台式自动平衡低速离心机（实验室通用型）刑事技术实验室与司法鉴定合规应用介绍
作者：毕思特科技 来源：毕思特科技 浏览数：12 发布时间：2026/4/9 9:14:34
台式自动平衡低速离心机（实验室通用型）刑事技术实验室与司法鉴定合规应用介绍
【重要合规前置声明】本设备为刑事技术实验室、法医司法鉴定专用基础预处理设备，仅面向具备法定法医物证鉴定、刑事技术检验、毒物毒品分析资质的公安、检察、司法行政、司法鉴定等国家机关及授权鉴定机构定向研发、生产与销售，不向任何个人、无资质企业及非授权单位提供。本设备的安装、操作与应用，必须严格遵守《中华人民共和国刑事诉讼法》《中华人民共和国司法鉴定程序通则》《法庭科学 DNA 实验室规范》《法庭科学毒物毒品分析实验室规范》《实验室生物安全通用要求》等国家法律法规与行业技术标准，必须由经过专业培训的实验室技术人员规范操作，严禁无资质单位和个人违规使用，严禁因操作不当导致涉案生物检材污染、损坏与灭失。
产品概述
台式自动平衡低速离心机（实验室通用型），是一款专为刑事科学技术实验室日常涉案检材预处理深度设计的专业台式离心分离设备，也是法医 DNA 检验、毒物毒品分析、血清学检验、微量生物物证处理全流程中的核心基础装备。本设备核心通过可控的稳定离心力场，实现对血液、体液、组织裂解液、物证洗涤液等混合涉案样本中不同密度成分的快速、高效、标准化分离与富集，为后续的法医鉴定流程提供合格的预处理样本。
设备采用先进的单片机智能控制系统与全触摸数字操作界面，集成高灵敏度自动平衡、电动安全门锁、运行状态实时监控等多重安全与便捷功能，可完美适配刑事技术实验室中 DNA 提取纯化、血清学检验、毒物仪器分析、微量物证富集等关键前处理步骤的需求，为涉案检材的标准化处理提供稳定、可靠、可重复的操作平台，是保障刑事技术实验室后续检测结果准确性、实验流程规范性、鉴定结果司法有效性的基础性必备装备。
技术原理
本设备核心基于离心沉降分离原理工作，设备的转速控制精度、离心力稳定性、自动平衡补偿能力，是保障涉案生物检材分离效果、样本完整性、后续检验结果准确性的核心基础，也是确保司法鉴定流程合规可追溯的关键前提。
设备通过高性能无刷电机驱动离心转子做高速稳定旋转，在密闭的离心腔体内产生强大且均匀的离心力场；置于转子适配器中的样本管内，不同密度与质量的组分，包括细胞碎片、蛋白质、核酸溶液、血细胞、上清液等，在该离心力场的作用下，会以不同的沉降速率向离心管底部定向移动，从而实现固体颗粒物与液体的高效分离，或是不同密度液体组分的清晰分层，完成涉案生物检材的目标成分富集与杂质去除。
设备内置高灵敏度自动平衡系统，可实时检测转子运行过程中的平衡状态，自动补偿对称放置的样本管之间的微量质量差异，无需操作人员精准配平，即可确保转子高速运行过程中的平稳性，有效避免因样本不平衡导致的剧烈振动、运行噪音、设备损坏，甚至样本倾覆、灭失等问题，尤其适配刑事技术实验室中珍贵、微量、不可复现的涉案生物检材的处理需求，全程保障样本安全与设备运行稳定。
核心功能与合规实战价值
智能数显控制系统，保障检材处理标准化与可追溯性
设备采用全触摸数字控制面板，可精准设定并实时清晰显示设定转速、实时运行转速、剩余运行时间等核心参数，操作流程直观简便，参数设定精度高，无需复杂的人工调试，大幅降低了操作人员的培训门槛。单片机智能控制系统可确保每一次运行的转速、时间等参数完全一致，实现涉案检材处理的全流程标准化、可重复操作，完全符合司法鉴定机构对检材处理流程可追溯、可复核的核心要求，有效避免人工操作误差导致的检验结果偏差，保障每一份涉案检材的处理流程规范统一，确保鉴定结果的司法有效性。
高灵敏度自动平衡系统，全方位保护珍贵微量法医检材
设备内置工业级高灵敏度自动平衡系统，可有效补偿对称放置样本管之间的微量质量差异，无需人工精准配平即可实现平稳运行，彻底解决了传统离心机需要人工精准配平的操作痛点，大幅提升了检材处理效率，同时避免了配平误差导致的样本振动、倾覆风险。针对刑事技术实验室中常见的微量血迹、精斑、唾液斑、接触性脱落细胞等珍贵、不可复现的涉案检材，可在离心分离富集过程中，全程保障样本管的稳定运行，避免样本损失、交叉污染，最大限度保留检材中的有效检测成分，提升微量检材的检验成功率，为案件侦办提供更多关键物证线索。
多重安全防护设计，契合实验室生物安全管理规范
设备配备工业级电动安全门锁装置，设备运行过程中门盖自动锁闭，无法手动开启，有效防止高速旋转过程中意外开盖造成的生物样本飞溅、人员伤害等安全事故；设备停机、转子完全停转后，门盖自动解锁，大幅提升了操作的安全性与便捷性。整机采用紧凑化静音设计，运行过程中噪音低、振动小，可直接放置于超净工作台、生物安全柜内使用，完美适配生物安全二级实验室的使用要求，有效避免涉案生物检材中的病原微生物扩散造成的实验室生物安全风险，完全符合《实验室生物安全通用要求》的相关管理规定，全方位保障实验室操作人员的职业健康与实验室生物安全。
