Radon sensor Aranet Radon Plus PRO TDSPSR02

Accurate Measurement of Critical Parameters

Radon is a naturally occurring radioactive gas that is colorless, odorless, and tasteless, requiring specialized instrumentation for detection. It emanates from the ground and can infiltrate buildings through cracks and openings in the foundation, potentially accumulating to hazardous levels indoors. The World Health Organization (WHO) identifies radon as the second leading cause of lung cancer globally, following tobacco use. Due to its temporal variability, continuous monitoring is essential for accurate risk assessment.

The Aranet Radon Plus PRO is an advanced continuous radon monitoring device engineered for applications demanding high precision and reliability. Featuring high-sensitivity sensors, wireless connectivity, and a low-power E-Ink display, it provides real-time radon concentration readings. Its extended battery life and durable design make it ideally suited for long-term indoor air quality monitoring in commercial and institutional buildings such as offices, educational facilities, and healthcare environments.

Part of the PRO sensor series, the Radon Plus PRO features wireless communication via the Sub-GHz ISM band (Aranet), automatically transmitting measurements to the Aranet PRO base station efficiently and without the need for wiring.

✅ For Professionals and Technicians
Ideal for engineers and indoor air quality specialists.
The Radon Plus PRO is a professional-grade measuring device designed for experts who require reliable, continuous data. Its high accuracy and integration with the Aranet system allow seamless incorporation into remote monitoring and building management systems. With pre-calibrated, long-term stable sensors, it is the right choice for audits, environmental studies, certifications, and ongoing radon exposure surveillance.

✅ For Institutional Users
Recommended for schools, healthcare facilities, public buildings, and businesses.
The Radon Plus PRO offers an effective, low-maintenance solution for continuous radon concentration monitoring, ensuring safer indoor environments. Its long battery life and wireless communication simplify installation in hard-to-reach areas, ensuring compliance with public health regulations without technical complexity.

✅ For Homeowners
For families who value health and safety at home.
Did you know that radon gas is one of the leading causes of lung cancer, second only to smoking? The Radon Plus PRO helps protect your family by providing continuous, hassle-free air quality monitoring. Compact, silent, and with years of autonomous operation, this device delivers clear, reliable information about your home environment.

✅ Practical Applications

• Monitoring in schools and kindergartens
• Environmental studies and radon mapping
• Continuous monitoring in residential and service buildings
• Occupational risk assessments
• Mitigation programs and controlled ventilation
• Integration with IoT systems for smart buildings

Radon Detector Characteristics

• Detection Type: Alpha decay event detection via ionization chamber
• Air Intake Mechanism: Natural diffusion
• Radon progeny filtration: Spunbound polyester
• Radon/Thoron discrimination: Not applicable
• Chamber volume: 137 cm³ (8.4 in³)
• Efficiency: 1 count/min at 84 Bq/m³ (2.3 pCi/L)

Sensor Performance – Radon Concentration

• Measurement range: 0 – 4000 Bq/m³ (0 – 108.10 pCi/L)
• Resolution: 1 Bq/m³ (0.02 pCi/L)
• First reliable measurement: After 1 hour of continuous operation
• Accuracy (24h, 7d, 30d averages): ±8%
• Instantaneous reading accuracy: Dependent on radon levels (see graph)
• Long-term drift: None observed (see technical notes)
• Time constant (τ): 30 minutes

Important Technical Notes

• The indicated accuracy applies after at least one hour of continuous operation. Before that, reliability may be limited due to a reduced averaging window for alpha decay event counts.
• The device is sensitive to static electricity. Handle with care, as friction may temporarily cause falsely elevated radon readings.
• Although calibrated for up to 4000 Bq/m³, the device can display readings up to 7900 Bq/m³ (214 pCi/L); however, accuracy beyond 4000 Bq/m³ is not guaranteed.
• Over time, the ionization chamber may accumulate long-lived radon progeny (e.g., Pb-210 with a 22-year half-life), leading to a gradual increase in readings even in radon-free environments. Estimated baseline shift is approx. 3 Bq/m³ per 1 (MBq·h)/m³ of cumulative exposure. For instance, continuous exposure to 1000 Bq/m³ over five years could result in a reading shift of around 150 Bq/m³.

Radon Plus PRO is the ideal choice for professionals seeking precision, durability, and connectivity in indoor air quality control, with a focus on radon detection.

According to Portuguese Decree-Law No. 108/2018, it is mandatory to assess exposure to radon gas in workplaces and public buildings, with a national reference level set at 300 Bq/m³.

Measuring radon is the only way to verify whether indoor levels exceed this national reference value and to ensure health and safety in occupied spaces.

National Reference Level – This refers to the annual average concentration above which public exposure is considered inappropriate, even if not an absolute limit. For radon, the reference value is 300 Bq/m³, as stated in Article 145 of Decree-Law No. 108/2018, December 3. It applies to workplaces, residences, and any building with prolonged public occupancy.

Frequently Asked Questions (FAQ)

1. What is radon, and why should I monitor it?
Radon is a naturally occurring, colorless, and odorless radioactive gas that can accumulate indoors and pose a serious health risk.

2. Where should I install the Radon Plus PRO?
Install it in frequently occupied rooms (like bedrooms or living rooms), about 1 meter above the floor, away from windows or direct ventilation sources.

3. Does the device require calibration?
It comes pre-calibrated. While periodic calibration may depend on institutional policies, the sensor has minimal long-term drift.

4. How can I access the data?
Measurements are wirelessly transmitted to the Aranet PRO base station and can be accessed in real time via web or app.

5. What happens when the battery runs out?
The battery lasts several years. When needed, it can be replaced by an authorized technician.

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