法医实验室高精度微量可调移液器——耐腐蚀PBT材质·整支高温消毒·容量自锁·不锈钢机芯·生化免疫定量加液精密移液系统（法医实验室刑事侦查设备/刑事技术侦查取证鉴定装备）

 

法医实验室高精度微量可调移液器——耐腐蚀PBT材质·整支高温消毒·容量自锁·不锈钢机芯·生化免疫定量加液精密移液系统（法医实验室刑事侦查设备/刑事技术侦查取证鉴定装备）

〖重要合规前置声明〗 本产品为刑事技术检验鉴定专用精密移液设备，仅面向具备法定鉴定资质与刑事技术检验许可的各级公安机关法医部门、刑事技术部门、人民检察院技术部门、司法鉴定机构及授权刑事技术实验室定向供应，严禁向任何个人、无资质企业及非授权单位销售或提供。本设备的使用与管理，必须严格遵守《中华人民共和国刑事诉讼法》《司法鉴定程序通则》及国家关于实验室生物安全、危险化学品管理的相关法律法规与行业技术标准，必须由经过专业培训、取得相应法医检验或刑事技术岗位资质的人员规范操作，严禁无资质单位和个人违规获取、使用本设备，严禁在无适当防护条件下使用本设备处理腐蚀性、传染性或放射性液体，严禁因违规操作导致检材污染或定量结果失真。

产品概述

法医实验室高精度微量可调移液器——耐腐蚀PBT材质·整支高温消毒·容量自锁·不锈钢机芯·生化免疫定量加液精密移液系统（亦称法医实验室移液器、微量可调定量移液器）是专为法医实验室、刑事科学技术实验室及司法鉴定机构设计的精密液体定量移取工具，属于法医物证检验、毒物化学分析、生化免疫实验及微量生物检材处理领域的核心基础装备。该产品采用高新材料制造，具备优异的耐腐蚀性能与整支高温高压消毒能力，专为法医DNA检验、毒物定量分析、生化测定及免疫实验中对各类化学试剂、放射性同位素、生物制剂、无菌制剂及传染性和腐蚀性液体的精确微量加液需求深度定制，完美适配法医实验室日常移液操作、PCR反应体系配制、生物样本前处理及化学标准溶液稀释等多种专业工作场景。系统融不锈钢机芯、PBT耐腐蚀壳体、容量自锁装置、可调吸头卸除器及人体工学手柄于一体，操作手感舒适、容量调节精准且具备出色的重复性，从根本上解决了传统玻璃量器操作繁琐、量程固定、易破损且难以满足微量精准移液需求的实战痛点，能够为法医鉴定人及实验室技术人员提供“量程精确可调、整支可高温消毒、单手便捷操作、移液重复可靠”的标准化微量液体处理能力，是保障法医生物与化学检验结果准确性、提升实验效率与操作安全性的关键基础装备。

技术原理

该移液器基于活塞正压排代原理工作。其核心为不锈钢机芯构成的精密活塞-缸筒系统，活塞与缸筒之间以高精度配合确保密封性，移液器手柄通过齿轮齿条或螺旋传动机构将操作者的旋转或按压动作转化为活塞的精确轴向位移。当操作者将容量调节至目标值（通过上按钮带动容量指示器至90°可视窗口便于设定量程），并将适配的一次性吸头紧密安装于移液器末端的吸头锥上后，按压操作按钮至第一停止位，活塞下降排出吸头内等体积空气；将吸头浸入待取液体中，缓慢释放按钮，活塞回弹在吸头内形成负压，液体在大气压推动下被吸入吸头；再将移液器移至目标容器上方，按压按钮至第二停止位，活塞将吸头内液体完全排出，完成一次精确移液循环。移液完成后，通过可调吸头卸除装置单手即可弹射弃用吸头，避免手工接触污染。