多规格灵活容量适配，满足刑事实验室多样化检材处理需求
设备配备多款标准化转子适配器，可全面兼容多种规格的实验室常用离心管，包括 15ml 离心管 ×8 孔、10ml 离心管 ×8 孔、5ml 离心管 ×12 孔的适配规格，可根据涉案检材的体积、类型，灵活更换对应的转子适配器，应对不同体积、不同类型样本的分离处理需求。无论是命案、性侵案件中的大宗血液、组织检材，还是盗窃、抢劫案件中的微量接触性生物物证洗涤液，都可实现高效的分离富集处理，完美适配刑事技术实验室多样化的检材类型与处理流程，一台设备即可覆盖实验室绝大多数低速离心预处理需求，提升实验室设备利用率与检材处理效率。
法定授权范围内的合规应用场景
本设备所有应用场景均严格遵守国家相关法律法规与刑事技术检验规范，仅可在具备法定资质的实验室、由专业培训人员规范操作，核心合规应用场景包括四大类：
法医 DNA 检验生物样本前处理
作为法医 DNA 实验室的必备基础设备，主要用于命案、性侵、伤害等刑事案件中涉案生物检材的预处理，包括从全血样本中分离血清与血细胞，从唾液斑、精斑、毛发等体液、组织检材的浸出液中分离上皮细胞、精子细胞，从组织裂解液中分离细胞碎片与核酸上清液，为后续的 DNA 提取、纯化、扩增、分型检验提供合格的预处理样本，有效去除杂质对 DNA 检验结果的干扰，提升微量检材的 DNA 检验成功率，为案件的个体识别、嫌疑人锁定提供科学依据。
法医毒物毒品分析检材纯化制备
在投毒、吸毒、药物过量致死等案件的毒物毒品分析工作中，用于涉案血液、尿液、胃内容物、组织匀浆等生物检材的离心预处理，通过离心分离去除检材中的颗粒杂质、沉淀蛋白、组织残渣等干扰成分，获取澄清的上清液，为后续的气相色谱 - 质谱（GC-MS）、液相色谱 - 质谱（LC-MS）等仪器分析提供纯化后的样本，有效去除基质干扰，提升毒物毒品定性定量分析结果的准确性与灵敏度，为投毒案件定性、吸毒行为认定、死亡原因推断提供科学的鉴定依据。
现场微量生物物证富集与浓缩处理
针对盗窃、抢劫等接触性犯罪案件现场提取的微量生物物证，包括作案工具、门窗把手、饮料瓶、烟头等载体上的接触性脱落细胞，以及现场遗留的微量血迹、体液斑迹的洗涤液，通过高速离心进行目标细胞、生物成分的富集与浓缩，将原本含量极低、无法直接检测的微量生物成分富集到离心管底部，大幅提升目标成分的浓度，提高后续 DNA 检验、生物成分检测的灵敏度，为疑难微量物证的成功检验提供基础支撑，为案件侦破提供关键线索。
刑事技术实验室常规实验辅助操作
可广泛应用于刑事技术实验室的各类常规实验辅助操作，包括实验室混合试剂的快速混匀与分层、PCR 扩增反应后产物的短暂离心、管壁液滴的收集、抗体抗原反应后的离心分离、微量沉淀的分离收集等，适配法医血清学检验、微量物证分析、文件检验等多专业的实验操作需求，是刑事技术实验室通用性最强的基础预处理装备。
核心技术参数
设备最高转速为 4000 转 / 分钟，采用单片机智能控制方式，配备全触摸数显操作面板，核心功能包括样本自动平衡、运行中电动安全门锁、转速与运行时间连续可调，属于台式低速自动平衡离心机。设备转子配备多款标准适配器，其中适配器 1 可兼容 15ml 离心管，最大容量为 8 孔；适配器 2 可兼容 10ml 离心管，最大容量为 8 孔；适配器 3 可兼容 5ml 离心管，最大容量为 12 孔，可根据样本处理需求灵活更换适配。
合规实战应用案例
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某市公安局刑事技术支队受理一起恶性性侵案件，受害人报案后，法医在受害人身上及案发现场提取了多处可疑精斑检材，以及嫌疑人遗留的烟蒂、饮料瓶等接触性物证，检材均为微量生物检材，有效成分含量极低，对前处理流程要求极高。实验室检验人员使用本台式自动平衡低速离心机，对精斑浸出液、唾液斑洗涤液进行离心富集处理，通过设定标准化的转速与离心时间，成功富集到了嫌疑人的精子细胞与口腔上皮细胞，有效去除了检材中的载体杂质与干扰成分，为后续的 DNA 提取与纯化提供了合格的预处理样本。最终检验人员成功从多处微量检材中获得了完整的嫌疑人 STR 分型图谱，录入全国法医 DNA 数据库后成功比中了有前科的嫌疑人刘某某，为案件的快速侦破提供了决定性的科学证据，本设备稳定的离心分离效果、微量样本富集能力，为本次疑难微量检材的成功检验提供了关键基础支撑。
