| Measured variable |
Volumetric flow |
|
Nominal diameter
|
DN10~DN200 |
| Range ratio |
DN10: 1:6；DN15~DN200: 1:10 |
| Current output |
2-wire (4~20) mA output, accuracy 0.2%, load 500Ω |
| Pulse output |
Pulse width: ≤500ms (divided equally based on frequency); Pulse frequency: (1-5000) Hz (based on turbine diameter); Pulse coefficient: determined by the turbine diameter |
| Communications |
RS485, MODBUS-RTU communication protocol |
| Power supply |
DC: (20~24)V；Battery: 3.6V lithium battery |
| Power consumption |
24VDC: ≤0.48W；Battery powered: current ≤1mA |
| Cable entries |
M20*1.5 Cable gland |
| Accuracy |
0.5%, 1.0% |
| Repetitiveness |
1/3 of accuracy |
| Response time |
250ms |
| Measurement medium |
Liquids (such as water, liquefied petroleum gas, finished oil, light crude oil, organic liquids, inorganic liquids and other liquids without fibre or particle impurities) |
| Medium viscosity |
Less than 5×10⁻⁶ m²/s. For liquids larger than 5×10⁻⁶ m²/s, the meter should be calibrated in real liquid and used according to the new meter coefficient. |
| Medium temperature |
Standard: (-20～80)℃；High temperature type: (-20～150)℃ |
| Pressure rating - Threaded connection |
DN10~DN50: PN<6.3MPa；DN65~DN100: PN<1.6MPa |
| Pressure rating - Flange connection |
DN10~DN200: PN<1.6MPa |
| Pressure rating - Clamp connection |
DN65~DN100: PN<1.6MPa |
| Ambient environment |
Standard temperature: (-20~60)℃; Relative humidity: 5%~90% |
| Storage environment |
Ambient temperature: (-20~60)℃; Relative humidity: ≤85% |
| Ingress protection |
IP65 (IP67, IP68 optional) |
The FLC400 liquid turbine flowmeter is a precision volumetric flow instrument engineered for clean, low-viscosity liquids. It combines a high-accuracy turbine sensor with an intelligent converter supporting 2-wire 4-20mA, pulse and RS485 MODBUS-RTU outputs, as well as local LCD display. With 0.5% accuracy, a wide 1:10 range ratio and DN10-DN200 sizes, the FLC400 delivers reliable flow measurement across petrochemical, metallurgy, paper making and general industrial processes. As a core instrument of the computing-power industry, it is widely deployed in data center liquid cooling loops — precisely metering coolant flow in CDU and cold-plate systems and feeding real-time data to BMS/DCIM platforms for energy-efficient thermal management.
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Key Features
- High accuracy (0.5%, 1.0%) and good repeatability (1/3 of accuracy).
- Wide range ratio up to 1:10 (DN10: 1:6, DN15-DN200: 1:10).
- Multiple outputs: 2-wire 4-20mA (0.2% accuracy, 500Ω load), pulse, RS485 MODBUS-RTU.
- Multiple connections: threaded, flange (HG/T 20592-2009), clamp — easy to select.
- Simple structure, easy to install and use; low overall power consumption.
- Optional local display: segment LCD or lattice LCD; battery powered available (3.6V lithium battery, current ≤1mA).
- No sealing ring, no leakage; materials: 304SS/316SS sensor, dual-phase 2205 or 430F impeller.
- Ingress protection IP65 standard (IP67/IP68 optional); optional high temperature type up to 150℃.
When the measured liquid flows through the sensor, its internal impeller rotates with the liquid kinetic energy. The impeller blades cause the magnetic resistance in the detection device to change periodically, inducing an electric pulse signal proportional to the flow rate at both ends of the detection coil. The pulse signal is amplified by the preamplifier and sent to the display unit, where a single-chip microcomputer calculates the instantaneous flow rate and the accumulated total from the pulse count and the meter coefficient K (K=f/Q and K=N/V).
▪ Data Center Liquid Cooling — coolant (water or water-glycol) flow metering in CDU units, cold-plate loops and immersion cooling systems; integrated with BMS/DCIM for real-time monitoring.
▪ Petrochemical & Oil — LPG, finished oil, light crude oil and other clean liquid metering.
▪ Metallurgy — process cooling water and fluid measurement.
▪ Paper Making — clean process liquid flow measurement.
▪ General Industry — organic/inorganic liquids without fiber or particle impurities, water treatment, dosing and batching lines.
Q: Which liquids can the FLC400 measure?
A: Clean liquids without fiber or particle impurities, such as water, LPG, finished oil, light crude oil and other organic/inorganic liquids.
Q: What is the accuracy?
A: 0.5% or 1.0% depending on configuration; repeatability is 1/3 of accuracy.
Q: What outputs are available?
A: 2-wire (4~20)mA current output, pulse output and RS485 MODBUS-RTU communication.
Q: Can it run on battery?
A: Yes. A 3.6V lithium battery option powers the meter with current ≤1mA.
Q: Can it measure high-temperature media?
A: Yes, the high temperature type is rated (-20~150)℃; standard type (-20~80)℃.
Q: What about liquids with viscosity above 5×10⁻⁶ m²/s?
A: The meter should be calibrated in the real liquid and used according to the new meter coefficient.
Q: What is the ingress protection?
A: IP65 as standard; IP67/IP68 available as options.
