full charge-discharge cycles. This will provide maximum battery capacity.
The manufacturer does not recommend using LiOH batteries. This can affect the results of measurements in some cases.
Yes. To properly display the residual charge of conventional batteries, in the device settings, switch to the right power supply type (Settings - Other - Power Sources - Batteries - "NO").
In the Basic mode of the RadiaScan dosimeter, you can accurately measure the radiation power from a particular object, or the power of the surrounding background radiation.
Search mode is to search for objects with elevated background radiation. In Search mode, readings will be unstable and may rise or fall sharply depending on the distance to the object.
It is assumed that first, you find a radioactive object, and then accurately measure its radiation level in the Basic mode.
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