Heat Treating Applications
REASONS FOR MEASURING THE MOISTURE CONTENT IN HEAT TREATING FURNACES
Heat Treating is used to alter the physical, and sometimes chemical, properties of a material. The presence of impurities/contaminants (e.g. moisture) in this process will often produce undesired results.
CHALLENGES IN MEASURING THE MOISTURE CONTENT IN FURNACE GAS
1) Prior to heat treating the components are commonly cleaned with substances containing chlorides, of course residues from the cleaning agents remain on the components. As these residues are heated they will produce Cl, HCl and Cl2 radicals which are harmful to most moisture measuring sensors. Phymetrix sensors have been designed and time tested to operate in these harsh environments.
2) Heat treating is performed at temperatures higher than the operating temperature of any moisture sensor, thus the gas being sampled must be cooled before it is measured. Phymetrix offers a heat exchanger specially designed for this purpose.
3) The gas pressure in the furnace may not be sufficiently high to cause gas to flow into an external analyzer especially if there is a heat exchanger. The Phymetrix PPBa has an optional vacuum pump with rechargeable battery built it.
THE BEST CHOICE FOR MEASURING FURNACE GAS MOISTURE CONTENT
The PhyMetrix Nanotechnology based moisture sensor combined with the unique PhyMetrix instrument design provide a much needed solution for Moisture Measurement in Heat Treating Applications.
The NanoTechnology Sensor: The PhyMetrix moisture analyzers utilize a proprietary Nanotechnology based metal oxide sensor. The NanoPore structure allows for a quick response on wetting-up and drying-down, high accuracy and reproducibility. Nanoscience by its very nature allows us to bring change in the critical properties of materials and thus add a new dimension to their applications. Consequently, our technology allows accurate, reproducible and quick measurements in the range of -110°C dewpoint to +20°C dewpoint.
PORTABLE MOISTURE ANALYZER FOR FURNACE GAS
A portable moisture analyzer, such as the handheld model PPMa or PPBa can be used to spot check measurements and determine if the on-line analyzer measurements are in agreement with the portable, which can be periodically sent to a lab for comparison to a NIST traceable chilled mirror standard. The Portable analyzer exposes its sensor to the Furnace Gas under measurement for a very short time (few minutes) thus contamination is minimal, in addition the sensor is stored in a desiccant chamber where the desiccant absorbs any of the contaminants that were accumulated on the surface of the sensor.
The PhyMetrix product line is ideal for the moisture measurement needs in Furnace Gas the on-line (ExMa/PLMa) and hand-held (PPMa/PPBa) provide:
● High Accuracy over a wide measuring range -110°C to +20°C dewpoint
● Speed of Response
● Eliminating unpleasant time consuming cleaning procedures
● Saving valuable service technician time
● Low Cost of Ownership
● Extremely Easy to Operate, with intuitive graphical user interface
● Resistant to Contaminants common in field measurements e.g. Cl, HCl and Cl2
● Superior Reliability
● Hazardous area use approvals
● Portable analyzer available for spot checking
● Expert prompt support from PhyMetrix engineers.
● Training software available for technicians to practice on the use of the analyzer at their convenience.