SMITH4012G, SMITH 5013 G series gas mass flowmeter  used a special kind of mechanical and electrical integration product structure and measurement principle to design and manufacture the gas flowmeter which is suitable for scientific research, war industry, medical treatment and all kinds of industries to measure the gas flow more accurately. It can be compensation for measuring flow in the condition of state  directly. it is very advanced instrument in the world.
SMITH4012G : big diameters gas mass flowmeter (DN25-1000); SMITH5013G : miniature gas mass flowmeter; It can accumulated flow, transient flow instructions, single flow, etc, also may the output pulse signal, 4 ~ 20 mA or 1 ~ 5 v analog signals, 4 ~ 20 mA + HART, MODBUS, support RS232 and RS485 communication, etc.