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某市发生一起疑似投毒致人死亡案件，死者家属对死亡原因存在异议，报案要求公安机关查明死亡原因。法医对死者进行了解剖，提取了死者的血液、尿液、胃内容物、肝脏组织等生物检材，委托刑事技术实验室进行毒物毒品分析。由于检材中含有大量的组织残渣、蛋白沉淀等基质干扰成分，直接进行仪器分析会严重影响检测结果的准确性，检验人员使用本台式自动平衡低速离心机，对不同类型的检材进行了批量离心预处理，通过离心分离去除了检材中的固体杂质与沉淀蛋白，获取了澄清的上清液，再通过前处理后进行气相色谱 - 质谱联用分析。最终检验人员在死者的血液、胃内容物中成功检出了剧毒鼠药成分，明确了死者系毒鼠强中毒死亡，为案件的定性与侦查方向提供了关键的科学依据，后续侦查人员根据检验结果成功抓获了投毒嫌疑人，破获了该起投毒杀人案件。
Application Introduction of Desktop Automatic Balancing Low-Speed Centrifuge (General Laboratory Type) in Criminal Technology Laboratory and Judicial Authentication
【Important Compliance Pre-Declaration】This equipment is the basic pre-processing equipment dedicated to criminal technology laboratories and forensic judicial authentication. It is only developed, produced and sold for state organs and authorized authentication institutions with legal qualifications of forensic material evidence identification, criminal technical inspection, and toxic and drug analysis, including public security organs, procuratorates, judicial administrative organs, and judicial authentication institutions, and will not be provided to any individual, unqualified enterprise or non-authorized unit. The installation, operation and application of this equipment must strictly abide by national laws, regulations and industry technical standards such as the Criminal Procedure Law of the People's Republic of China, General Rules for Judicial Authentication Procedures of the People's Republic of China, Forensic Science DNA Laboratory Specification, Forensic Science Toxic and Drug Analysis Laboratory Specification, and General Requirements for Laboratory Biosafety. It must be operated in a standardized manner by laboratory technicians who have received professional training. It is strictly prohibited for unqualified units and individuals to use it in violation of regulations, and it is strictly prohibited to cause pollution, damage and loss of involved biological evidence due to improper operation.
