Metal heat treatment furnaces Measuring dew point in furnace gas Successful metal heat treatment requires dew point measurement Are you involved with industrial processes such as sintering, brazing, annealing or some other metallurgic process? Metal heat treatment is a complex and critical process that requires precise control of the furnace atmosphere. The moisture content in the furnace atmosphere affects the quality and consistency of the heat treatment process, as well as the properties and performance of the final products. Therefore, it is essential to measure and control the dew point of the furnace atmosphere accurately and reliably. What does it take to measure dew point in metal heat treatment furnaces? Dew point is the temperature at which water vapor in a gas condenses into liquid water. It indicates how much moisture is present in a gas. A low dew point means a dry gas, while a high dew point means a moist gas. Different heat treatment processes require different dew point levels depending on the type of metal and the desired outcome.Because of the wide variety of thermal heat treatment processes, target dew point temperatures can range from –60°C (–76°F) to elevated levels of +35°C (95°F) and even higher. Due to the extremely high oven process temperatures typically involved in heat treating, a sampling line from the furnace to the dew point probe is normally required to cool the process gas before reaching the sensor. Vaisala DRYCAP®: The ultimate solution for dew point measurement in metal heat treatment applications To measure dew point reliably in the sampling line, you need high-quality dew point measurement instruments and sample cells that can withstand the demanding conditions. They need to be leak-tight, easy to install and maintain, and compatible with various types of furnaces and gases. Moreover, the instruments provide accurate, stable, and fast readings that can be transmitted to a display or a control system. Vaisala DRYCAP® dew point measurement instruments meet the criteria for high-quality metal heat treatment applications. Find the instrument options with DRYCAP sensor technology below. Instruments for measuring dew point in metal heat treatment furnace sampling lines Dew point and temperature probe DMP6 Vaisala DRYCAP® Dew Point and Temperature Probe DMP6 is designed for in-line humidity measurement in industrial drying applications with very high temperatures and a wide dew point range. Learn more Dew point and temperature probe DMP7 Vaisala DRYCAP® Dew Point and Temperature Probe DMP7 is made for tight spaces and low-humidity applications. Its short probe length makes it suitable for installations that have limited space. Learn more Dew point and temperature probe DMP8 Vaisala DRYCAP® Dew Point and Temperature Probe DMP8 is designed for industrial low-humidity applications with pressure up to 40 bars. Learn more Insight PC Software Lorem Ipsum is simply dummy text of the printing and typesetting industry. Lorem Ipsum has been the industry's standard dummy text ever since the 1500s, when an unknown printer took a galley of type and scrambled it to make a type specimen book. Learn more Indigo80 Handheld Indicator The latest addition to the Indigo family of transmitters and probes, the Indigo80 is a compact, handheld indicator and data logger. Learn more DMP80 DRYCAP® dew point probe for Indigo80 Optimized for portable data logging and measurement spot-checking of process dew point measurements in a wide range of temperatures and pressure ranges. Learn more Indigo500 Series Transmitters The Vaisala Indigo500 series transmitters are host devices for Vaisala Indigo-compatible, stand-alone probes. The Indigo500 series includes the Indigo520 and Indigo510 transmitters. Learn more Indigo300 Series Transmitters Vaisala Indigo300 transmitters are host devices for Vaisala Indigo-compatible, stand-alone smart probes. Indigo300 transmitters send measurement values to automation and control systems through analog signals, and they can also be used for standalone monitoring. Learn more Metal manufacturing measurement resources Blog Do I need an Indigo transmitter or just an Indigo probe? Deciding whether to use just a probe or a combination of probe and transmitter is determined by what kind of system connections you have. Can you use Modbus RTU serial protocol, for example? Is your power supply suitable? Is there a need for galvanic isolation? LEARN MORE Application note Compressed air sampling for moisture detection To get a representative sample of the process gas and avoid potential sources of error caused by incorrect sampling practices, a few aspects should be considered. Read about the best practices and download a pdf with Vaisala sample cells included. LEARN MORE Industry page Chemicals and allied products We are also specialized in inline process refractometers and optical process analyzers for refractive index-based concentration measurements. The instruments range from compact probe models for small pipeline and bypass lines to rugged heavy-duty long probe versions. LEARN MORE Application note Acid passivation of stainless steel parts Monitoring of concentration of nitric acid, citric acid in stainless steel passivation process. DOWNLOAD Application note Metalworking and machining application note Concentration measurement of hydraulic fluids, cutting oils, cooling lubricants and washing liquids in metalworking and machining. DOWNLOAD
