Many Dwyer Instruments, Inc. electrical products are connected to the receiver and power supply with wires that are run through electrical conduits. Often, the conduit passes through multiple ambient temperature zones in the building or plant installation.
These temperature changes can cause water vapor condensation inside the conduit.
If this condensation flows into or forms in the instrument, it can create electrical shorts or lead to corrosion that can create an instrument failure.
Continue reading “Condensation Issues in Instrumentation Enclosures and How to Prevent Them”
Explosion-proof Differential Pressure Switches
Question: What are the differences between the Series 1950 and 1950G Explosion-proof Differential Pressure Switches? Continue reading “Ask the Expert – What are the differences between the Series 1950 and 1950G Explosion-proof Differential Pressure Switches?”
Many new users of the award-winning SMART Air Hood® Balancing Instrument ( Series SAH) compare their new readings to those of their old, traditional air flow hoods. While the readings on a 3 cone step diffuser, 4 way diffuser and many return registers are very similar; users have noticed that swirl diffusers, slot diffusers and other directional diffusers give a lower reading on the SMART Air Hood® Balancing Instrument when compared to traditional air flow hoods. Continue reading “Why Does the SMART Air Hood® Balancing Instrument Measure a Lower Flow than Traditional Air Flow Hoods?”
Dwyer Instruments, Inc. products have enclosures that are designed to be rated weatherproof, dust-proof, or even submersible. There are two main rating codes for enclosure protection classification: NEMA and IEC.
In the United States, the National Electrical Manufacturers Association
(NEMA) has publication 250-2003, Enclosures for Electrical Equipment, that is commonly used for ratings. Underwriters Laboratories (UL) has similar ratings to the NEMA ratings. Meeting a NEMA rating on a product can be self-declared by the manufacturer based on product testing; whereas having UL approval to the rating requires testing by UL for proof that the product meets the standard. Continue reading “Enclosure Ratings for Personal Protection and Dust/ Water Ingress Protection”
Even before the AHR Expo officially opened to general attendees on January 22
nd, guests of Dwyer Instruments were part of a highly anticipated release and demonstration of the Insertion Electromagnetic Flow Transmitter at the company’s booth. More than a dozen individuals from the HVAC industry experienced the features and benefits of this new magmeter firsthand. Continue reading “Dwyer Releases the New Insertion Electromagnetic Flow Transmitter at AHR Expo 2018”