Product Overview
The Desktop Automatic Balancing Low-Speed Centrifuge (General Laboratory Type) is a professional desktop centrifugal separation equipment deeply designed for the daily pre-processing of involved evidence in criminal science and technology laboratories, and is also the core basic equipment in the whole process of forensic DNA inspection, toxic and drug analysis, serological inspection, and trace biological evidence processing. The core of this equipment realizes the fast, efficient and standardized separation and enrichment of components with different densities in mixed involved samples such as blood, body fluids, tissue lysates and evidence washing liquid through a controllable and stable centrifugal force field, providing qualified pre-processed samples for the subsequent forensic identification process.
The equipment adopts an advanced single-chip microcomputer intelligent control system and a full-touch digital operation interface, integrating multiple safety and convenient functions such as high-sensitivity automatic balancing, electric safety door lock, and real-time operation status monitoring. It can perfectly adapt to the needs of key pre-processing steps such as DNA extraction and purification, serological inspection, poison instrument analysis, and trace evidence enrichment in criminal technology laboratories, providing a stable, reliable and repeatable operation platform for the standardized processing of involved evidence. It is a necessary basic equipment to ensure the accuracy of subsequent test results, the standardization of experimental processes, and the judicial validity of identification results in criminal technology laboratories.
Technical Principle
The core of the equipment works based on the centrifugal sedimentation separation principle. The speed control accuracy, centrifugal force stability and automatic balance compensation ability of the equipment are the core basis to ensure the separation effect of involved biological evidence, sample integrity and accuracy of subsequent test results, and also the key premise to ensure the compliance and traceability of the judicial authentication process.
The equipment drives the centrifugal rotor to rotate at high speed and stably through a high-performance brushless motor, generating a strong and uniform centrifugal force field in the closed centrifugal chamber. In the sample tube placed in the rotor adapter, components with different densities and masses, including cell debris, proteins, nucleic acid solutions, blood cells, and supernatant, will move directionally to the bottom of the centrifuge tube at different sedimentation rates under the action of the centrifugal force field, so as to realize the efficient separation of solid particles and liquid, or the clear layering of liquid components with different densities, and complete the enrichment of target components and impurity removal of the involved biological evidence.
The equipment has a built-in industrial-grade high-sensitivity automatic balancing system, which can detect the balance state of the rotor during operation in real time, and automatically compensate for the slight mass difference between the symmetrically placed sample tubes. It can ensure the stability of the rotor during high-speed operation without accurate manual balancing by the operator, effectively avoiding severe vibration, operating noise, equipment damage, even sample overturn and loss caused by sample imbalance. It is especially suitable for the processing needs of precious, trace and non-reproducible involved biological evidence in criminal technology laboratories, ensuring sample safety and stable equipment operation throughout the process.
Core Functions and Compliance Practical Value
Intelligent Digital Display Control System, Ensuring Standardization and Traceability of Evidence Processing
The equipment adopts a full-touch digital control panel, which can accurately set and display the set speed, real-time operating speed, remaining operating time and other core parameters in real time and clearly. The operation process is intuitive and simple, the parameter setting accuracy is high, no complex manual debugging is required, which greatly reduces the training threshold for operators. The single-chip microcomputer intelligent control system can ensure that the parameters such as speed and time of each operation are completely consistent, realizing the standardized and repeatable operation of the whole process of involved evidence processing, fully complying with the core requirements of judicial authentication institutions for traceable and reviewable evidence processing processes, effectively avoiding the deviation of test results caused by manual operation errors, ensuring the standardized and unified processing process of each involved evidence, and ensuring the judicial validity of identification results.
High-Sensitivity Automatic Balancing System, Fully Protecting Precious Trace Forensic Evidence
The equipment has a built-in industrial-grade high-sensitivity automatic balancing system, which can effectively compensate for the slight mass difference between symmetrically placed sample tubes, and can achieve stable operation without accurate manual balancing, completely solving the operation pain point of traditional centrifuges that require accurate manual balancing, greatly improving the efficiency of evidence processing, and avoiding the risk of sample vibration and overturn caused by balancing errors. For the precious and non-reproducible involved evidence such as trace blood stains, semen stains, saliva stains, contact exfoliated cells common in criminal technology laboratories, it can ensure the stable operation of the sample tube during the centrifugal separation and enrichment process, avoid sample loss and cross-contamination, maximize the retention of effective detection components in the evidence, improve the success rate of inspection of trace evidence, and provide more key evidence clues for case investigation.
