• Fan system: long-life, low-noise, maintenance-free centrifugal fan is adopted to ensure stable operation for a long time and reduce noise interference.

• Double-layer negative pressure structure: the unique double-layer design effectively prevents gas leakage and ensures the safety of the operating environment.

• Uniform air distribution performance: Through the well-designed air supply system, it realizes the uniform distribution of air in the whole working area to meet the requirement of high cleanliness.

• Air speed adjustment: Provide automatic constant or graded adjustment of air speed to meet different experimental requirements.

• Liquid tank sealing design: The liquid tank design ensures perfect sealing effect to prevent any possible contamination.

• Integration of internal and external structure: The consistent design of internal and external structure of the equipment ensures neatness without dead corners, which is easy to clean and maintain.

• Wind speed frequency conversion system: The manual frequency conversion system keeps the wind speed in the main working area in a uniform operation state, which improves the weighing accuracy.

• Filter differential pressure display device: real-time monitoring of filter operating conditions to ensure filtration efficiency.

• Unique air duct design: optimize the air duct design, effectively control the working noise of the whole machine and provide a quiet experimental environment.

• Even flow design: when weighing and dispensing dust and reagents in the working area, it can control the spillage and uplift of dust and reagents to prevent inhalation hazards to human beings and avoid cross-contamination.

• Chamber Material

Neg Furls negative pressure weighing chambers are usually made of SUS304 stainless steel, which has good corrosion, abrasion and high temperature resistance, is easy to clean and maintain, and meets the requirements of GMP standards for equipment materials.

• Filtration System

Neg Furls negative pressure weighing chamber is equipped with a high efficiency filtration system, including primary filters and high efficiency filters, which can effectively remove large particles and fine particles in the air to ensure the cleanliness of the air. HEPA filters are typically class H14 or better and are capable of filtering out at least 99.99% of particles larger than 0.3μm.

• Control Systems

Neg Furls negative pressure weighing chambers have an advanced control system that supports both manual and automatic control modes. Some models are equipped with touch screen and PLC control system, which is easy and intuitive to operate, and can realize the automatic adjustment and monitoring of air speed to ensure the cleanliness and negative pressure requirements of the working area.

• Lighting and Sterilization

Neg Furls negative pressure weighing rooms are equipped with internal lighting to ensure sufficient light intensity, usually more than 300 Lux at one meter above the floor level, and sterilization equipment, such as UV germicidal lamps or ozone generators, to kill airborne bacteria and viruses and to ensure a hygienic and safe operating environment.

Neg Furls negative pressure weighing chambers have a range of other features, such as adjustable air speed and volume, and sensors to monitor differential pressure, air speed and temperature and humidity. These devices help the operator to monitor the operating status of the weighing chamber in real time and make the necessary adjustments to maintain optimum performance.

The working principle of the negative pressure weighing chamber is based on a form of vertical unidirectional airflow through a series of filtration systems, including primary, intermediate and high efficiency filters. The air is circulated within the working area and partially discharged to nearby areas, creating a negative pressure environment and effectively preventing cross contamination.

Options. 

1	Wind Speed Sensor
2	Differential Pressure Sensor
3	converter
4	touchscreens
5	PLC control
6	Polymer homogeneous membrane