Measuring Flow with Piston Displacement Meters

If you’re looking to purchase a new water meter, it can be hard to discern what type of meter you should pick. There are many things to consider, from the body material to the outputs to whether any approvals are required. One of the most important considerations for selecting a meter for your application is how the meter will be installed, as certain technologies can limit the meter’s installation orientation. For example, multi-jet meters measure flow by generating multiple jets of water against an impeller in an internal chamber. As the impeller rotates, the flow is totalized on the meter face. In order to meet the stated accuracy, multi-jet meters must be installed horizontally. If a multi-jet meter is installed vertically, the impeller will not rotate correctly and the readings will not meet the stated accuracy specification.  Continue reading “Measuring Flow with Piston Displacement Meters”

How to Program a Switch for Manual Reset

Compact Low Differential Pressure Switch with Manual Reset, Series 1900MR

Several applications require manual reset switches, which are switches that need to be physically reset by an individual for a process to continue or restart. A manual reset is often needed when an area has to be inspected prior to equipment restart. This can help to ensure the safety/inspection of both equipment and other individuals in the area.

Some switches have a mechanical manual reset (such as the Dwyer Series 1900, 1831, and 1800). However, there may be a need to have a manual reset for applications beyond what these switches are designed for. If a pump is allowed to run with a clogged filter, for example, this may severely damage the pump. Continue reading “How to Program a Switch for Manual Reset”

How the Dwyer Series IEF and IEFB Overcome Typical Sources of Error

There are a wide variety of technologies that can be used for fluid flow measurement, such as differential pressure, paddlewheel, electromagnetic, and ultrasonic. Furthermore, each technology has multiple installation configurations. It is important to understand the nuances of different technologies and installations in order to pick the right flowmeter for your application. 

When purchasing a flowmeter for an HVAC application, such as boiler feed water monitoring or chilled/condenser water monitoring, we found that our customers value the ability to hot-tap (or pressure tap) a pipe to install an insertion flowmeter. This is done by installing an isolation valve in a pipe, allowing an insertion flowmeter to be placed into and removed from a live system without having to drain it. Draining a system is time consuming, costly, and generally not a good option for HVAC systems in buildings because it requires the entire system to be shut down. Permanently installing a hot-tap valve followed by an insertion flowmeter (with hot-tap capability) is an ideal alternative to a costly inline meter. 

When considering an insertion flowmeter for an HVAC application, there are four key sources of error to be aware of:  Continue reading “How the Dwyer Series IEF and IEFB Overcome Typical Sources of Error”

Product Highlight: Mark Series Position Indicators/Switches/Transmitters

The Proximity Mark Series is a line of position indicators with a selection of various output options. The Mark Series has three different model styles, which allow it to be used in almost any application.

Pictured: Mark 1 Magnetic Coupling with HART® Wireless Communication

Standard models in the Mark Series are weatherproof and explosion-proof, with visible position indicators. We also offer a submersible model for additional versatility.  Continue reading “Product Highlight: Mark Series Position Indicators/Switches/Transmitters”

Dirty Jobs | Measuring Livestock Manure Level

Imagine that you’re driving down a country road, and you roll down your window to feel the breeze from the wind. You happen to look to your side as you pass a large barn housing dairy cows. Most of us have seen these farms, but many don’t think about what happens to the manure of the animals or how it is utilized in our everyday lives. Manure slurries and lagoons are a vital function of large scale farms for swine, dairy, and poultry.  Continue reading “Dirty Jobs | Measuring Livestock Manure Level”