SMACH RG1100 Personal Radiation Dosimeter Alarm
| Brand | SMACH |
|---|---|
| Model | RG1100 |
| Type | Portable Dose Rate and Accumulated Dose Monitor |
| Detector | Energy-Compensated GM Tube |
| Radiation Type | X-ray and Gamma (γ) Radiation |
| Dose Equivalent Rate Range | 0.01 µSv/h – 1 mSv/h |
| Accumulated Dose Equivalent Range | 0.00 µSv – 999.9 Sv |
| Sensitivity | >1.5 CPS/µSv/h (relative to ¹³⁷Cs) |
| Energy Response | 48 keV – 3.0 MeV |
| Relative Error | <5% at 1 mSv/h |
| Operating Temperature | −10 °C to +50 °C (±10% drift) |
| Humidity Range | 0–95% RH at +35 °C (±10% drift) |
| Dimensions | 70 × 40 × 95 mm (L×W×H) |
| Weight | 100 g (including batteries) |
| Power Supply | Two AA alkaline cells |
| Display | OLED with bilingual (English/Chinese) UI |
| Alarm Modes | Audible, visual (LED flash), and vibration |
| Data Logging | Automatic alarm event storage |
| Optional Feature | Wireless mesh networking for centralized dose management |
Overview
The SMACH RG1100 Personal Radiation Dosimeter Alarm is a compact, high-sensitivity electronic dosimeter engineered for real-time monitoring of ambient ionizing radiation exposure in occupational settings. It operates on the principle of gas-filled Geiger-Müller (GM) detection, utilizing an energy-compensated GM tube optimized for uniform response across a broad photon energy spectrum—from 48 keV to 3.0 MeV—ensuring accurate dose equivalent estimation for both diagnostic X-ray and industrial/therapeutic gamma radiation fields. Unlike basic count-rate instruments, the RG1100 applies energy compensation algorithms in firmware to correct for inherent over-response at low energies, aligning its dose rate output with ICRP-defined radiation weighting factors and enabling compliance with ISO 6980-1:2021 (Reference radiation fields for calibrating dosemeters) and IEC 61526:2013 (Radiation protection instrumentation — Measurement of personal dose equivalents Hp(10) and Hp(0.07)). Designed as a wearable, battery-powered device, it continuously measures and displays ambient dose equivalent rate (Ḣ*(10)) and accumulated personal dose equivalent (H*(10)), supporting proactive radiation safety management under ALARA (As Low As Reasonably Achievable) principles.
Key Features
- Energy-compensated GM detector with calibrated sensitivity >1.5 counts per second per µSv/h (referenced to ¹³⁷Cs), minimizing spectral dependence errors in mixed-field environments.
- OLED display with dual-language interface (English and Chinese), supporting intuitive navigation and simultaneous readout of dose rate, accumulated dose, battery status, and alarm history.
- Triple-mode alert system: user-configurable audible beep, high-intensity LED flashing synchronized to dose rate magnitude, and tactile vibration—each independently enabled or combined per operational protocol.
- Fully programmable alarm thresholds for both instantaneous dose rate and cumulative dose, adjustable anywhere within the instrument’s full measurement span without requiring calibration recalibration.
- Onboard non-volatile memory automatically logs timestamped alarm events—including dose rate exceedance, accumulated dose limit breach, and detector blockage detection—retaining up to 200 entries for post-incident review.
- Ultra-low power architecture: two standard AA alkaline batteries provide ≥2,000 hours of continuous operation under typical field conditions (average dose rate <10 µSv/h), with low-battery warning and graceful shutdown.
Sample Compatibility & Compliance
The RG1100 is validated for use with photon-emitting radionuclides and X-ray generating equipment commonly encountered in regulated environments, including but not limited to ⁶⁰Co, ¹³⁷Cs, ¹⁹²Ir, ²⁴¹Am, and medical linear accelerators (6–15 MV). Its energy response curve meets the performance criteria specified in ANSI N42.20-2022 (Performance Criteria for Health Physics Instrumentation) for personal dosimeters intended for routine monitoring. The device conforms to electromagnetic compatibility (EMC) requirements per IEC 61326-1:2022 and environmental robustness standards per IEC 60529 (IP54 ingress protection rating). While not a TLD or OSL dosimeter, the RG1100 serves as a primary real-time alarm tool compliant with national occupational exposure limits defined in GBZ 128-2019 (China) and harmonized with IAEA Safety Standards Series No. GSR Part 3 (Radiation Protection and Safety of Radiation Sources).
Software & Data Management
Data retrieval is supported via optional USB-C interface (firmware update and log export) or integrated Bluetooth Low Energy (BLE) module for wireless synchronization with the SMACH DoseNet™ desktop application (Windows/macOS). DoseNet™ enables multi-user dose tracking, customizable reporting (daily/weekly/monthly summaries), automatic generation of audit-ready PDF logs compliant with GLP documentation practices, and integration with enterprise radiation safety management systems (RSMS) via CSV or HL7-compatible export. All stored alarm events include UTC timestamps, dose values, and operational mode flags—supporting traceability required under ISO/IEC 17025:2017 clause 7.7 (Results reporting) and FDA 21 CFR Part 11 (electronic records and signatures) when deployed in regulated pharmaceutical or nuclear medicine facilities.
Applications
The RG1100 is routinely deployed across sectors where personnel operate in proximity to unshielded or intermittently active radiation sources. Key use cases include: real-time dose oversight for radiographers during fluoroscopic procedures; perimeter monitoring for NDT technicians performing gamma radiography; entry-point screening at nuclear power plant access gates; dose verification during radioactive source handling in industrial irradiation facilities; and field-based surveying for naturally occurring radioactive material (NORM) in oilfield pipe scale or scrap metal recycling operations. Its lightweight form factor (100 g) and ergonomic clip design facilitate extended wear without fatigue, while its wide dynamic range accommodates both background-level surveillance (<0.2 µSv/h) and emergency response scenarios approaching regulatory intervention levels (e.g., 100 µSv/h).
FAQ
What radiation types does the RG1100 detect?
It is specifically calibrated for X-ray and gamma (γ) photon radiation. It is not sensitive to alpha, beta, or neutron radiation.
Can the alarm thresholds be customized per user?
Yes—both dose rate and accumulated dose alarm setpoints are fully configurable via the onboard menu, allowing alignment with facility-specific radiation protection protocols or national dose limits.
Does the RG1100 require annual calibration?
Per IEC 61526:2013, periodic calibration against traceable reference sources is recommended at least once per year, or after any physical damage or suspected performance deviation.
Is the device suitable for use in high-humidity industrial environments?
Yes—the housing meets IP54 specifications, ensuring reliable operation at up to 95% relative humidity at 35°C, with verified stability of <±10% reading drift under those conditions.
How is data integrity ensured during wireless transmission?
BLE communication employs AES-128 encryption, and all logged dose events are digitally signed to prevent tampering—supporting compliance with data integrity requirements under ISO 13485 and EU Annex 11 for medical device software validation.
