Two Wire Electromagnetic Flowmeter DN25-DN200 Low Power Integration
Product Details
| Liner Material: | PTFE/PFA/F46/Neoprene/Polyurethane | Accuracy Level: | 0.5% |
|---|---|---|---|
| Power Supply: | DC 24V, DC 3.6V Lithium Battery | Accuracy: | ±0.5% To ±1.0% Of Reading |
| Power: | >18W | Diameter Nominal: | DN25~ DN200 |
| Relative Humidity: | 5%~95% | Power Consumption: | <20W |
| Medium: | Liquid | Size: | DN15-DN3000(1/2”~120”) |
| Highlight |
Two Wire Electromagnetic Flowmeter,Electromagnetic Flowmeter DN25,Electromagnetic Flowmeter DN200 |
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Product Description
Low-Power, High-Integration Two-Wire Electromagnetic Flowmeter
A two-wire electromagnetic flowmeter refers to an electromagnetic flowmeter that simultaneously accomplishes power supply and signal transmission using only two wires.
- Extremely low wiring cost and easy installation: Save a large amount of cable and construction costs. The traditional four-wire system requires two power lines and two signal lines, while the two-wire system only needs a pair of twisted wires, making it especially suitable for long-distance and multi-point distribution scenarios.
- Inherent safety and explosion-proof advantage: As the entire circuit's energy is limited to 4-20mA and the voltage is usually at a low level of ≤24V DC, it is very easy to achieve Intrinsic Safety (Ex ia) certification, making it an ideal choice for hazardous areas such as chemical and petroleum industries.
- Strong anti-interference ability: Current signal transmission is not sensitive to changes in line resistance and is less affected by electromagnetic interference, making it suitable for long-distance transmission.
- "Live zero point" for easy diagnosis: The "live zero point" at 4mA can clearly distinguish between "instrument failure/power off (0mA)" and "true zero flow (4mA)", facilitating remote diagnosis.
- Easy system integration: Seamless compatibility with current mainstream DCS/PLC control systems (whose analog input cards generally support two-wire 4-20mA power supply), without the need for additional power distribution.
| Characteristics | Two-wire Electromagnetic Flowmeters | Four-wire Electromagnetic Flowmeters |
|---|---|---|
| Wiring | Two wires (power + signal) | Four wires (two power wires + two signal wires) |
| Power Supply | Loop-powered, DC 24V (commonly used) | Independent power supply, AC 220V or DC 24V |
| Power Consumption | Extremely low (must be ≤ 3.6mA @ 24V, i.e., ≤ 86.4mW) | High, unrestricted, can drive stronger excitation. |
| Maximum Distance | Limited by loop voltage drop, usually at the kilometer level. | Unrestricted power supply distance, signal transmission distance the same as two-wire. |
| Intrinsic Safety | Easy to achieve, preferred in hazardous areas. | More complex to achieve, usually flameproof (Ex d). |
| Cost | Low wiring cost, the meter itself may be slightly more expensive. | High wiring cost, the meter may be cheaper. |
| Applicable Scenarios | High explosion-proof requirements, scattered points, long distances, new digital factories. | Non-explosion-proof areas, on-site power supply available, occasions with extremely high requirements for response speed/functions. |
- Hazardous areas in oil, chemical, natural gas, etc.: tank farm metering, process pipelines, flammable and explosive media.
- Water treatment and municipal water networks: distributed water supply/drainage monitoring points, remote transmission water meters.
- Energy management and building automation: central air conditioning cold/hot water metering, district heating metering.
- Equipment matching and OEM: integrated into complete sets of equipment (such as water treatment units, chemical equipment).
- Newly built digital factories: all plant instrument signals uniformly adopt two-wire 4-20mA standard.
Two-wire electromagnetic flowmeters are a successful example of the development of electromagnetic flowmeter technology towards "low power consumption, high integration, and intrinsic safety". It is not merely a change in wiring method, but also an innovation in system design concept.
Product Highlights
Low-Power, High-Integration Two-Wire Electromagnetic Flowmeter A two-wire electromagnetic flowmeter refers to an electromagnetic flowmeter that simultaneously accomplishes power supply and signal transmission using only two wires. Core Advantages Extremely low wiring cost and easy installation: Save ...
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