Environmental Radiation Monitor (ERM) is a Geiger-Mueller (GM) detector based standalone, solar-powered, battery-driven unit which monitors the absorbed dose rate in air due to outdoor natural gamma radiation. It has GSM based online wireless data communication and is suited for installation in open field. It is equipped with three energy-compensated, halogen quenched, and neon-filled GM detectors: two large detectors for simultaneous low gamma dose rate measurements and one small detector for high dose rate measurement. Together, they provide a combined measurement range of 50 nGy.h^-1 -10 Gy.h^-1

1. Standalone, solar-powered and battery-operated field-deployable system for long-term monitoring of gamma absorbed dose rate in outdoor air as well as near real-time reporting of any elevation in this quantity due to any kind of radiological/nuclear emergencies.
2. Online wireless GSM based data communication from field-installed system to central receiving station.
3. Geiger-Mueller (GM) detector-based system.
4. Only a flat surface required for installation.
5. No requirement of AC mains supply.
6. No requirement of on-site data logging computer.
7. Once the battery is fully charged, works up to nearly 10 days in absence of sunlight.

1. Online environmental gamma dose rate monitoring at
   1. Public domain
   2. Defense locations
   3. R&D Units/Universities
   4. Nuclear power plants, etc.
   5. Network of field-installed systems with online communication would facilitate the long-term monitoring of gamma absorbed dose rate in outdoor air as well as near real-time reporting of any elevation in this quantity due to any kind of radiological/nuclear emergencies.

Environmental Radiation Monitor (ERM) is a Geiger-Mueller (GM) detector based standalone, solar-powered, battery-driven unit which monitors the absorbed dose rate in air due to outdoor natural gamma radiation. It has GSM based online wireless data communication and is suited for installation in open field. It is equipped with three energy-compensated, halogen quenched, and neon-filled GM detectors: two large detectors for simultaneous low gamma dose rate measurements and one small detector for high dose rate measurement. Together, they provide a combined measurement range of 50 nGy.h^-1 - 10 Gy.h^-1. The establishment of a network of such field-installed systems with online communication would facilitate the long-term monitoring of gamma absorbed dose rate in outdoor air as well as near real-time reporting of any elevation in this quantity due to any kind of radiological/nuclear emergencies.

1. Standalone, solar-powered and battery-operated field-deployable system for long-term monitoring of gamma absorbed dose rate in outdoor air as well as near real-time reporting of any elevation in this quantity due to any kind of radiological/nuclear emergencies.
2. Online wireless GSM based data communication from field-installed system to central receiving station.
3. Geiger-Mueller (GM) detector-based system.
4. Only a flat surface required for installation.
5. No requirement of AC mains supply.
6. No requirement of on-site data logging computer.
7. Once the battery is fully charged, works up to nearly 10 days in absence of sunlight.

1. Online environmental gamma dose rate monitoring at
   1. Public domain
   2. Defense locations
   3. R&D Units/Universities
   4. Nuclear power plants, etc.
2. Network of field-installed systems with online communication would facilitate the long-term monitoring of gamma absorbed dose rate in outdoor air as well as near real-time reporting of any elevation in this quantity due to any kind of radiological/nuclear emergencies.

SPECIFICATIONS OF THE SYSTEM

Sr. No.	Specification	Value
1	Size	Height: ~90 cm Base area: ~25 × 25 cm2 weight: ~25 kg
2	Detectors	Energy compensated GM tubes (2 redundant GM tubes for low dose rate measurement and 1 for high dose rate measurement)
3	Power supply	Solar Panel: 9 V/20 W Battery: 6 V/24 A-h lead-acid SMF battery Protection: Charge controller to protect from overcharging and deep discharge Back up: ~10 days
4	Communication	SMS (GSM)
5	Calibration	Performed at RSS, RSSD, BARC (National Standard Laboratory)
6	Range	Dose rate: 50 nGy.h-1 - 10 Gy.h-1 Energy: up to 1.3 MeV
7	Environmental endurance	Temperature: 0 – 60 ºC Relative humidity: up to 100 % Enclosure: IP68 compliant top chamber housing detectors and electronics, IP66 compliant bottom chamber housing battery (with support for solar panel)

SPACE

1. No requirement of large working space.
2. 250 sq. ft total area may be adequate.

MANPOWER

1. One Electronics or Instrumentation Engineer for production, assembly & testing of electronic components, development of firmware and software, etc.
2. One Technician (Electronics) for assisting in components mounting, testing, etc.
3. One Technician (Mechanical) for manufacturing of mechanical assembly.

Power Supply

1. For testing, a 24 V/5 A variable power supply can be used.

Test Equipment

1. Standard Test & measuring facility for electronic systems, mainly oscilloscope, digital multimeter, soldering station, etc.

Other Facilities

1. Microcontroller programming and testing