APPRATUS FOR PREVENTING POLLUTION OF PROBE FOR GAS MEASURING OF IN-SITU TYPE

摘要

PURPOSE: A pollution preventing apparatus of probe for measuring in-situ type gas is provided to prevent damage to optical instrument components due to exhaust gas by shielding an inner pipe when the supply of air for an air curtain is stopped or weak. CONSTITUTION: A pollution preventing apparatus of probe for measuring in-situ type gas comprises a transceiver, a sensor, and a shield valve(40). The transceiver transmits and receives the light. One end of a sensor is connected to the transceiver. The sensor is made of an inner pipe(21) and an outer pipe(22). The sensor detects exhaust gas passing through a gas checking area. The shield valve is installed at both ends of the gas checking area of the sensor.