Gas sampling probe and flue gas analyzer equipped with it

摘要

This probe (10) comprises a case (21) provided with an opening part (24A) for introducing sampling gas, a filter (30) that is accommodated in the case (21) and removes dust included in the sampling gas introduced into the case (21), and a heater unit (40) for heating the filter (30). The heater unit (40) comprises a first heater (41) that is intended to be constantly energized, a second heater (42) that is a heater for heating capacity adjustment, and a thermostat (50) for switching the second heater (42) on and off according to the temperature of the filter (30). Through the switching on and off of the second heater (42) by the thermostat (50), the heater unit (40) is capable of keeping the temperature of the sampling gas that passes through the filter (30) at a temperature at which the condensation of the sampling gas is suppressed.