A batch chemical plant needed accurate feeding of flammable raw materials into reactors, together with heat-transfer monitoring on the supply lines. The YF-W200D Ex ultrasonic flow meter measures feed flow externally and, using paired Pt100 transducers, also calculates thermal energy on hot utility lines.
The challenge
- Reactor feed includes flammable liquids in an explosion-classified bay.
- Accurate feed totals are needed for batch recipe and yield control.
- Wanted heat/energy visibility on hot-water supply to jacketed reactors.
- Preferred a single instrument family to simplify maintenance.
The solution: YF-W200D
Clamp-on YF-W200D meters were installed on stainless feed lines and a second unit with Pt100 temperature inputs on the hot-utility line. Flow totals support batching, while the energy calculation quantifies heat delivered to the reactor jacket. See the YF-W200D specifications →
- Non-contact Ex measurement of flammable reactor feed.
- Totalized volume supports precise, repeatable batch recipes.
- Pt100 inputs enable heat/BTU energy calculation in the same platform.
- 4–20 mA and Modbus integrate feed and energy data into the DCS.
Configuration used in this application
| Instrument | YF-W200D explosion-proof transit-time ultrasonic flow meter |
|---|---|
| Transducers | Clamp-on on stainless feed line; Pt100 on utility line |
| Line size / material | DN50 stainless steel |
| Fluid | Flammable feed stock / hot utility water |
| Accuracy | ±1% flow; energy via paired Pt100 |
| Fluid temperature | -30 to +160 °C rated |
| Outputs used | 4–20 mA, pulse, RS485 Modbus |
| Inputs used | 4–20 mA analog + Pt100 temperature |
How it is deployed
- Fit clamp-on transducers on the reactor feed line with adequate straight run.
- Install paired Pt100 sensors on the hot-utility supply and return.
- Mount Ex converters and wire transducers, analog I/O and bus.
- Configure batch totals and energy calculation, then verify against recipe logs.
What the operator gets
- Accurate, repeatable flammable-feed batching in a safe Ex installation.
- Heat delivered to reactor jackets quantified for process control.
- One instrument family for both flow and energy, simplifying maintenance.
- No wetted sensors or pressure drop on feed lines.
Frequently asked questions
How does the YF-W200D calculate thermal energy?
With paired Pt100 temperature transducers on supply and return, it combines flow rate with the temperature difference to compute heat/BTU energy in real time.
Can it totalize feed for each reactor batch?
Yes, the internal totalizer and pulse/Modbus outputs provide cumulative feed volume that can be assigned and reconciled per batch.
Is clamp-on reliable for small stainless feed lines?
For DN50 stainless lines with adequate straight run and clean fluid, transit-time clamp-on provides dependable ±1% measurement.
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