Radon monitors are reliable, simple to use and can be sent by post.

The results are confidential and will not be given to anyone else without the prior consent of the client.


// Advantages of Radon Gas Monitors

• Rugged design for underground conditions

• Light weight, compact and small

• Local supplier

• Non-sensitive to gamma radiation fields

• Provides long-term monitoring of average radon concentrations, smoothing out the short-term fluctuations

• High sensitivity; lower level of detection: 1 month exposure – 22 Bq/m3  |  2 month exposure – 11 Bq/m3

Since the cost structure of the PARC RGM service is based on the number of monitors required, the price is relatively inexpensive with orders from 500 monitors and more.

Do’s and Don’ts of monitor employment, storage and transportation

Correct deployment principles

Deploy the monitors as soon as possible after receipt from the laboratory. Optimally the monitors should be placed in their correct position within 5 days from the date shipped from the laboratory. Record should then be kept by the client in this regard.

Location labels should be on the flat side of the monitors.

For are mentoring, monitors should be placed at typical breathing height. The optimum would be around 1.5 metres from the ground surface.

The monitors can be deployed any way up. They can for instance be placed on notice boards or shelf. It will be sufficient to hang the monitors in a loop e.g. tie them to racks or in the case of mining staff to their lamp cables or lamps.

Keep accurate records on a record sheet of where the monitor is deployed and the time of deployment. This is critical for the determination of the expected Radon dose.

Incorrect deployment principles

Do not put the monitors on the ground or floors of buildings.

Under no condition should the monitor be opened during deployment or shipment to and from the laboratory.

The number and barcode on the flat side of the monitor should not be removed.

Monitors should not be placed ceiling voids, pipes or ducts.

Monitors should also not be placed in drawers or cupboards.

Monitors should not be placed on televisions or VDU’s (Visual Display Units) Monitors should not be placed on hot pipes or heat sources such as radiators or other high heat sources. Placement on window sills is also not recommended.

Monitors should not be deployed in direct sunlight as the surface and inside void temperatures rise well above ambient temperatures. Plastics have specific characteristics and when exposed in excessively high temperatures these can be altered causing inaccurate or no readings of Radon gas particles. If kept out of direct sunlight the monitors will be able to handle all ambient conditions as known in Southern Africa. These solutions can be simple and cheap. The supplier will gladly assist clients with such procedures and solutions.

Monitors should not be placed in water. Virtually all areas with high humidity and wet conditions can be handled with the local monitors. Specifically for area monitoring the monitors should not be moved from the locations where they are deployed during measurement.