YD-850 Online Radiation Monitoring System | Fixed-Area Radiation Monitor

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The YD-850 Online Radiation Monitoring System is a next-generation nuclear radiation monitoring and alarm system. It integrates radiation dose rate measurement data, environmental PM₂.₅ concentration, and ambient temperature and humidity into a single unified platform, enabling personnel to readily assess the environmental safety conditions of the workplace at a glance.

The system is designed for deployment in complex and demanding radiological work environments, including but not limited to: the nuclear industry, radioisotope production, nuclear medicine departments, radiological device facilities, nuclear power plants (NPP), irradiation facilities, environmental radiation protection, and radiological health sectors.

Features

• 8-inch 1280×800 IPS high-resolution color LCD with an intuitive operator interface;
• Real-time readout of radiation dose rate with user-selectable units (µSv/h, µGy/h);
• Dynamic real-time trending display of dose rate curves from all connected probes;
• Integrated laser-based particle sensor for continuous real-time PM₂.₅ concentration monitoring at the host location;
• Integrated high-accuracy temperature and humidity sensor for real-time ambient condition monitoring at the host;
• Multi-channel detector capacity — the system host supports connection of multiple radiation detectors (X-γ probes, neutron probes);
• Automatic detector identification (hot-swap) for simplified field replacement and maintenance;
• Real-time clock function displaying year, month, and date; clock operation persists through power loss;
• Adjustable alarm threshold across the full measurement range, with multi-modal alarm outputs — audible and visual alarm as standard; optional 4-channel relay contact output for external alarm actuation;
• Automatic threshold alarm recording with non-volatile onboard storage — data retained during power cycles; alarm history manually retrievable;
• Probe communication: RS485 (wired);
• Supervisory interface: RS485 and Ethernet, supporting Modbus RTU and Modbus TCP protocols respectively; data accessible via supervisory software (optional);

Configurable Detector Options

For X-γ: Configurable as GM detector, scintillation detector, or silicon semiconductor detector

For neutron: Configurable as ³He proportional counter

Supervisory Radiation Monitoring Management Software (Optional / Customizable)

• Real-time curve display with Y-axis zoom, X-axis span adjustment, and auto-scaling;
• Supports up to 32 probes or hosts, with color-coded curves for each channel;
• Parameter configuration settings;
• Adjustable transmission interval, data logging interval, and channel naming;
• Historical data functions: query, delete, clear, archive, and export;
• Automatic statistical computation of maximum, minimum, and mean values from queried datasets;

Detector Specifications

GM Detector

Parameter	Specification
Detector	GM detector (energy-compensated)
Measurement Range	0.01 µSv/h ~ 2.5 mSv/h (or 0.1 µSv/h ~ 300 mSv/h)
Sensitivity	>5 CPS at 1 µSv/h (referenced to ¹³⁷Cs)
Response Time	1 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

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Scintillation Detector

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 ~ 1 Sv/h; Accumulated dose: 0 ~ 9999 mSv
Display	Desktop 8-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

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Ionization Chamber Detector

Parameter	Specification
Detector	Ionization chamber
Energy Range	60 keV ~ 7 MeV
Detectable Radiation	X-rays, γ-rays
Measurement Range	0.1 µGy/h ~ 1 Gy/h
Relative Intrinsic Error	≤ ±15% (¹³⁷Cs, 661 keV)
Response Time	≤ 2 s
Display	8-inch color LCD touchscreen
Operating Environment	Temperature: −10°C to +50°C; Relative humidity: ≤95% (at 40°C)
Power Supply	AC mains, 220 V

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Semiconductor Detector

Parameter	Specification
Detector	Silicon semiconductor detector
Measurement Range	1 µSv/h ~ 2 Sv/h
Energy Response	28 keV ~ 5 MeV
Sampling Interval	5 s
Measurement Error	≤ ±15%
Operating Environment	Temperature: −10°C to +50°C; Relative humidity: ≤98% (at 40°C)
Dimensions	Host: 320 × 160 × 68 mm (excl. stand); Probe: φ41 × 210 mm

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Neutron Detector

Parameter	Specification
Detector	³He proportional counter
Measurement Range	0.1 µSv/h ~ 100 mSv/h
Energy Response	0.025 eV ~ 16 MeV
Sensitivity	>1.4 CPS per µSv/h
Operating Environment	Temperature: −20°C to +50°C; Relative humidity: ≤98% (at 40°C)
Measurement Error	≤ ±15%
Dimensions	Host: 260 × 160 × 68 mm (excl. stand)
Probe	Spherical: φ260 × 280 mm; Cylindrical: φ200 × 250 mm
Weight	Approx. 9 kg (excl. mounting bracket)