Sunnuclear 1028 XP Continuous Radon Monitor

Overview

The Sunnuclear 1028 XP Continuous Radon Monitor is a field-deployable, regulatory-compliant instrument engineered for long-term, unattended radon-222 gas concentration monitoring in indoor air environments. It operates on the electrostatic collection principle: airborne radon progeny (primarily ²¹⁸Po and ²¹⁴Po) are drawn into the detection chamber via an integrated active pump, where they deposit onto a passivated silicon alpha detector surface under a controlled electric field. The resulting alpha particle emissions are counted in real time, and concentration is calculated using calibrated collection efficiency, flow rate, and decay correction algorithms. Designed to meet U.S. EPA and ASTM D1429-22 requirements for residential and commercial radon screening, the 1028 XP delivers trace-level sensitivity (0.1 pCi/L LOD), high reproducibility (<7% 24-hour uncertainty), and continuous temporal resolution — essential for identifying diurnal patterns, ventilation effects, and mitigation efficacy verification.

Key Features

• Active sampling system with precision-matched volumetric airflow control (±2% accuracy), ensuring consistent collection efficiency across temperature and pressure gradients
• Electrostatic collection chamber with low-background, passivated silicon alpha detector and pulse-height discrimination for selective progeny identification
• 2.8-inch full-color resistive touchscreen interface with intuitive menu navigation, real-time graphing, and on-device configuration of measurement parameters
• Programmable measurement protocols: customizable continuous run duration (1–999 hours), pre-measurement delay (0–48 hours), and data logging interval (1–12 hours)
• Integrated motion sensor for tamper detection and automatic lockout; PIN-protected configuration access to prevent unauthorized parameter changes
• Onboard data storage capacity of 10,000 timestamped records (radon concentration, temperature, pressure, humidity, if optional sensors installed)
• USB-C powered operation (100–240 V AC adapter included); field-replaceable 4×AA alkaline battery pack supporting up to 300 hours of continuous operation
• FCC-certified Bluetooth 5.0 module for secure local pairing with iOS/Android devices running the One RADON mobile application

Sample Compatibility & Compliance

The 1028 XP is validated for use in residential dwellings, schools, office buildings, and multi-family housing units per EPA Protocol for Radon Testing (EPA 402-R-92-002) and ASTM E1465-22 Standard Practice for Radon Testing in Buildings. Its active sampling architecture ensures representative integration over variable air exchange rates (ACH = 0.1–2.0 h⁻¹). The instrument complies with ANSI N42.27A-2020 for radon monitor performance criteria and carries formal certification from the National Radon Proficiency Program (NRPP), Canadian National Radon Proficiency Program (C-NRPP), and National Radon Safety Board (NRSB). All units ship with an NIST-traceable calibration certificate issued by Sunnuclear’s A2LA-accredited calibration laboratory (ISO/IEC 17025:2017).

Software & Data Management

The 1028 XP interfaces natively with the One RADON software suite — a validated desktop application (Windows/macOS) and companion mobile app (iOS/Android) supporting full data download, visualization, statistical analysis (mean, median, standard deviation, percentiles), and automated report generation compliant with EPA and state health department submission formats. Data exports support CSV, PDF, and XML (for integration with LIMS or environmental management systems). Optional LTE cellular module enables encrypted, TLS 1.2-secured transmission to the One RADON Cloud Platform, providing remote device status monitoring, over-the-air firmware updates, and real-time alerting (email/SMS) upon user-defined threshold breaches. Audit trails, electronic signatures, and 21 CFR Part 11–compliant user access logs are available with enterprise licensing.

Applications

• Long-term radon screening in real estate transactions (per EPA Radon Risk Assessment Guidelines)
• Post-mitigation verification testing following active soil depressurization or HVAC-based interventions
• Occupational exposure assessment in underground workplaces (mines, tunnels, basements) per OSHA Technical Manual Section III: Chapter 2
• Research-grade temporal profiling of radon dynamics in relation to barometric pressure, HVAC cycling, and seasonal infiltration patterns
• Public health surveillance programs requiring GLP-aligned documentation and chain-of-custody tracking
• Integration into smart building management systems via Modbus TCP or RESTful API (with LTE module)

FAQ

What is the minimum detectable radon concentration, and how is it determined?
The 1028 XP achieves a lower limit of detection (LLD) of 0.1 pCi/L (3.7 Bq/m³) based on ISO 11929:2019 methodology — defined as the activity concentration yielding a net signal three standard deviations above background count rate over a 24-hour integration period.
Does the instrument require periodic recalibration, and what is the recommended interval?
Annual recalibration is recommended per NRPP and EPA guidance. Sunnuclear provides factory recalibration services traceable to NIST Standard Reference Material 4969 (Radon-in-Air Calibration Source), with full uncertainty budget documentation.
Can the 1028 XP operate without external power for extended deployments?
Yes — with four AA alkaline batteries, the unit maintains continuous sampling and logging for up to 300 hours (~12.5 days) at standard 1-hour logging intervals and ambient temperatures between 10–30°C.
Is the data output compatible with regulatory reporting requirements in U.S. states?
Yes — One RADON software generates reports conforming to EPA Form 5200-1, NY State DOH Radon Report Format, and CA Radon Mitigation Contractor Reporting Standards, including certified technician ID, location metadata, and calibration traceability statements.
How does the motion sensor enhance data integrity in unattended monitoring?
The integrated accelerometer triggers an event flag and locks configuration menus when physical displacement exceeds 15° tilt or impact acceleration >2g — preventing accidental or intentional tampering and enabling forensic audit of measurement continuity.