The fluid flows through the sensor housing. Since the impeller blades form a certain angle with the flow direction, the fluid impulse exerts a torque on the blades. The blades rotate after overcoming the frictional torque and fluid resistance, and the rotational speed stabilizes when the torques are balanced. Under certain conditions, the rotational speed is proportional to the flow velocity. As the blades are magnetically conductive and situated in the magnetic field of the signal detector (consisting of magnets and coils), the rotating blades cut the magnetic lines of force and periodically change the magnetic flux of the coils, thereby inducing an electrical pulse signal at both ends of the coils. This signal is amplified and shaped by an amplifier to form a continuous rectangular pulse wave with a certain amplitude, which can be transmitted remotely to the display instrument for showing the instantaneous and cumulative flow of the fluid. Within a specific flow range, the pulse frequency f is proportional to the instantaneous flow Q of the fluid passing through the sensor, with the flow equation as follows:

Where: – Pulse frequency [Hz]; – Meter factor of the sensor [1/m], provided in the calibration sheet. When the unit is [1/L], ; – Instantaneous fluid flow (under operating conditions) [m³/h];3600 – Conversion factor.

The meter factor of each sensor is filled in the verification certificate by the manufacturer. Once the value of

is set in the matched display instrument, the instantaneous flow and total cumulative flow can be displayed directly.

PRODUCT ADVANTAGES

High accuracy, generally up to ±1%R, ±0.5%R, and the high-accuracy model up to ±0.2%R;
Excellent repeatability. Ultra-high accuracy can be achieved with regular calibration or online calibration, making it the preferred flowmeter for trade settlement;
Equipped with meter factor calibration function, intelligently compensates for the non-linearity of meter factor, and supports on-site calibration;
All valid data can be retained for 10 years without loss after power failure;
Wide turndown ratio, up to 1:20 for medium and large calibers, and 1:10 for small calibers;
Compact and lightweight structure, easy installation and maintenance, and large flow capacity;
Suitable for sealed measurement, no drilling required on the meter body, easy to be manufactured into explosion-proof meters.

TECHNICAL PARAMETERS

Item	Specification
Executive Standard	Turbine Flow Sensor (JB/T9246-1999)
Connection Mode	Threaded, Clamp, Flanged, Clamped
Accuracy Class	±1%R, ±0.5%R, ±0.2%R (Customized Required)
Sensor Material	304, 316 Stainless Steel, etc.
Operating Conditions	Medium Temperature: -20℃～+120℃; Ambient Temperature: -20℃～+60℃; Relative Humidity: 5% - 90%; Atmospheric Pressure: 86Kpa～106Kpa
Signal Output Function	Pulse Signal, 4-20mA Signal
Communication Output Function	RS485 Communication, HART Protocol, etc.
Working Power Supply	External Power: 24VDC±15%, Ripple ≤±5%, applicable to 4-20mA output, pulse output, RS485, etc.; Internal Power: 1 set of 3.6V 10AH lithium battery, normal operation available when battery voltage is 2.0-3.0V
Signal Cable Interface	Basic Type: Hausmann connector or built-in three-core cable; Explosion-proof Type: Female Thread M20*1.5
Explosion-proof Grade	Exia Ⅱ CT6 or Exd Ⅱ BT6
Protection Grade	IP65 or higher (Customizable)

APPLICATION FIELD

Flanged liquid turbine flowmeters are widely used in the measurement and control systems of petroleum, chemical, metallurgical, scientific research and other fields. Liquid turbine flowmeters equipped with sanitary joints can be applied in the pharmaceutical industry. A flanged liquid turbine flowmeter that meets the flow measurement needs of various industries can adapt to the diversified measurement and control requirements in multiple fields.