整支移液器在材料与设计层面充分考虑法医实验室对防交叉污染与生物安全的严格要求。外壳与手柄采用PBT（聚对苯二甲酸丁二醇酯）高新材料，该材料具有优秀的耐化学腐蚀性，可抵抗法医实验室中常用的有机溶剂、酸碱试剂及氧化剂的侵蚀，且可耐受紫外线照射消毒及121℃整支高温高压蒸汽灭菌，确保在不同实验阶段之间的彻底去污。容量调节机构配备自锁功能，设定量程后自动锁定，防止操作过程中误触旋钮造成容量偏差，保证批次内加液操作的精度一致性。随机配备专用工具、润滑油及备用密封环，便于实验室按需进行快速校准与日常维护，确保设备长期处于精密可靠状态。

核心功能与合规实战价值

高新材料耐腐蚀壳体与整支高温消毒能力，实现法医实验室生物安全与防交叉污染的闭环保障
设备外壳及手柄采用PBT高级工程塑料一体成型，具备优异的耐酸碱、耐有机溶剂及抗氧化性能，在接触常见法医化学试剂及生物体液后不发生表面腐蚀或材质降解。整支移液器可在121℃高温高压蒸汽条件下进行彻底灭菌，同时支持紫外线照射快速消毒，完全满足法医DNA实验室及微生物检验室对耗材级器具“一用一灭菌”或“批次间严格灭菌”的生物安全管理要求，有效规避因移液器清洁不彻底导致的PCR扩增污染、微生物培养交叉干扰或毒物分析空白干扰等严重影响检验结论可靠性的实验风险。

不锈钢机芯与容量自锁精密调节机构，支撑微量加液的高精度与高重复性
设备核心计量部件采用不锈钢机芯与精密加工活塞-缸筒配对系统，配合容量调节机构的自锁功能，操作者通过上按钮设定目标容量后量程自动锁定，在连续移液过程中不会因手指误触或振动而发生容量漂移，确保批次内多次加液的体积一致性。该精密移液性能使法医检验人员在配制毒物标准曲线浓度梯度、分装DNA模板及加入PCR反应混合液等关键实验步骤中能够以极高的体积重复性完成微量液体转移，从加样环节消除因体积误差导致的定量结果偏差，满足司法鉴定实验室对定量检验方法精密度的质量控制指标。

人体工学手柄与便捷操作设计，提升高频率移液操作的工作效率与职业健康体验
整支移液器依据人体动力学设计原理进行外形优化，手柄轮廓贴合操作者手掌曲面，按压按钮力值适中且行程清晰，长时间连续移液作业不易导致手部肌肉疲劳或重复性劳损。可调吸头卸除装置兼容各类品牌一次性吸头，移液完成后只需手指轻按退尖器即可自动弹射弃用吸头，全程无需手工触碰吸头尖端，显著降低了操作者与生物危险物质或化学试剂接触的职业暴露风险。独特挂件设计使移液器在不使用时可以悬挂存放于实验台架侧面或挂钩上，不占用有限的实验台面操作空间，优化了法医实验室通常检材多、设备密集的工作环境。

合规应用场景

法医DNA检验中PCR反应体系的精确配制场景
在法医DNA实验室进行STR分型检验时，检验人员需将微量DNA模板、引物、聚合酶及反应缓冲液按严格比例混合配制PCR扩增体系。使用本移液器在不同反应管之间精确加注各组分溶液，容量自锁确保连续分液体积一致，有助于保障不同样本的扩增效率与峰高均衡性，从而获得符合DNA检验技术规范要求的可靠分型图谱。

毒物化学分析中标准溶液配制与检材稀释场景
在法医毒物化学检验中，检验人员需使用本移液器精确量取并逐级稀释毒物标准品储备液，配制浓度梯度标准系列，同时对待检血液、尿液等生物检材进行定量取样与前处理试剂添加。移液器的高重复性与耐腐蚀性确保在有机溶剂、强酸强碱试剂反复接触条件下性能稳定，为色谱定量分析提供可靠的样品制备保障。

