Guardian Ray Exp Geiger Counter with External Pancake

Geiger Counter with Dosimeter, Sensitive, Reliable and Precise.

E’ a modern multifunctional radioactivity meter as it also performs the function of a dosimeter and uses the very sensitive Pancake probe, housed externally to the instrument itself, in a practical external cover with handle. This special Geiger probe, in addition to being very sensitive and precise, can detect all types of ionized radiation, i.e. the α, b, c, and X-rays.

The so-called Pancake differs significantly from normal economy-class Geiger tubes by its thin and large active surface which is made of a mica membrane of 45 mm in diameter. Therefore it is also perfectly permeable to Alpha radiation, which due to their corpuscular nature cannot fit into common Geiger Muller tubes with borosilicate and metal casing.

Geiger counter made in Italy with professional performance which costs significantly less than similar competitive products.

E’ fruit of Italian ingenuity and creativity, its excellent characteristics have been certified several times in various measurement tests carried out at an important certified national calibration centre “ACCREDIA”. The results of these checks (paper in hand), attest without any uncertainty to its excellent performance, so we have no hesitations in calling it one of the best commercial Geiger counters. intended for both the professional and the most demanding enthusiast.

Main features:

It boasts the best price / performance ratio and is built, sold and serviced in Italy by the same national manufacturer.

Guardian Ray Plus Exp, has implemented in its CPU various software functions useful for the advanced processing of the data acquired on radioactivity. among these we mention the so-called long-term measurement mode called: “Scaler” which provides an acquisition time of 600 seconds, significantly increasing the sensitivity and acquisition precision of the instrument.

Regarding the hardware it has: an internal clock unit with calendar, a large membrane keyboard, the rechargeable lithium battery, a 2 x 16 character backlit alphanumeric LCD display, and a dual-function buzzer, which emits a “beep” for each detected particle and can also sound constantly if a certain presettable radiation threshold is exceeded.

There is also a native USB interface for downloading data to the PC and charging the lithium-ion battery, and finally a large integrated Datalogger, which thanks to its large 1 Megabit non-volatile memory, allows the memorization of radioactivity measurements even for several months.

Who can benefit from our professional Geiger Counter?

Our ionizing radiation meter is useful to the qualified radiation protection expert, in the protection of citizens' health by public administrations such as municipalities, the local health authorities and by the police to conduct health investigations directly in the area.

We think it could also be useful for research and analysis laboratories, companies that import and process products from countries that have been seriously involved in nuclear accidents in the past.

In general, we recommend purchasing it to those who need to have a reliable instrument for measuring radioactivity.

So who will find themselves using our tool, will easily be able to know the levels of ionizing radiation present in the environment, in the ground, in building materials, on some foodstuffs and in general on any product or personal object.

Specifications of the professional Geiger Guardian Ray Plus Exp:

Model:
– Guardian Ray 7317 PLUS Exp Geiger counter with probe housed in a practical external cover, Geiger Muller Pancake type for professional use

Display:
– Type alphanumeric backlit liquid crystal 2×16 characters where date and time are displayed, battery voltage and alarms

Unit of measure:
– µSievert /ora, MilliRoentgen/ora, Becquerel(CPS), Counts per minute (CPM

Probe used for the detection of radioactivity:
– Tubo geiger made in USA Pancake ultra sensibile, model: LND-7317, with rear cladding made of thick metal and large front window made of very thin mica. E’ filled with a mixture of noble gases + halogens. It is mounted externally to the instrument itself with the sensitive part a “vista”. therefore it can easily detect alpha+beta+gamma nuclear radiation and X-rays.

Technical data of the probe
– typical sensitivity (Co60): 3600CPM / (mR / h)
– typical sensitivity (CS137): 3450CPM / (mR / h)
– Operating temperature – 20° + 60° C
– Geiger tube supply voltage: 500V
– Circular mica window with 45mm diameter

Dose rate sensitivity (uSV):
– approximately 400 pulses/min for 1 µSv/h ref.CS-137

Types of rays detected
– 2.5 MeV alpha rays
– 150 keV Beta rays
– Gamma rays: da 10 keV

Efficiency With 4 pi. angle (in contact)

– Alpha radiation
– Am-241 5.5 MeV circa 18%

– Beta radiation
– C-14 49 keV avg. 156 keV max. 5.0%
– Bi-210 390 keV avg. 1.2 MeV max. 30-32%
– Sr-90 546 keV and 2.3 MeV 35-38%
– P-32 693 keV avg. 1.7 MeV max. 35

Unit of measure:
– µSv/h, MilliRoentgen/h , Becquerel (Counts per second), CPM (counts per minute)
– Measurement scale calibrated from 0.01 µSv/h a 999.00 µSv/h

Equivalent dose measurement:
– For its measurement, the exclusive detection of Beta and Gamma rays is assumed, therefore the ratio 1 is assumed:1, tra Gray / Sievert, that is to say: 1 gray = 1 sievert
– Dose measurement scale: and 0.01 µSv a circa 530.00 µSv

Radioactivity measurement method:
– standard with automatic sampling time autorange of 5/10/20/30 seconds
based on the intensity of the radiation detected
– Single and average of the values ​​acquired in subsequent measurements of the same session.
– Scaler, high precision measurement mode, with a fixed sampling time of 600 seconds, to be used to discriminate very low levels of radioactivity with high precision
– Maximums and minimums, this function, if selected, allows the storage and cyclic display of the highest and lowest values ​​detected in the context of the same measurement session

Calibration:
– Guardian Ray 305FO is subjected to various measurement tests under our supervision with calibrated radionuclides of the type CO60 – CS137 – SR90. Furthermore, on request it can be supplied with a calibration certificate issued by an authorized SIT center such as Enea of ​​Frascati or the Polytechnic of Milan.

Internal memory:
– Integrated datalogger with 1 Megabit memory (over 120.000 record), allows you to internally store several weeks of measurement, the data is saved in the internal memory in real records, complete with date and time of acquisition, furthermore, the data storage interval can be preset from 1 to 242 minutes

ONLINE real-time and deferred data download:
– via the USB interface, using the x Windows software(c) Easy Ray supplied with the instrument.

Beeper & alarm buzzer
– a is generated “beep” for each particle detected by the Geiger tube, or an intense and continuous tone if an alarm threshold that can be set directly in microSievert is exceeded.

Processor Used (CPU):
– PIC18F27J53 PDIP28 da 128K FLASH RAM USB 2.0 native (from the October 2013 version)

the CPU is equipped with a native USB 2 interface.0 High-Speed integrata, furthermore it is mounted on a pressure base to allow any reprogramming or replacement with a similar one but reprogrammed with the updated firmware.

Data transfer to PC and supplied software:
– With EasyRay software via standard USB port connected to a MsWindows® PC. the program is free, therefore freely downloadable from this site

Diet, Autonomy and Consumption:
– Powered by 3.8V lithium ion battery – 1500 / 1800mA/h
– Continuous operating autonomy with a full charge from the USB socket of approximately 24 hours (up to version 2012) and approximately 35 hours (from the latest version October 2013)
– consumption of approximately 35-50mA (under conditions of normal use)

Dimensions:
– Length 155 mm, Width 90 mm, max depth 30mm

Casing:
– Made of shock-proof ECOLOGICAL PLA via 3D printing

Product colours: (For availability, ask us for confirmation)
– Bianco – Orange – Verde – Giallo

Certifications:
– supplied with the EMC certificate of conformity to the CE regulations on electromagnetic interference

Recycling:
– The manufacturer can possibly collect the discarded product for disposal free of charge