MR-8125 low-background gamma spectrometer for radionuclide content in building materials, soil and environmental samples.
Overview
The MR-8125 is a laboratory low-background gamma spectroscopy system for quantitative assay of low-level radionuclides in samples. It consists of a low-K NaI(Tl) scintillation detector, a lead-shielded low-background chamber, a digital multi-channel analyser (MCA) and PC-based spectrum software. The detector sits in a lead shield of at least 10cm lead-equivalent thickness, with anti-coincidence/shielding design reducing the integral background count rate over 59keV3MeV to a very low level. By collecting gamma spectra and comparing with calibrated standards, it identifies and quantifies specific activities of natural and artificial radionuclides such as U-238 (Ra), Th-232, K, Cs and Co in environmental, building-material, biological, water and soil samples. Widely used in environmental radiation monitoring, building-material radioactivity testing, uranium geology, nuclear emergency preparedness, radiation protection and research.
Applications
• Road and highway engineering laboratory testing
• Construction material quality control and acceptance
• Research and teaching laboratories
• Third-party inspection and certification bodies
Features
• Robust construction suitable for both laboratory and field use
• Compliant with relevant Chinese and international testing standards
• Complete with calibration certificate and operation manual
Technical Specifications
| Item | Specification |
| Detector | low-K NaI(Tl), φ75×75mm (3"×3") |
| Method | gamma-ray spectrometry |
| Energy range | approx. 40 keV – 3 MeV |
| Energy resolution | ≤7% at 661.7 keV (¹³⁷Cs) |
| Energy linearity | ≤±1% (50 keV–2 MeV) |
| MCA | 1024/2048 channels digital |
| Shielding | ≥10 cm Pb equivalent, low-background design |
| Background | integral ≤6 cps (59keV–3MeV) |
| HV supply | built-in, approx. +800V |
| Nuclides | ²²⁶Ra, ²³²Th, ⁴⁰K, ¹³⁷Cs, ⁶⁰Co, etc. |
| Samples | environmental, building materials, water, soil, biological |
| Software | PC spectrum software, nuclide ID and activity calculation |
| Applications | environmental monitoring, building materials, uranium geology, nuclear emergency |
Standards
GB/T, JTG, ASTM
Standard Delivery
• Main instrument unit
• Power cable
• Operation manual
• Spare parts kit
FAQ
Q1: What standards does the MR-8125 Low-Background Gamma Spectrometer comply with?
A1: The MR-8125 Low-Background Gamma Spectrometer is designed and manufactured in accordance with relevant Chinese national (GB) and transport industry (JTG) standards, as well as applicable ASTM and AASHTO international standards. A calibration certificate traceable to national standards is provided with each unit.
Q2: How often should the MR-8125 Low-Background Gamma Spectrometer be calibrated?
A2: We recommend annual calibration by authorized technicians or by iRoad after-sales service center. For high-frequency laboratory use, semi-annual calibration is advised. The instrument is supplied with a factory calibration certificate.
Q3: What is the lead time and do you provide training?
A3: Standard units are usually shipped within 7-15 working days. Custom configurations may require 20-30 days. iRoad provides on-site installation, commissioning and operator training for major equipment; remote video guidance is available for standard laboratory instruments.
Overview
The MR-8125 is a laboratory low-background gamma spectroscopy system for quantitative assay of low-level radionuclides in samples. It consists of a low-K NaI(Tl) scintillation detector, a lead-shielded low-background chamber, a digital multi-channel analyser (MCA) and PC-based spectrum software. The detector sits in a lead shield of at least 10cm lead-equivalent thickness, with anti-coincidence/shielding design reducing the integral background count rate over 59keV3MeV to a very low level. By collecting gamma spectra and comparing with calibrated standards, it identifies and quantifies specific activities of natural and artificial radionuclides such as U-238 (Ra), Th-232, K, Cs and Co in environmental, building-material, biological, water and soil samples. Widely used in environmental radiation monitoring, building-material radioactivity testing, uranium geology, nuclear emergency preparedness, radiation protection and research.
Applications
• Road and highway engineering laboratory testing
• Construction material quality control and acceptance
• Research and teaching laboratories
• Third-party inspection and certification bodies
Features
• Robust construction suitable for both laboratory and field use
• Compliant with relevant Chinese and international testing standards
• Complete with calibration certificate and operation manual
Technical Specifications
| Item | Specification |
| Detector | low-K NaI(Tl), φ75×75mm (3"×3") |
| Method | gamma-ray spectrometry |
| Energy range | approx. 40 keV – 3 MeV |
| Energy resolution | ≤7% at 661.7 keV (¹³⁷Cs) |
| Energy linearity | ≤±1% (50 keV–2 MeV) |
| MCA | 1024/2048 channels digital |
| Shielding | ≥10 cm Pb equivalent, low-background design |
| Background | integral ≤6 cps (59keV–3MeV) |
| HV supply | built-in, approx. +800V |
| Nuclides | ²²⁶Ra, ²³²Th, ⁴⁰K, ¹³⁷Cs, ⁶⁰Co, etc. |
| Samples | environmental, building materials, water, soil, biological |
| Software | PC spectrum software, nuclide ID and activity calculation |
| Applications | environmental monitoring, building materials, uranium geology, nuclear emergency |
Standards
GB/T, JTG, ASTM
Standard Delivery
• Main instrument unit
• Power cable
• Operation manual
• Spare parts kit
FAQ
Q1: What standards does the MR-8125 Low-Background Gamma Spectrometer comply with?
A1: The MR-8125 Low-Background Gamma Spectrometer is designed and manufactured in accordance with relevant Chinese national (GB) and transport industry (JTG) standards, as well as applicable ASTM and AASHTO international standards. A calibration certificate traceable to national standards is provided with each unit.
Q2: How often should the MR-8125 Low-Background Gamma Spectrometer be calibrated?
A2: We recommend annual calibration by authorized technicians or by iRoad after-sales service center. For high-frequency laboratory use, semi-annual calibration is advised. The instrument is supplied with a factory calibration certificate.
Q3: What is the lead time and do you provide training?
A3: Standard units are usually shipped within 7-15 working days. Custom configurations may require 20-30 days. iRoad provides on-site installation, commissioning and operator training for major equipment; remote video guidance is available for standard laboratory instruments.
