Magmeter wires: Should I go for two or four?

Flow Q&A

I've been looking at electromagnetic flow meters (for conductive liquid and fresh water) recently. Many EMFs use four wires, two for signal, two for power. I'm interested in one with only two wires. Are there any known issues with two wires that make four a better solution?

Expert’s answer: Should you go for two or four magmeter wires?

Magmeter wires, eh? Ok, here’s the deal- the two-wire flow meter will offer you at least one advantage over a four-wire: loop-powered flow meters. A loop-powered meter will save money on new installation because you need only a pair of cables for power and signal.

Nonetheless, the two-wire device has its limitations. Loop-powered meters don’t come in a wide range of sizes, and they add voltage drops to your loops. Ultimately, it’s up to you whether you should choose two or four wires.

Where can you find more information on magmeter wires?

Want more information about magmeter wires and loop-powered flow meters? We’ve collected useful information in the links below.

Check these companies for loop-powered flow meters:

Other resources that might interest you

Rosemount 8712 and another flow sensor
Can a Rosemount 8712 be installed with another brand sensor?

Rosemount 8732 communication!
Why doesn’t communication function between a handheld and the Rosemount 8732?

Rosemount 8712 damping
What’s the maximum damping time you can set up for the Rosemount 8712

Rosemount 8712 testing
Is there a tool that can simulate a flow meter for testing transmitter conditions?

Related tags: Electromagnetic Endress+Hauser Flow Flowmeter Foundation Fieldbus HART Krohne Magmeter Profibus PA Volumetric Flow Yokogawa
Comments
Hi! It's nice to see you're interested
If you want to ask a question, or you want to contribute and reply to post, you have to sign in. Don't worry, we won't send you newsletters without your permission!
Magmeter wires: Should I go for two or four?
Ultrasonic flow meters and their applications
Vortex flow meters - what you need to know
What's the difference between electronic and conventional DP transmitters?
What should I know about electromagnetic flow meters (magmeter)?
See related devices