EBME Forums Forums Maintenance Test Equipment About Timeter RT-200

I carefully observed this high-speed flow sensor,Inside is a gas resistance made of a lot of copper sheets,I think the rapid flow of gas should be prevented,Lead to pressure difference.Get P+ and P- pressure values,Corresponding to the flow value according to the pressure difference, and then display.
There is a copper tube at the front of the airlock chamber and a copper tube at the rear.Behind the copper tube is the red wire and the blue wire.Leave the circuit.I test the resistance of the red and blue wires separately,They are all 3.93K ohms,Are they temperature sensors PT100? pt1000? Or K galvanic couple