Patent ID: 6355150
Filing Date: 2002-03-12
Classification: G01N,G05D

Abstract:
Analyser for continuously measuring the H2S content of a gas sample, said analyser comprising:a drying module (2) for drying the gas sample, comprising an inlet (3), connected to a nozzle (5) for taking and injecting the gas sample, and an outlet (4) for discharging a dried gas sample; a compressor module (10) having a suction port (9), connected via a line (8) to the outlet of the drying module, and a discharge port (11) coupled to a flow line (12) for discharging a compressed gas sample, the flow line (12) being equipped with an indicating and/or regulating primary flow meter (13); a system for diluting the compressed gas sample, comprising: an air intake line (14), which is mounted as a branch off the flow line (12) carrying the compressed gas sample, the air intake line being located downstream of the primary flow meter, the air intake line being equipped with a regulating secondary flow meter (17) for controlling the degree of opening of a valve (16) having an adjustable opening, mounted in the air intake line downstream of the secondary flow meter, the system including a regulating module (18) connected to each of primary and secondary flow meters; and an electrochemical sensor (21) for measuring H2S, which is mounted in the flow line (12) downstream of the air intake line (14), the sensor generating an output signal (22) proportional to the concentration of H2S in the gas sample.