生化免疫实验中微量液体转移场景
在法医生化测定及免疫学实验（如毒品免疫层析初筛、血液生化指标检测）中，检验人员使用本移液器对血清、酶液、显色底物等微量生化试剂进行精准加液与混合。整支可消毒特性保障了不同案件检材之间无交叉污染，支持了检验结论的客观性与法制化要求。

核心技术参数

材质方面，设备机芯及退尖器采用不锈钢材料，外壳及手柄为PBT高级工程塑料，具有高耐腐蚀性、耐高温性及抗紫外线性能。消毒方式支持紫外线照射消毒及整支121℃高温高压蒸汽灭菌。容量调节方面，采用上按钮调节方式并配备90°可视窗口便于设定量程，具备容量自锁功能防止误动。操作方面，符合人体动力学设计，配备可调吸头卸除装置，适配各类一次性吸头。维护方面，随机附赠专用校准工具、润滑油及密封环，便于日常校准与维护。适用领域覆盖医药卫生、化工科研、高等院校、生命科学研究及法医实验室中的生化测定、免疫实验、化学分析及各类化学试剂、放射性同位素、生物制剂、传染性和腐蚀性液体的定量加液操作。

合规实战应用案例

某市公安法医DNA实验室在开展一批涉嫌故意伤害案件生物检材的STR分型检验中，检验人员使用本移液器对全部案件样本及阳性/阴性对照进行PCR反应体系的配制。由于案件检材数量多、加液步骤频繁，移液器的容量自锁与均一按压手感在连续操作中保证了每份反应体系的组分体积准确一致，最终全部样本获得清晰完整的DNA分型图谱，阴性与阳性对照结果符合预期。检验完成后，检验人员将移液器整支进行121℃高温高压灭菌，确保下批次无关案件的检材处理在零交叉污染条件下进行，实验室内部质量审查对移液器清洁消毒记录的完整性给予了认可。

某省司法鉴定中心毒物化学实验室在受理一起疑似农药中毒死亡案件的检验委托时，需对死者血液中的有机磷农药残留进行定量分析。检验人员使用本移液器精确吸取血液样本并加入有机溶剂进行液-液萃取，随后配制一系列浓度梯度的农药标准溶液建立校准曲线。移液器在连续接触丙酮、二氯甲烷等有机溶剂的情况下，未发生材质腐蚀或量程漂移，标准曲线线性相关系数达到0.999以上，盲样加标回收率在95%至105%之间，完全满足法庭毒物分析对定量结果准确性与精密度的技术要求。

厂家信息：北京毕思特联合科技有限公司
网址：https://www.bestlh.com
地址：北京市亦庄开发区经海六路一号院尖子班 C9 独栋
电话：010-56526048

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Forensic Laboratory High-Precision Micro-Adjustable Pipette — Corrosion-Resistant PBT Material · Whole-Pipette Autoclavable · Volume Locking · Stainless Steel Mechanism · Precise Liquid Dispensing System for Biochemistry, Immunology & Quantitative Analysis (Forensic Laboratory Criminal Investigation Equipment / Criminal Technical Investigation and Forensic Identification Equipment)

Global site URL：https://xilankeji.en.alibaba.com

〖Important Compliance Precaution〗 This product is a specialized precision pipetting equipment for criminal technical forensic examination, which is solely supplied to authorized entities such as forensic medicine departments and criminal technical departments of public security organs, technical departments of people's procuratorates, forensic identification institutions, and authorized criminal technical laboratories with statutory identification qualifications and criminal technical examination permits. Any sale or supply to individuals, non-qualified enterprises and unauthorized units is strictly prohibited. The use and management of this equipment must strictly comply with the Criminal Procedure Law of the People's Republic of China, the General Rules for Judicial Authentication Procedures, and national laws, regulations and industrial technical standards regarding laboratory biosafety and hazardous chemical management. Operation must be carried out exclusively by professionally trained personnel holding corresponding forensic examination or criminal technical post qualifications. Unauthorized units and individuals are strictly forbidden from acquiring or using this equipment. Using this equipment to handle corrosive, infectious, or radioactive liquids without appropriate protective measures, or any contamination of evidence samples or distortion of quantitative results caused by improper operation, is strictly prohibited.

