ATOMTEX AT2503 Personal Dosimeter

Overview

The ATOMTEX AT2503 Personal Dosimeter is a compact, microprocessor-controlled passive-active hybrid dosimetric instrument engineered for real-time monitoring of personal ambient dose equivalent Hp(10) in occupational radiation environments. Designed in accordance with IEC 61526 and ISO 4037-3 standards, it employs an energy-compensated Geiger-Müller (GM) detector with integrated spectral filtering to deliver reliable Hp(10) response across a broad photon energy range—from 50 keV to 1.5 MeV—covering diagnostic X-ray, industrial radiography, nuclear medicine, and reactor-related gamma fields. Unlike passive TLD or OSL badges, the AT2503 provides immediate readout, continuous background compensation, and active alarm functionality, making it suitable for dynamic exposure scenarios where rapid dose assessment and intervention thresholds are critical. Its robust mechanical architecture—including IP67-rated ingress protection—ensures operational integrity under field conditions involving dust, moisture, mechanical shock, and electromagnetic interference typical of nuclear power plants, radiopharmaceutical facilities, and emergency response operations.

Key Features

• Simultaneous real-time measurement of accumulated Hp(10) (1 µSv – 10 Sv) and Hp(10) dose rate (0.1 µSv/h – 0.5 Sv/h), with 0.1 µSv resolution
• Energy-compensated GM tube with optimized filtration for flat Hp(10) response across 50 keV – 1.5 MeV; calibrated against ¹³⁷Cs reference source (±5% uncertainty)
• Automatic background subtraction and continuous self-diagnostic routines—including GM tube health monitoring and battery voltage tracking
• Eight independently configurable dose and dose rate alarm thresholds with audible (≥85 dB) and visual (LED + LCD flash) alerts
• Ruggedized housing rated IP67 (dust-tight, submersible up to 1 m for 30 min); operating temperature range: −10 °C to +50 °C
• Onboard non-volatile memory stores cumulative dose history with time stamps; data retention exceeds 10 years without power
• Compact form factor (92 × 58 × 22 mm) and lightweight design (≤120 g) enable unobtrusive wear in shirt pockets or on lapel clips

Sample Compatibility & Compliance

The AT2503 is validated for use with standard anthropomorphic phantoms and calibrated traceably to national metrology institutes via a 30 × 30 × 15 cm water-equivalent phantom per IEC 61017 requirements. It meets European CE marking criteria under Directive 2014/30/EU (EMC) and 2014/53/EU (Radio Equipment), and conforms to ANSI N42.20 for personal radiation dosimeters. Its performance aligns with IAEA Safety Standards Series No. GSR Part 3 (Radiation Protection and Safety of Radiation Sources) and supports compliance with occupational dose recordkeeping mandates under 10 CFR 20 (NRC) and EURATOM Basic Safety Standards Directive 2013/59. The device is not intended for neutron or beta-particle dosimetry; its Hp(10) response is optimized exclusively for penetrating photon fields.

Software & Data Management

Data acquisition and archival are supported through the optional ATOMTEX DOSI-PC software suite, which interfaces via an IR-enabled desktop reader (AT2503-READER) and RS-232 serial connection. The software enables automated batch download, dose trend visualization, ALARA reporting, and export to CSV or XML formats compatible with enterprise radiation safety management systems (e.g., RadPro, RAMP, or internal LIMS). All firmware updates, alarm threshold configuration, and calibration coefficient loading are performed through authenticated secure channels. Audit trails—including operator ID, timestamped data transfers, and system-level configuration changes—are maintained in accordance with GLP/GMP documentation practices and satisfy FDA 21 CFR Part 11 electronic record requirements when deployed in regulated pharmaceutical or clinical trial settings.

Applications

• Real-time personnel monitoring in nuclear power plant maintenance zones, fuel handling areas, and spent fuel pool environments
• Dose tracking for interventional radiologists, fluoroscopy technicians, and PET/CT cyclotron operators
• Field deployment during radiological emergency response (e.g., HAZMAT teams, IAEA Incident and Emergency Centre support)
• Quality assurance audits in industrial radiography (NDT) and gamma sterilization facilities
• Training and procedural validation in radiation safety officer (RSO) certification programs
• Integration into centralized radiation protection dashboards for multi-site dose surveillance

FAQ

What is the calibration basis for the AT2503’s Hp(10) response?
The instrument is factory-calibrated using a ¹³⁷Cs reference source traceable to national standards, with additional energy-response verification performed in a 30 × 30 × 15 cm water-equivalent phantom per IEC 61017 protocols.
Can the AT2503 measure neutron or beta radiation?
No. It is specifically designed and type-tested for photon (X- and gamma-ray) fields only. Neutron or beta dosimetry requires dedicated detectors (e.g., CR-39 track etch or thermoluminescent albedo dosimeters).
Is firmware update capability available in the field?
Yes—updates are delivered via DOSI-PC software and require physical connection to the IR reader; no internet connectivity is needed on the dosimeter itself.
How long does the battery last under continuous operation?
With alkaline AA batteries, typical service life exceeds 2,000 hours at 25 °C and average dose rate <10 µSv/h; low-battery warning activates at ≤1.1 V per cell.
Does the device support multi-user assignment in shared environments?
Yes—each unit stores a unique serial identifier; DOSI-PC software allows user profile binding, role-based access control, and individual dose ledger generation.