Liquid Vortex Flowmeter
1. Product Overview
Liquid vortex flowmeter is a volumetric flow meter based on Karman vortex street principle, used to measure volume flow, standard volume flow and mass flow of gas, steam and liquid. It can also serve as a flow transmitter for automatic control systems.
Adopting advanced differential technology together with isolation, shielding and filtering design, this meter solves common defects of similar products including poor vibration resistance and disordered weak signals. Unique sensor packaging and protection technology ensure stable reliability. Two types are available: basic type only measures flow signal; composite type measures flow, temperature and pressure simultaneously. Both integrated and split structures are optional to fit various installation conditions.
2. Features & Applications
Features
No moving parts, long-term stable performance, simple structure for easy installation and maintenance
Anti-interference circuit and vibration-resistant sensor head to resist ambient vibration
Ultra-low power single-chip microcomputer; one 3.2V 10AH lithium battery lasts over 5 years
Software calibration for meter coefficient non-linearity to improve measuring accuracy
Low pressure loss and wide turndown ratio
EEPROM power-off protection for total flow data, storage life over 10 years
Applications
Widely applied for flow measurement of water supply & drainage, industrial circulation, sewage treatment, oil, chemical reagent, compressed air, saturated & superheated steam, natural gas and various media in pipelines of all sizes.
3. Technical Parameters
Specification | Description |
Nominal Diameter (mm) | 15,25,40,50,65,80,100,125,150,200,250,300; Insert type: 200～2000 |
Nominal Pressure (MPa) | DN15-DN200: 4.0 (higher pressure available on request) DN250-DN300: 1.6 (higher pressure available on request) |
Medium Temperature (℃) | Piezoelectric type: -40～260, -40～320 Capacitance type: -40～300, -40～400, -40～450 (custom order) |
Body Material | 1Cr18Ni9Ti; other materials available on request |
Allowable Vibration Acceleration | Piezoelectric: 0.2g; Capacitance: 1.0～2.0g |
Accuracy | ±1%R, ±1.5%R, ±1FS; Insert type: ±2.5%R, ±2.5%FS |
Turndown Ratio | 1:6 ~ 1:30 |
Power Supply | Sensor: +12V DC, +24V DC Transmitter: +12V DC, +24V DC Battery powered: 3.6V battery |
Output Signal | Square wave pulse (exclude battery version): High level ≥5V, Low level ≤1V Current signal: 4～20mA |
Pressure Loss Coefficient | Cd≤2.4, comply with JB/T9249 |
Explosion-proof Mark | Intrinsic safety: ExiaⅡCT2-T5 Flameproof: ExdⅡCT2-T5 |
Protection Class | Standard: IP65; Submersible: IP68 |
Ambient Condition | Temp: -20℃～55℃, Relative Humidity:5%～90%, Atmospheric Pressure:86～106kPa |
Applicable Media | Gas, Liquid, Steam |
Transmission Distance | 3-wire pulse output: ≤300m 2-wire 4~20mA current output: Max load resistance ≤750Ω |
