Posts Tagged remote-mount transmitter
Using a wireless radio battery to power a pressure transmitter
Posted by danweise in Cost Issues, Measurement, Pressure Transmitters, Transmitters, WIKA, Wireless, Wireless on March 7, 2012
In an ideal world, every place you need to install a transmitter would have easy access to electrical power. But we don’t live in the ideal world, and there are locations where power isn’t readily available, and getting electrical power to those areas can be quite costly.
This was the situation at a local plant, in their flammable fuel storage facility. The site is required to keep a record of the line pressure that supplies water in the event of a fire.
The Problem
The water pipe is located 6 to 7 feet (2 meters) below grade, and the engineers planned to build a vault where they could install and maintain the necessary submersible pressure transmitter.
The planned location is more than 500 yards from any available power source. The signal coming from the pressure transmitter would have to run that distance plus an additional 200 yards to reach the control room.
Not surprising, the trenching cost for an electrical installation was quoted at a five-figure minimum price.
Finding a solution
The project engineer started considering a wireless solution, and then asked, “Can a battery-powered industrial radio also power a two-wire loop-powered pressure transmitter?”
Should I use a chemical seal with my pressure instruments?
Posted by danstips in Honeywell, Pressure, Pressure Gauges, Pressure Switches, pressure switches, Pressure Transmitters, pressure transmitters, Siemens, Switches, Transmitters, United Electric, WIKA on January 17, 2012
Pressure instruments in contact with the process can take a real beating. Process fluids can corrode the wetted parts and destroy the sensing element. Media the solidifies can clog the pressure-sensing port. Or, an installed instrument can affect the process by providing a spot for media remnants to remain after cleaning and purging. Specialized chemical seals deal with these pressure sensing issues.
Here’s a list of questions to ask about your application that will determine if you need a chemical seal with your gauge, switch, or transmitter.
Lesman Tech Tips 