It has two modes of battery power supply and external power supply, achieving the advantages of flexible use and cumulative flow measurement. This item is used to monitor the mass flow rate of dry, clean, and non corrosive gases such as air, nitrogen, and oxygen (excluding flammable and explosive gases). It can be widely used in scientific research, fire protection, environmental monitoring, tobacco, smart agriculture, food, medicine and other industries in universities.
3 AA Batteries/External power supply. 1 Digital Gas Flow Meter. OR, you may choose to have a replacement. We will reply you ASAP. Our aim is to provide Top Level Customer Service, normally so we will try our best to solve any problem you have.Our customer-oriented service strives for. Business time: GMT8 (9:00-18:00) from Monday to Friday.