Product Overview

The Forensic Laboratory High-Precision Micro-Adjustable Pipette — Corrosion-Resistant PBT Material, Whole-Pipette Autoclavable, Volume Locking, Stainless Steel Mechanism, Precise Liquid Dispensing System for Biochemistry, Immunology & Quantitative Analysis (also referred to as the Forensic Laboratory Pipette or Micro-Adjustable Quantitative Pipette) is a precision liquid metering and transfer tool specifically designed for forensic laboratories, criminal technical science laboratories, and forensic identification institutions. It constitutes a core foundational piece of equipment in the fields of forensic biological evidence examination, toxicological chemical analysis, biochemical and immunological testing, and trace biological sample processing. This product is manufactured using advanced high-tech materials, offering excellent corrosion resistance and the ability to be autoclaved in its entirety. It is deeply customized for the precise micro-volume liquid handling requirements of various chemical reagents, radioisotopes, biological agents, sterile preparations, and infectious and corrosive liquids in forensic DNA testing, toxicant quantitative analysis, biochemical assays, and immunological experiments. It perfectly adapts to a variety of professional work scenarios, including routine pipetting operations in forensic laboratories, the preparation of PCR reaction mixtures, the pre-processing of biological samples, and the dilution of chemical standard solutions. The system integrates a stainless steel mechanism, a corrosion-resistant PBT housing, a volume locking device, an adjustable tip ejector, and an ergonomic handle into a single unit. It offers a comfortable operating feel, precise volume adjustment, and outstanding reproducibility. This fundamentally resolves the operational pain points of traditional glass graduated pipettes, which are cumbersome to use, have a limited fixed volume range, are fragile, and struggle to meet the demands of precise micro-volume pipetting. It provides forensic examiners and laboratory technicians with "precisely adjustable volume, fully autoclavable, convenient one-handed operation, and reliably repeatable pipetting" standardized micro-liquid handling capability. It is a key foundational piece of equipment for ensuring the accuracy of forensic biological and chemical examination results and for enhancing experimental efficiency and operational safety.

Technical Principle

This pipette operates on the principle of piston-driven positive displacement. Its core consists of a precision piston-cylinder system formed by a stainless steel mechanism. The piston and cylinder are fitted with high precision to ensure airtightness. The pipette handle converts the operator's rotational or pressing action into precise axial displacement of the piston through a rack-and-pinion or screw-driven transmission mechanism. Once the operator adjusts the volume to the target value (using the top button to drive the volume indicator to the 90° visible window for easy volume setting) and securely fits a compatible disposable tip onto the tip cone at the end of the pipette, the operating button is pressed to the first stop. The piston descends, expelling an equivalent volume of air from the tip. The tip is then immersed in the liquid to be aspirated. The button is slowly released, the piston rebounds, creating a negative pressure inside the tip, and the liquid is drawn into the tip under atmospheric pressure. The pipette is then moved over the target container, and the button is pressed to the second stop. The piston completely expels the liquid from the tip, completing one precise pipetting cycle. After pipetting is complete, the disposable tip can be ejected with one hand using the adjustable tip ejector, avoiding manual contact and contamination.

The material and design of the entire pipette fully address the stringent requirements of forensic laboratories for prevention of cross-contamination and biosafety. The outer housing and handle are made of advanced PBT (Polybutylene Terephthalate) high-tech material. This material possesses excellent chemical corrosion resistance, able to withstand attack from organic solvents, acid-base reagents, and oxidizing agents commonly used in forensic laboratories. It can also withstand ultraviolet light disinfection and autoclaving at 121°C in its entirety, ensuring thorough decontamination between different experimental stages. The volume adjustment mechanism is equipped with a self-locking function, automatically locking the set volume to prevent accidental knob displacement during operation and ensuring the precision consistency of the dispensed volumes within a batch. The supplied dedicated tools, lubricant, and spare sealing rings facilitate convenient and rapid calibration and routine maintenance by the laboratory as needed, ensuring the equipment remains in a precise and reliable state over the long term.

