Horiba Environmental Radiation Monitor

Environmental Radiation Monitor

PA-1000 Radi

Use it to measure environmental radiation in places like the following:
(sample measurements*)

For
measuring the
environmental
radiation
in the world
around us

Made of environmentally friendly plant-based plastic.This material reduces petroleum consumption as compared to conventional petroleum-derived plastics.

Every day, wherever we go, we are exposed to minute amounts of environmental radiation.* This environmental radiation is emitted continuously, day and night, from various objects and substances in the natural world and our living environment. Most environmental radiation consists of three types alpha radiation, beta radiation,and gamma radiation. Horiba's handy PA-1000 "Radi" environmental radiation monitor makes it easy for even non-specialists to accurately measure even minute levels of gamma radiation.

* Environmental radiation, also known as natural radiation, includes radiation emitted from space, soil, stones, the ground and the air, as well as from manmade objects such as concrete and buildings

Location	Approximate measurement
Inside a tunnel	0.080 µSv/h
Downtown (Osaka)	0.052 µSv/h
Downtown (Tokyo)	0.038 µSv/h
Near a river or the ocean	0.030 µSv/h
On top of Kyoto Tower	0.024 µSv/h

* Quantity of environmental radiation differs depending on measurement location

The Horiba Radi can measure radiation levels ranging from normal natural radiation to levels 100 to 200 times that intensity. Even non-specialists will find it easy to accurately measure radiation of 0.001 - 9.999 µSv/h.

Detection method	Scintillation
Type of radiation measured	Gamma radiation
Sensitivity	Min. 1000 counts per minute (1000 cpm) for 1 µSv/h
Relative error of indication	±10%
Indicator value variation	Max. 0.1 coefficient of variation
Energy range	Min. 150 keV
Energy properties	0.5 - 3* (150 keV - 1250 keV)
Effective measurement range and display	0.001 - 9.999 µSv/h 4-digit digital display (count value converted into µSv/h)
Sampling time	60 seconds
Display interval	60-second integrated value (moving average) displayed every 10 seconds
External dimensions	68 (W) × 28 (D) × 121 (H) mm
Weight	Max. 175 g (without batteries)
Accessories	Instruction manual, two AA dry cell batteries, neck strap

Specifications

* Relative sensitivity with 1 as the sensitivity to cesium 137 (¹³⁷Cs) (662 keV).

Note: This unit is designed only to measure the quantity of radiation at the measurement location. It does not determine the safety or danger posed by that quantity of radiation.

Radiation measurement is displayed in large easy-to-read figures.
Unit: microsieverts per hour (µSv/h)

To measure, simply press the POWER button
Equipped with an automatic power off function (turns off automatically after three hours).

Pressing the buzzer switch makes the unit beep when radiation is detected.

Types of radiation

Alpha radiation: Alpha radiation consists of extremely heavy particles with a nucleus of helium. They have a positive charge. In the natural world, alpha rays are given off by radium 226. In air , the particles cannot travel more than a few centimeters.
Beta radiation: Beta radiation consists of light particles with electrons that travel at high speed. In air, the particles can travel several dozen centimeters in a zigzag pattern.
Gamma radiation: Gamma radiation consists of electromagnetic waves that possess a high degree of energy. They have considerable penetrating power and can pass through the human body. Gamma radiation is related to the X-rays that are used in X-ray machines.

Radiation units

Becquerel (Bq): This unit expresses the intensity of the radiation emitted from radioactive substances. One becquerel is the activity of a quantity of radioactive material in which one nucleus decays per second.Gray (Gy) and Sievert (Sv): These units express the effect of radiation. The gray expresses the amount of radioactive energy received, while the sievert expresses the effect on a human being. Normally the gray and the sievert are used to express quantities per hour; the units are Gy/h and Sv/h, respectively.

The International Commission on Radiological Protection (ICRP) has recommended exposure to the general public of no more than 1 mSv per year to manmade radiation (not including natural radiation). This does not include exposure from medical checkups (such as X-rays).(1 mSv = 1000 µSv)

• Splash-resistant construction (JIS water resistance protection grade IPX4) The Horiba Radi can used with confidence even if ther are water droplets on the surface

• Handy unit is both compact and lightweight (weight 175 g or less)

• Uses two AA batteries. Battery life 50 hours or more (when manganese dry cell batteries are used)