Item # 3255 Series, Portable Analyzer for PPM Oxygen and Dew Point

The Model 3255 Portable Analyzer has been designed for the accurate measurement of both PPM levels of O₂ and low-level dew points in furnace atmosphere gas or in other dry process gases.  A customer-replaceable electrochemical sensor senses the O₂. This sensor produces a small output current, which is directly proportinal to the PPM level of O₂ present in the sample.  The dew point is sensed by an aluminum oxide sensor that baries its electrical capacitance with moisture.  The O₂  and dew point signals are then amplified and displayed on the front panel meters.

A unique feature of this analyzer is the built-in micro-blocking valves that trap the last gas sample drawn into the sensors.  This ensures a rapid start and minimum purge-down time when the analyzer is used again.  The optional hydrogen detector is a thermal conductivity (T/C) Cell which responds rapidly to the hydrogen content of the sample gas.  It has an inifinite life.