Core Functions and Compliance Operational Value

Corrosion-Resistant High-Tech Material Housing and Whole-Pipette Autoclavability, Achieving Closed-Loop Biosafety and Cross-Contamination Prevention Assurance for Forensic Laboratories
The outer housing and handle of the device are integrally molded from advanced PBT engineering plastic, possessing excellent resistance to acids, alkalis, organic solvents, and oxidation. No surface corrosion or material degradation occurs after contact with common forensic chemical reagents and biological fluids. The entire pipette can undergo thorough sterilization under 121°C high-temperature and high-pressure steam conditions, and also supports rapid disinfection via ultraviolet light irradiation. This fully meets the biosafety management requirements of forensic DNA laboratories and microbiological testing rooms for "single-use sterilization" or "strict sterilization between batches" of consumable-grade instruments. It effectively circumvents experimental risks such as PCR amplification contamination, cross-interference in microbial cultures, or blank interference in toxicological analysis caused by inadequate pipette cleaning, which can seriously affect the reliability of examination conclusions.

Stainless Steel Mechanism and Volume Locking Precision Adjustment Mechanism, Supporting High Precision and High Repeatability in Micro-Volume Dispensing
The core metering component of the device employs a stainless steel mechanism and a precision-machined, paired piston-cylinder system. Combined with the self-locking function of the volume adjustment mechanism, the operator sets the target volume using the top button, and the volume is automatically locked, preventing volume drift due to accidental finger contact or vibration during continuous pipetting. This ensures the volumetric consistency of multiple dispenses within a batch. This precision pipetting performance enables forensic examiners to perform micro-volume liquid transfers with extremely high volumetric repeatability in critical experimental steps such as preparing concentration gradients for toxicant standard curves, aliquoting DNA templates, and adding PCR reaction master mixes. It eliminates quantitative result deviations caused by volumetric errors at the sample addition stage, meeting the quality control indicators of forensic identification laboratories for the precision of quantitative analytical methods.

Ergonomic Handle and Convenient Operational Design, Enhancing Work Efficiency and Occupational Well-Being During High-Frequency Pipetting
The shape of the entire pipette is optimized based on principles of ergonomic design. The handle contour conforms to the curvature of the operator's palm, the push-button force is moderate, and the stroke is clearly defined. Prolonged continuous pipetting operations are less likely to cause hand muscle fatigue or repetitive strain injuries. The adjustable tip ejector is compatible with various brands of disposable tips. After pipetting is complete, a light press of the tip ejector with the finger automatically ejects the used tip, requiring no manual contact with the tip point throughout the entire process. This significantly reduces the occupational exposure risk of the operator to biohazardous substances or chemical reagents. The unique hanging accessory design allows the pipette to be stored by hanging it on the side of a lab bench shelf or a hook when not in use, without occupying valuable operational space on the limited lab bench surface. This optimizes the typically dense and equipment-filled working environment of forensic laboratories.

Compliant Application Scenarios

Precise Preparation of PCR Reaction Mixtures for Forensic DNA Testing Scenario
During STR typing analysis in a forensic DNA laboratory, the examiner needs to precisely mix micro-volumes of DNA template, primers, polymerase, and reaction buffer according to strict proportions to prepare the PCR amplification mixture. This pipette is used to accurately dispense each component solution between different reaction tubes. The volume locking feature ensures consistent dispensing volumes across consecutive aliquots, contributing to balanced amplification efficiency and peak heights among different samples, thereby obtaining reliable typing profiles that meet the technical standards for DNA examination.

