Khun Pravornpat,
We have an issue with your umbilical length and this need to be finalize the soonest.
We now agree that CEMs cabinet and all calibration gas cylinders are to be inside the room, my estimation is more than 20 meters from stack but we need an exact length of this sampling line. I have told your engineer that 5 meters up from blower joint is where the flange should be and we need a total length from this point to where the CEMs cabinet is to be mounted.
The 10 meters has been ordered but we will standby for your confirmation so we can change an order.