Multiple Safety Protection Designs, Complying with Laboratory Biosafety Management Specifications
The equipment is equipped with an industrial-grade electric safety door lock device. The door cover is automatically locked during the operation of the equipment and cannot be opened manually, which effectively prevents safety accidents such as biological sample splashing and personal injury caused by accidental opening of the cover during high-speed rotation. After the equipment stops and the rotor stops completely, the door cover is automatically unlocked, which greatly improves the safety and convenience of operation. The whole machine adopts a compact silent design, with low noise and small vibration during operation, and can be directly placed in the ultra-clean workbench or biological safety cabinet, which perfectly adapts to the use requirements of biosafety level 2 laboratories, effectively avoiding the laboratory biosafety risk caused by the spread of pathogenic microorganisms in the involved biological evidence, fully complying with the relevant management regulations of the General Requirements for Laboratory Biosafety, and fully ensuring the occupational health of laboratory operators and laboratory biosafety.
Multi-Specification Flexible Capacity Adaptation, Meeting the Diversified Evidence Processing Needs of Criminal Laboratories
The equipment is equipped with a variety of standardized rotor adapters, which are fully compatible with various specifications of laboratory common centrifuge tubes, including the adaptation specifications of 15ml centrifuge tubes × 8 holes, 10ml centrifuge tubes × 8 holes, and 5ml centrifuge tubes × 12 holes. The corresponding rotor adapters can be flexibly replaced according to the volume and type of the involved evidence, to meet the separation and processing needs of samples with different volumes and types. Whether it is bulk blood and tissue evidence in homicide and sexual assault cases, or trace contact biological evidence washing liquid in theft and robbery cases, it can achieve efficient separation and enrichment processing, perfectly adapting to the diverse evidence types and processing processes of criminal technology laboratories. One equipment can cover most of the low-speed centrifugal pre-processing needs of the laboratory, improving the utilization rate of laboratory equipment and the efficiency of evidence processing.
Practical Application Scenarios Within the Scope of Statutory Authorization
All application scenarios of this equipment strictly abide by the relevant national laws and regulations and criminal technical inspection specifications, and can only be operated in a standardized manner by professionally trained personnel in laboratories with statutory qualifications. The core compliant application scenarios include four categories:
Pre-Processing of Biological Samples for Forensic DNA Inspection
As a necessary basic equipment for forensic DNA laboratories, it is mainly used for the pre-processing of involved biological evidence in criminal cases such as homicide, sexual assault and injury, including separating serum and blood cells from whole blood samples, separating epithelial cells and sperm cells from the leachate of body fluid stains such as saliva stains and semen stains, separating cell debris and nucleic acid supernatant from tissue lysate, providing qualified pre-processed samples for subsequent DNA extraction, purification, amplification and typing inspection, effectively removing the interference of impurities on DNA test results, improving the success rate of DNA inspection of trace evidence, and providing a scientific basis for individual identification and suspect locking in cases.
Purification and Preparation of Evidence for Forensic Toxic and Drug Analysis
In the toxic and drug analysis work of poisoning, drug use, drug overdose death cases, it is used for the centrifugal pre-processing of involved biological evidence such as blood, urine, gastric contents, tissue homogenate, etc. The particle impurities, precipitated proteins, tissue residues and other interfering components in the evidence are removed by centrifugal separation to obtain a clear supernatant, which provides purified samples for subsequent instrumental analysis such as gas chromatography-mass spectrometry (GC-MS) and liquid chromatography-mass spectrometry (LC-MS), effectively removing matrix interference, improving the accuracy and sensitivity of qualitative and quantitative analysis results of toxic and drugs, and providing a scientific identification basis for the characterization of poisoning cases, the identification of drug use behavior, and the inference of cause of death.
