Overview
The electronic overhead dispenser is a sophisticated liquid handling instrument designed for laboratories and industrial applications. It combines precision engineering with user-friendly electronic controls to deliver accurate and reproducible liquid transfers. These devices are particularly valuable in environments where manual pipetting would be impractical or where contamination risks must be minimized. Modern units feature programmable settings, allowing operators to store frequently used protocols for improved workflow efficiency.
Structure and Working Principle
The dispenser typically consists of a motorized piston mechanism, a digital control unit, and a dispensing arm that can be positioned over containers. The system uses positive displacement technology to ensure accurate liquid measurement. Advanced models incorporate touchscreen interfaces for easy programming of volume parameters and dispensing sequences. The working principle involves creating a precise vacuum to draw liquid into the system, followed by controlled expulsion through the dispensing tip.
Key Features
Modern electronic overhead dispensers offer multiple programmable modes, including single-dose dispensing, repetitive dispensing, and dilution protocols. Many models feature memory functions to store frequently used protocols. Additional features may include automatic tip ejection, liquid level detection, and connectivity options for integration with laboratory information systems. The best units provide accuracy within ±0.5% and precision better than 0.2% CV.
Application Areas
These instruments are essential in pharmaceutical quality control labs, where precise reagent addition is critical. They're equally valuable in research laboratories for preparing standard solutions and culture media. Industrial applications include food and beverage production for flavoring additions, and chemical manufacturing for catalyst dispensing. The ability to handle corrosive or viscous liquids makes them versatile across many sectors.
Maintenance and Precautions
Regular calibration using certified reference weights is essential to maintain accuracy. The dispensing tips should be inspected for wear and replaced periodically. For optimal performance, the instrument should be cleaned according to manufacturer recommendations, especially when changing between different liquids. Special care should be taken when handling volatile or hazardous chemicals to prevent damage to electronic components.
B2B Procurement Guide
When procuring electronic overhead dispensers in bulk, verify the manufacturer's calibration certification and after-sales support capabilities. Consider total cost of ownership, including maintenance requirements. For specialized applications, inquire about custom programming options or specialized dispensing tips. Bulk purchases typically offer 10-20% cost savings, with lead times varying from 4-8 weeks depending on configuration complexity.
Related Manufacturers
- 主营：培养箱、试验箱、离子计、电子顶置分液器、测定仪、pxbj-287l、前置usb、超纯水、酸度计、实验室、gb10592-89、wp-rol-45sj、wp-ro-40bsj、gdwj-050asj、丁腈手套、恒温鼓风、电热恒温、苏净安泰、压力蒸汽、管道净气、仪电科学、恒温恒湿、盒装吸头、滤芯吸头、干燥箱、安全柜
- 主营：油料电导率仪、油品电导率分析仪、汽油电导率仪、毛细管清洗器、航空煤油电导率仪、液压油电导率仪、轻质油品电导率分析仪、毁形机、二氧化碳收集测定仪、颗粒强度测定仪、点腐蚀测深仪、混凝土热物理参数仪、多参数水质分析仪、鼓风干燥箱、玻璃表面应力仪、冷原子吸收测汞仪、啤酒浊度泡沫检测仪、湿式气体流量计、毛氏脂肪离心机、紫外辐照计、有效氯测试仪、特斯拉计、匀胶机、紫外臭氧清洗机
- 主营：染色液、乙氨酸、噻唑兰、喷雾剂、封片剂、清除剂、试剂盒、研试剂、转膜液、dpph试剂、page凝胶、te缓冲液、pbs缓冲液、检测溶液、核酸染料、中性树胶、胰蛋白酶、纤维素酶、染色试剂、mes缓冲液、faa固定液、甲苯胺蓝、生化试剂、实验试剂、ctab抽提液
- 主营：实验试剂、标准溶液、显色试剂盒
- 主营：自动颗粒强度测定仪、冷原子吸收测汞仪、海水比色计、电子顶置分液器、匀胶机、油料电导率仪
- 主营：能量计、紫外辐照计、在线浊度仪、溶解氧测定仪、可见光吸收法、核辐射检测仪、管道粉尘检测仪
- 主营：离心机、酸度计、糖度计、移液器、分液器、灭菌器、振荡器、搅拌器、制冰机、折射仪、清洗机、层析冷柜、冻干机、水浴锅、蠕动泵、恒流泵、培养箱、摇床、色差仪、折射计、测糖仪、天平
- 主营：厚度计、测试夹、扫地机、减压器、分析仪、防护服、监测仪、风速计、贴纸板、报警仪、振动仪、火狐狸、固化灯、测量仪、温控仪、温湿度、水分仪、欧米茄、安全帽、数粒仪、qbj数显、工具袋、观片灯、产尘仪、全金属
- 主营：紫外线灯、破碎仪、混匀仪、实验室仪器、磁力搅拌器、无损检测仪、环境测量仪、水质检测仪、分子杂交箱、涂层测厚仪、频闪仪
- 主营：测试计、张力计、风速计、减压器、校准器、探测器、剂量计、报警仪、交联仪、洗砂机、测量仪、看谱镜、测定仪、测力仪、辐射仪、露点仪、滚瓶机、紫外灯、流量计、硬度计、测试仪、振动计、恒流阀、离心机、剂量仪
- 主营：分液漏斗垂直振荡器、高低温循环装置、冷冻干燥机、光催化反应装置
- 主营：叶片分离器、多管旋风分离器、伞型叶片分离器、组合式分离过滤器、气液分离器、分离器入口装置、叶片式气液分离器
- 主营：电池研发实验设备、锂电中、小试线方案、超电容电池设备、注液器厂家、涂布设备、焊接设备、手套箱净化系统等
- 主营：超声波流量计、在线COD氨氮总磷总氮测试仪、水质分析仪、水质检测仪器、水质采样器、多普勒流量计、多参数水质检测仪、水深探测仪、水质流速仪、手持式电波流速仪
- 主营：离心机、天平、金属浴、移液器、搅拌器、显微镜、摇床、培养箱、定氮仪、分光光度计、基因导入仪、旋转蒸发仪、基因扩增仪、水浴锅、氮吹仪、加热板、超声波破碎、浓缩仪、气相色谱仪、冷冻干燥机、蛋白检测仪、蛋白纯化仪、荧光计、静电纺丝机
- 主营：制冰机、铝排管、大中型冷库、建材家装分液器、8角速冻搁架、方管速冻搁架
- 主营：低温恒温槽、实验室离心机、冷冻离心机、摇床振荡器、喷雾干燥机、氮吹仪、一体化蒸馏仪、培养箱、干燥箱、分子蒸馏仪、试验箱