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　　In the field of nuclear radiation monitoring, the performance of instruments is directly related to personnel safety and the accuracy of environmental assessment. When purchasing a radiation detector, the interpretation of core parameters is crucial. This article will focus on the two core dimensions of sensitivity and anti-interference ability, combined with the representative product parameters of KARRAY (Shanghai) Technology Co., Ltd., to provide a professional technical purchasing guide.
 

　　1. Sensitivity: “hearing” to capture weak signals
 

　　Sensitivity determines whether the instrument can accurately capture weak radiation signals in complex background noise. Evaluating sensitivity usually requires attention to the following parameters:
 

　　1. Detection efficiency and response range
 

　　Sensitivity is first reflected in the physical characteristics of the detector. Take Digilert 200, an agent of KARRAY Technology, as an example. The LND712+ halogen-filled Geiger counter tube it uses has high detection efficiency. For different rays, its sensitivity is as follows: α-ray ≥2.5 MeV (detection efficiency is about 80%), β-ray ≥50 keV (detection efficiency is about 35%), and γ-ray ≥10 keV. This means that the instrument can not only detect high-energy rays, but also respond well to weakly penetrating α-rays and low-energy γ/X-rays, ensuring that low-level radiation is not missed during environmental monitoring.
 

　　2. Energy response range
 

　　The energy response range determines how wide a frequency band the instrument can "hear". The MKS-07 universal radiation detector (agent of Garry Technology) has an energy response range of 0.05 ~ 3.0 MeV for γ/χ ray detection, and a β radiation range of 0.15 ~ 3.0 MeV. This wide energy response characteristic enables it to adapt to a variety of complex scenarios ranging from low-energy X-ray machines to high-energy industrial flaw detection, avoiding measurement blind spots caused by energy mismatch.
 

　　2. Anti-interference ability: stay “calm” in complex environments
 

　　Anti-interference ability is the key for the instrument to maintain stable operation in strong electromagnetic fields, high temperature and humidity or high radiation fields, and is directly related to the reliability of data.
 

　　1. Anti-saturation ability
 

　　When the instrument suddenly enters a strong radiation field, if the anti-saturation capability is insufficient, the detector will "crash" due to an excessively high count rate, resulting in invalid readings. Digilert 200 has strong anti-saturation ability, and its reading can still display the "OVERRANGE" prompt in a radiation field up to 100 times the maximum reading, instead of directly returning to zero or garbled characters, which provides valuable evacuation basis for emergency responders.
 

　　2. Environmental adaptability
 

　　Anti-interference is not only targeted at the radiation field, but also includes the physical environment. The operating temperature range of the MKS-07 detector reaches -25°C ~ +55°C, which is much wider than the 0-40°C range of ordinary laboratory instruments. This wide temperature range design enables it to work stably outdoors in extremely cold northern winters or hot summers, adapting to the harsh operating environments of firefighting, emergency and other departments.
 

　　3. Anti-electromagnetic interference (EMI)
 

　　Modern electronic equipment is densely packed, and electromagnetic interference is everywhere. The RadEye PRD-ER personal radiation protection meter represented by KARRAY Technology particularly emphasizes its "excellent anti-electromagnetic interference capabilities." This usually means that the instrument uses a shielding design or digital filtering technology to maintain stable readings and reduce false alarms in strong electromagnetic environments such as airport security checks and near medical equipment.
 

　　3. Technical analysis of core parameters
 

　　Combining the above products, we can extract several specific values that need to be paid attention to when purchasing:
 

　　1. Dose rate range: The measurement range of Digilert 200 is 0.001 ~ 200 mR/hr (or 0.01 ~ 2,000 uSv/hr). This starting range as low as 0.001 mR/hr enables it to accurately measure environmental background radiation and is suitable for home decoration stone testing or environmental assessment; while the γ dose equivalent rate range of MKS-07 is as high as 0.1µSv/h ~ 2.0Sv/h, it is more suitable for high dose rate scenarios such as nuclear power plants or industrial flaw detection.
 

　　2. Accuracy and error: The accuracy of Digilert 200 is ±10% (typical) to ±15% (maximum), and the relative basic error of MKS-07 is ±15%. For professional applications, errors within ±15% are usually acceptable, but if used for scientific research, you need to choose a higher-precision model.
 

　　3. Data storage and transmission: MKS-07 supports up to 4096 sets of data storage and can be output through infrared interface; Digilert 200 has a built-in data logger and USB port. This function is crucial for applications that require long-term monitoring and reporting (such as environmental protection department law enforcement and nuclear facility inspections).
 

　　4. Suggestions on purchasing
 

　　1. Scene matching: If used in home environment, stone inspection or daily emergency, Digilert 200 is an ideal choice due to its light weight (220g), long battery life (about 2000 hours) and α/β/γ full-ray detection capabilities. If used for nuclear emergency, firefighting or industrial non-destructive testing, MKS-07's wide range, high protection level and optional neutron detection function are more suitable.
 

　　2. Certification and compliance: The above products represented by KARRAY Technology all mention CE certification or comply with relevant standards. When purchasing, be sure to confirm whether the instrument has the National Metrology Certification (CMC) or meets the GB/T standards. This is the basic guarantee for the legality of the data.
 

　　Summary: When purchasing a radiation detector, you should not just look at the brand or appearance, but should analyze its technical parameters in depth. The product line provided by KARRAY (Shanghai) Technology Co., Ltd. covers a variety of needs from personal protection to professional emergency response. Its products perform well in terms of sensitivity (wide energy response, high detection efficiency) and anti-interference ability (anti-saturation, wide temperature range), and can be used as an important reference for professional users in selection.