Enrichment and Concentration Processing of Trace Biological Evidence at the Scene
Aiming at the trace biological evidence extracted from the scene of contact crime cases such as theft and robbery, including contact exfoliated cells on the carrier such as crime tools, door and window handles, beverage bottles, cigarette butts, as well as the washing liquid of trace blood stains and body fluid stains left at the scene, the target cells and biological components are enriched and concentrated by high-speed centrifugation, so that the trace biological components with extremely low original content and cannot be directly detected are enriched to the bottom of the centrifuge tube, greatly improving the concentration of target components, improving the sensitivity of subsequent DNA inspection and biological component detection, providing basic support for the successful inspection of difficult trace evidence, and providing key clues for case detection.
Routine Experimental Auxiliary Operations in Criminal Technology Laboratories
It can be widely used in various routine experimental auxiliary operations in criminal technology laboratories, including rapid mixing and layering of laboratory mixed reagents, short-time centrifugation of products after PCR amplification, collection of liquid droplets on the tube wall, centrifugal separation after antibody-antigen reaction, separation and collection of trace precipitates, etc. It adapts to the experimental operation needs of multiple majors such as forensic serological inspection, trace evidence analysis, and document inspection, and is the most versatile basic pre-processing equipment in criminal technology laboratories.
Core Technical Parameters
The maximum speed of the equipment is 4000 rpm, adopting single-chip microcomputer intelligent control mode, equipped with a full-touch digital display operation panel. The core functions include automatic sample balancing, electric safety door lock during operation, and continuous adjustment of speed and operation time. It belongs to a desktop low-speed automatic balancing centrifuge. The equipment rotor is equipped with a variety of standard adapters, among which adapter 1 is compatible with 15ml centrifuge tubes with a maximum capacity of 8 holes; adapter 2 is compatible with 10ml centrifuge tubes with a maximum capacity of 8 holes; adapter 3 is compatible with 5ml centrifuge tubes with a maximum capacity of 12 holes, which can be flexibly replaced and adapted according to sample processing needs.
Compliance Practical Application Cases
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The Criminal Technology Detachment of the Municipal Public Security Bureau accepted a vicious sexual assault case. After the victim reported the case, the forensic doctor extracted a number of suspicious semen stain evidence from the victim and the crime scene, as well as contact physical evidence such as cigarette butts and beverage bottles left by the suspect. All the evidence was trace biological evidence with extremely low effective component content, which had extremely high requirements for the pre-processing process. The laboratory inspectors used this Desktop Automatic Balancing Low-Speed Centrifuge to carry out centrifugal enrichment treatment on the semen stain leachate and saliva stain washing liquid. By setting the standardized speed and centrifugation time, they successfully enriched the suspect's sperm cells and oral epithelial cells, effectively removed the carrier impurities and interfering components in the evidence, and provided qualified pre-processed samples for subsequent DNA extraction and purification.
Finally, the inspectors successfully obtained the complete STR typing map of the suspect from multiple trace evidence samples. After entering it into the national forensic DNA database, they successfully matched the suspect Liu, who had a previous criminal record, which provided decisive scientific evidence for the rapid detection of the case. The stable centrifugal separation effect and trace sample enrichment capacity of this equipment provided key basic support for the successful inspection of the difficult trace evidence in this case.
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A suspected poisoning death case occurred in a certain city. The family members of the deceased had objections to the cause of death and reported to the police to ask the public security organ to find out the cause of death. The forensic doctor carried out an autopsy on the deceased, extracted biological evidence such as the deceased's blood, urine, gastric contents, and liver tissue, and entrusted the criminal technology laboratory to carry out toxic and drug analysis. Because the evidence contains a large number of matrix interference components such as tissue residues and protein precipitates, direct instrumental analysis will seriously affect the accuracy of the test results. The inspectors used this Desktop Automatic Balancing Low-Speed Centrifuge to carry out batch centrifugal pre-processing on different types of evidence. Through centrifugal separation, the solid impurities and precipitated proteins in the evidence were removed, and a clear supernatant was obtained. After pre-processing, gas chromatography-mass spectrometry analysis was carried out.
Finally, the inspectors successfully detected the highly toxic rodenticide component in the blood and gastric contents of the deceased, and clarified that the deceased died of tetramine poisoning, which provided a key scientific basis for the characterization of the case and the direction of investigation. Subsequent investigators successfully arrested the poisoning suspect according to the test results and cracked the poisoning homicide case.