Preparation of Standard Solutions and Sample Dilution in Forensic Toxicological Chemical Analysis Scenario
In forensic toxicological chemical analysis, the examiner uses this pipette to accurately measure and serially dilute toxicant standard stock solutions to prepare a series of concentration gradient standards. Simultaneously, it is used for the quantitative sampling of biological evidence such as blood and urine and the addition of pre-processing reagents. The high repeatability and corrosion resistance of the pipette ensure stable performance under repeated contact with organic solvents, strong acids, and strong alkalis, providing reliable sample preparation assurance for chromatographic quantitative analysis.

Micro-Volume Liquid Transfer in Biochemical and Immunological Experiments Scenario
In forensic biochemical assays and immunological experiments (such as drug immunochromatographic screening and blood biochemical marker analysis), the examiner uses this pipette to perform precise dispensing and mixing of micro-volume biochemical reagents such as serum, enzyme solutions, and chromogenic substrates. The whole-pipette autoclavability ensures no cross-contamination between samples from different cases, supporting the objectivity of the examination conclusions and meeting the requirements for legal standardization.

Core Technical Parameters

In terms of materials, the device's mechanism and tip ejector are made of stainless steel. The outer housing and handle are made of advanced PBT engineering plastic, featuring high corrosion resistance, high-temperature resistance, and ultraviolet resistance. For sterilization methods, it supports ultraviolet light disinfection and autoclaving of the entire pipette at 121°C. Regarding volume adjustment, a top button adjustment method is used, equipped with a 90° visible window for easy volume setting, and features a volume self-locking function to prevent accidental displacement. For operation, it conforms to ergonomic design principles, is equipped with an adjustable tip ejector, and is compatible with various types of disposable tips. For maintenance, it is supplied with dedicated calibration tools, lubricant, and a sealing ring to facilitate routine calibration and maintenance. The applicable fields cover medicine and health, chemical research, higher education institutions, life science research, and forensic laboratories, for tasks including biochemical assays, immunological experiments, chemical analysis, and the quantitative dispensing of various chemical reagents, radioisotopes, biological agents, infectious and corrosive liquids.

Compliant Field Application Cases

During the STR typing analysis of biological evidence from a batch of suspected intentional injury cases, the DNA laboratory of a municipal public security forensic center used this pipette to prepare the PCR reaction mixtures for all case samples, along with positive and negative controls. Due to the large number of case samples and frequent pipetting steps, the pipette's volume locking and consistent pressing feel ensured that the component volumes of each reaction mixture were accurate and consistent across continuous operations. Ultimately, all samples yielded clear and complete DNA typing profiles, and the results for the negative and positive controls met expectations. Upon completion of the testing, the examiner autoclaved the entire pipette at 121°C, ensuring that the processing of evidence for the next batch of unrelated cases was conducted under zero cross-contamination conditions. The laboratory's internal quality audit acknowledged the completeness of the pipette cleaning and disinfection records.

When accepting a commission to examine a suspected pesticide poisoning death case, the toxicology laboratory of a provincial judicial identification center needed to perform a quantitative analysis of organophosphorus pesticide residues in the deceased's blood. The examiner used this pipette to accurately aspirate blood samples and add organic solvents for liquid-liquid extraction. Subsequently, a series of pesticide standard solutions at varying concentrations was prepared to establish a calibration curve. Despite continuous contact with organic solvents such as acetone and dichloromethane, the pipette showed no material corrosion or volume drift. The linear correlation coefficient of the standard curve was above 0.999, and the spike recovery rate of the blind sample was between 95% and 105%, fully meeting the technical requirements of forensic toxicological analysis for the accuracy and precision of quantitative results.

Manufacturer Information: Beijing Best United Technology Co., Ltd.
Website: https://www.bestlh.com
Address: Building C9, Jianziban, No.1 Courtyard, Jinghai Sixth Road, Yizhuang Development Zone, Beijing
Tel: 010-56526048