AD-II
Reference-Class Electrometer
The AD-II Electrometer is a high-precision, professional-grade instrument designed for radiotherapy dosimetry. By connecting to compatible ionization chambers, it provides real-time monitoring of radiation dose and dose rate. It serves as a reliable benchmark for evaluating LINAC output, verifying beam consistency, and performing comprehensive periodic quality assurance.
Compatible with
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Periodic QA for LINACs:
- Serves as a benchmark device for daily measurement and calibration of absolute dose output
- Verifies dose consistency and supports quarterly and annual QA protocols
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Dosimetric Data Acquisition:
- Pairs with small water phantoms to collect Percent Depth Dose (PDD) and Off-Axis Ratio (OAR) data
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Equipment Commissioning and Performance Verification:
- Validates dose output performance for treatment units such as LINACs and Cobalt-60 machines
- Ideal for new equipment acceptance testing or commissioning after major repairs and maintenance
Video


Key Features

High-Precision Dosimetry
The AD-II provides real-time detection and display of radiation dose (mGy), charge (pC), and dose rate (mGy/min). With a high-sensitivity response and measurement precision of 0.1 cGy, it meets the most stringent accuracy requirements. The system also features excellent linear repeatability and stable performance, ensuring highly reliable data for clinical decision-making.

Flexible Measurement Modes
To adapt to various clinical scenarios, the electrometer supports multiple operational modes, including conventional cumulative measurement, timed measurement, and data-locked continuous measurement. It also allows for manual setting and correction of polarization voltage (±400V), ambient temperature, and atmospheric pressure, providing physicists with full control over the measurement environment.

Broad Ionization Chamber Compatibility
The AD-II is designed with flexibility in mind, featuring a default TNC interface with an optional BNC configuration. While it comes standard with an IBA FC-65G ionization chamber, it is fully compatible with various models from major manufacturers like IBA and PTW. The system can store parameters for up to 20 different ionization chambers, offering versatile clinical utility.

Intelligent Touchscreen Operation
Equipped with a 7.8-inch full-color LCD touchscreen, the device offers an intuitive and modern user experience. It can manually save up to 200 sets of measurement data and automatically calculate absolute doses, eliminating the need for manual record-keeping. Furthermore, users can select historical data for instant comparative analysis of linearity and repeatability directly on the screen.
Technical Parameters
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Repeatability±0.2%
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Non-linearity<±0.2%
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Long-Term Stability<±0.3%
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Leakage Current±10fA, typical 1fA
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Dimensions (LxWxH)290.5mm x 227.7mm x 113mm
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Max Storage200
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RangeCharge: 2nC-20mC (0.1 pC resolution)
Current: 2pA-200nA (0.1 pA resolution) -
Weight2.55kg

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