Brief introduction Beta ray absorption principle is adopted in this instrument. In the event of beta decay, the atomic nucleus emits beta particles. Beta particles are in fact a fast charged particles, it has a strong penetration ability, when it passes through a certain thickness of the absorbing material, its strength with the absorption layer thickness increases and the phenomenon is gradually weakened. Features Direct measurement of the mass of particulate matter by the advanced beta ray absorption principle is not affected by the factors such as particle composition, density, color and so on; Low density, low activity, long half-life (5700 years) of the C14 source, the measurement is stable and without special protection, safe and reliable, will not cause radioactive contamination; Large screen graphic dot matrix liquid crystal display to display conditions, concentration of standard conditions of concentration, history data record, calibration records, alarm records, equipment status information; The positioning of the motor and the paper motor adopts the photoelectric coupler, which has the advantages of high precision, simple structure, etc., and the paper is easy to use; The sampling flow rate is measured by the mass flow sensor, and the atmospheric temperature and pressure are collected, and the sampling rate is obtained; Sampling and measurement are in the same channel, the structure is simple, and the reciprocating motion of filter paper is avoided, and the influence of the return error on the measurement result is eliminated; Process records can be stored and displayed in the near future effective calibration or maintenance process of historical information; The use of large capacity memory, can store up to 10 years of historical data. RS232 digital output, through the data acquisition instrument for computer remote communication, remote monitoring; The flow rate of sample gas flow is controlled by the flow control valve, which ensures the accuracy of the flow in the long run; Selection of new glass fiber filter paper, high strength, not easy to break; Adopt a flexible paper pressing mechanism, mechanical transmission part of the design is simple, reliable, greatly reducing the cardboard, paper mechanical faults such as broken; The instrument with low power consumption, heat pump <280W The instrument operation failure rate is low, little maintenance (except the normal replacement of paper tape, maintenance once every two months) Instrument calibration cycle is long, can be calibrated once a year PM10 PM2.5 cutter has been identified by the Academy of Medical Sciences Institute of environmental health and engineering China prevention.
Brief introduction Beta ray absorption principle is adopted in this instrument. In the event of beta decay, the atomic nucleus emits beta particles. Beta particles are in fact a fast charged particles, it has a strong penetration ability, when it passes through a certain thickness of the absorbing material, its strength with the absorption layer thickness increases and the phenomenon is gradually weakened.
