| Accuracy class： | class 0.5, class0.3,class 0.2 |
| Ambient temperature: | -40℃~60℃ |
| Medium temperature: | -20℃～60℃for series LL-A; -41℃～+60℃ for cast steel and alloy aluminum meters. |
| Signal output: | 4-20mA analog signal, pulse signal, RS485, HART, etc. are available for selection. |
| Explosion proof sign: | Exd IIC T6 Gb，Exdb IIC T6 Gb |
| protection grade: | IP66 |
The LL series Roots Flowmeter are generally comprised of measuring chamber, sealing coupling and accumulating counter which can indicate total liquid volume and instantaneous flow, matched a pulse transmitter and intelligent flow controlling instruments ,it can realize remote (batch, integrated, intermittent) measurement and control.
The meters are widely used for the flow measurement in the field of petroleum, chemical, chemical fiber, traffic, food industries and commerce, medical and sanitary departments.
| DNmm | Viscosity2.0～150MPa·s | Viscosity0.6～2.0 MPa·s | Viscosity2.0～150MPa·s | Viscosity0.6～2.0 MPa·s | Viscosity2.0～150MPa·s | Viscosity0.6～2.0 MPa·s | Note |
| 15 | 0.25～2.5 | 0.5～2.5 | 0.5～2.5 | 0.6～2.5 | 0.6～2.5 | 0.8～2.5 | max. instantaneous flow could be 110% of the max.flow in the table。 |
| 20 | 0.25～2.5 | 0.5～2.5 | 0.5～2.5 | 0.6～2.5 | 0.6～2.5 | 0.8～2.5 | |
| 25 | 0.6～6 | 1.2～6 | 1.2～6 | 1.5～6 | 1.5～6 | 2～6 | |
| 40 | 1.6～16 | 3.2～16 | 3.2～16 | 4～16 | 4～16 | 5～16 | |
| 50 | 2.5～25 | 5～25 | 5～25 | 6～25 | 6～25 | 8～25 | |
| 80 | 6～60 | 12～60 | 12～60 | 15～60 | 15～60 | 20～60 | |
| 100 | 10～100 | 20～100 | 20～100 | 25～100 | 25～100 | 33～100 | |
| Accuracyclass | 0.5 | 0.3 | 0.2 | ||||
| Type | Shell andcover | Cover plate | rotor | Rotary shaft | Sheath of shaft | Nominal pressure （MPa） |
| LL-AL | Cast iron | Cast iron | Alloy aluminum | Stainless steel | rolling bearing | 0.6、1.0、1.6 |
| LL-EL | Cast steel | Cast iron | Alloy aluminum | Stainless steel | rolling bearing | 2.5、4.0 |
| LL-LL | Alloy aluminum | Cast iron | Alloy aluminum | Stainless steel | rolling bearing | 0.6、1.0 1.6 |
| Note | Specific design for special contract | |||||
Reliable Remote Signal Output for Liquid Flow Measurement
Liquid flow meters are widely used in water treatment, chemical dosing, food processing, and industrial pipelines. To meet modern monitoring requirements, liquid flow meters are equipped with multiple signal transmission options for long-distance and real-time data collection.
Application Value:
Seamless Integration into Automated Liquid Control Systems
Liquid flow meters play a key role in automated process control, especially where precise flow regulation is required.
Fully compatible with PLC systems (Siemens, Schneider, Mitsubishi, Allen-Bradley, etc.)
Supports SCADA and DCS platforms for centralized control and visualization
Enables automatic valve and pump regulation based on real-time flow feedback
Suitable for closed-loop control in dosing, mixing, and filling processes
Automation Benefits:
Smart Liquid Flow Measurement with IoT Connectivity
IoT-enabled liquid flow meters allow users to monitor liquid flow data anytime and anywhere.
IoT Advantages:
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