Overview
The YD-800 X/Gamma Online Radiation Alarm Monitor is a continuous radiation monitoring instrument designed for real-time measurement of X-ray and γ-ray radiation fields. It features a high-speed embedded microprocessor paired with a 7-inch IPS LCD touchscreen (1024×600), delivering both real-time monitoring capability with rapid response and a streamlined, user-friendly operator experience. The host unit communicates with detector probes via reliable RS485 connectivity, enabling real-time display of the individual dose rate reading of each connected probe, along with its current operational status (Normal / Disconnected / Over-Range). An optional supervisory Area Radiation Monitoring System software package is available upon project-specific requirements.
Performance Features
- High-speed embedded microprocessor ensures real-time data acquisition and status update.
- 7-inch 1024×600 IPS LCD color touchscreen with an intuitive operator interface designed for ease of use and minimal training.
- Selectable dose rate units — user-switchable between µGy/h and µSv/h.
- Multi-probe architecture — one host supports connection of multiple detector probes, with four channels as standard (expandable to 30+ channels).
- Automatic probe recognition (plug-and-play) for convenient field probe replacement by personnel.
- Continuously adjustable alarm thresholds across the full measurement range (factory default: high threshold 25 µGy/h, low threshold 0.0 µGy/h).
- Real-time probe status indication — Normal / Alarm / Over-Range / Disconnected.
- Multiple alarm modalities — standard audible and visual alarm; expandable to external alarm unit and relay switch contact output.
- Dual alarm mode per probe (high alarm / low alarm), providing flexible configuration for diverse radiological safety scenarios.
- Automatic threshold alarm logging with non-volatile onboard storage — data retained during power loss; alarm history can be manually retrieved.
- Integrated real-time clock (RTC) displaying year, month, and date; operation unaffected by mains power interruption.
- Communication interface: standard RS485, supporting transmission distances up to 800 metres.
- Optional built-in battery for in-vehicle mobile monitoring and applications with unstable mains power supply.
- Custom development available upon request.
Applications
Nuclear power plants (NPPs)
Radioactive waste storage facilities; industrial NDT (non-destructive testing) radiography
Radioisotope application plants; γ-irradiation facilities
Hospital diagnostic X-ray departments; Co-60 therapy and industrial applications; nuclear medicine departments
Radiation Detector Specifications
GM Tube Detector Specifications
| Parameter | Specification |
|---|---|
| Detector | GM tube detector (energy-compensated) |
| Measurement Range | 0.01 µSv/h ~ 2.5 mSv/h; optional 0.01 µSv/h ~ 1 Sv/h |
| Sensitivity | >5 CPS at 1 µSv/h (referenced to ¹³⁷Cs) |
| Response Time | ≤2 s |
| Relative Intrinsic Error | ≤ ±15% |
| Energy Response | 48 keV ~ 3 MeV, ≤ ±30% |
| Operating Environment | Temperature: −10°C to +50°C; Relative humidity: ≤98% (at 40°C) |
| Dimensions | Host: 260 × 160 × 68 mm (excl. stand); Probe: φ60 × 320 mm |
Scintillation Detector Specifications
| Parameter | Specification |
|---|---|
| Detector | Scintillator + Photomultiplier Tube (PMT) |
| Energy Response | 38 keV ~ 7 MeV |
| Detectable Radiation | X-rays, γ-rays |
| Measurement Range | Dose rate: 0.01 µSv/h ~ 10 mSv/h; Accumulated dose: 0 ~ 9999 mSv |
| Display | Wall-mounted 7-inch color LCD touchscreen |
| Sensitivity | >50 CPS at 1 µSv/h (referenced to ¹³⁷Cs) |
| Relative Intrinsic Error | ≤ ±10% (¹³⁷Cs, at 100 µSv/h) |
| Response Time | 1 s |
| Refresh Rate | 1 reading per second |
| Operating Environment | Temperature: −10°C to +50°C; Relative humidity: ≤95% (at 40°C) |
| Power Supply | AC mains, 220 V |
| Weight & Dimensions | Approx. 500 g; φ58 × 263 mm |
On-Site Installation — Radiology Department
