Dear sirs, I'm looking for some special sensors, working in the following conditions: about 200ÂșC of temperature, and about 200 kg/cm2 of pressure, in a water/steam system. We need to measure the following items: oxygen, water-solved hydrogen, pH, conductivity, potential and elecrochemical noise. I would be very grateful if you could send me information about this subject. Mrs. Eulalia Ferrando