In many industrial processes, the materials and the end product or by-products of the process, such as dust or vapors, can create conditions for a hazardous environment. Processes that have potential for hazardous environments include: water treatment, oil drilling, gas and chemical processing, power generation, pharmaceutical, and food manufacturing. The measurement and control of these processes are essential in maintaining optimal conditions of the manufacturing system and preventing catastrophic events. Continue reading “The Operation of Gages and Switches in Hazardous Environments”
A daisy chain is a wiring strategy where multiple devices are wired together in sequence. This is similar to the way in which flowers can be linked together to form chains or rings, using flower stems as a chain to connect each flower to one another.
In this example, a pressure transmitting cell is the “daisy” and a circuit loop is the “chain.” Continue reading “The Basics of Daisy Chaining”
The Dwyer team recently released the latest model in our line of air velocity transmitters, the Series AVLV. This series is ideal for measuring low air velocity or volumetric air flow in applications such as: clean room systems, pharmaceutical buildings, variable air volume systems, and building ducts. Continue reading “[New Product Highlight] Air Velocity Transmitter | Series AVLV”
What is a data logging USB?
A data logger is a tool used to record a variety of parameters, which can include, temperature, humidity, dew point, current, voltage, and carbon monoxide. The logger is used in the field to record data, then brought back to a computer to collect/graph what was collected. These data loggers are ideal for applications such as: calibration labs, environmental chambers, pharmaceutical plants, and storage warehouses. Continue reading “Ask the Expert: What is a data logging USB, and how do I use it?”
When considering a product for a hazardous location, it is important that the product is appropriately rated for that environment. UL, one of the primary bodies that certifies products for use in hazardous environments, defines a hazardous location as a “location where explosion or fire hazards exist due to the presence of flammable gases, flammable or combustible liquid-produced vapors, combustible dusts, or ignitable fibers or flyings.” Figure 1 shows the conditions that are required to create fire and are often present in hazardous environments: oxygen, an ignition source, and flammable material. Continue reading “Intrinsically Safe Products for Hazardous Locations”