Signal Output Turbine Flowmeter

Accuracy class: ±1%R, ±0.5%R, ±0.2%R (R = reading)
Turndown ratio: 1:10 ; 1:15 ; 1:20
Sensor material: 304 stainless steel, 316(L) stainless steel, etc.
Operating conditions

Medium temperature: -20°C ~ +80°C (high-temperature custom available)
Ambient temperature: -20°C ~ +60°C

Signal output functions: Pulse signal, 4–20 mA signal
Communication output functions: RS485 communication, HART protocol, etc.
Power supply:
A. External power supply: +24 VDC ±15%, ripple < ±5%
Applicable for 4–20 mA output, pulse output, RS485

Flange standards

Common standard: GB/T 9113-2010
Other standards:
International pipe flanges: e.g., German DIN, American ANSI, Japanese JIS
Domestic pipe flanges: e.g., Ministry of Chemical Industry standard, Ministry of Machinery Industry standard

Thread specifications

Common specification: Inch pipe thread (external thread) (reference standard GB/T 7307-2001)
Other specifications: Internal thread, spherical thread, NPT thread, etc.

Electrical interface: M20×1.5 internal thread (NPT thread requires custom order)
Explosion-proof rating: Ex d IIC T6 Gb (optional)
Protection rating: IP65 or higher (customizable)

Working principle

turbine flow meter (5) — turbine flow meter

When the measured liquid flows through the sensor, the impeller rotates under the action of the fluid. Its rotational speed is proportional to the average flow velocity in the pipe. The rotation of the impeller periodically changes the reluctance of the magnetic circuit. The magnetic flux in the detection coil changes periodically as a result, generating an induced electromotive force with a frequency equal to the blade rotation frequency. After amplification, this signal is converted and processed.

Range and pressure correspondence table

Meter size, normal flow range, extended flow range			Standard connection type and pressure rating	Special pressure rating (MPa)	Starting flow rate (m³/h)	Maximum pressure loss (kPa)
(mm )	(m3/h)	(m3/h)	Standard connection type and pressure rating	Special pressure rating (MPa)	Starting flow rate (m³/h)	Maximum pressure loss (kPa)
4	0.04-0.25	0.04 ~ 0.4	Threaded connection, 6.3 MPa	Wafer connection, <42 MPa	0.02	120
6	0.1-0.6	0.06 ~ 0.6	Threaded connection, 6.3 MPa		0.05	80
10	0.2 ~ 1.2	0.15-1.5	Threaded connection, 6.3 MPa		0.07	50
15	0.6-6	0.5-5	Threaded connection, 6.3 MPa		0.35	35
20	0.8-8	0.45 ~ 9	Threaded connection, 6.3 MPa		0.3	35
25	1~ 10	0.5 ~ 10	Threaded connection, 6.3 MPa		0.4	35
32	1.5-15	0.8-15	Threaded connection, 6.3 MPa		0.6	35
40	2 ”20	1~20	Threaded connection, 6.3 MPa		0.6	35
50	4~40	2~40	Flange connection, 4.0 MPa		1	35
65	7~70	5~70	Flange connection, 1.6 MPa	Wafer connection, <25MPa	4	25
80	10-100	7-100	Flange connection, 1.6 MPa	Wafer connection, <25MPa	5	25
100	20-200	10-200	Flange connection, 1.6 MPa	Wafer connection, <16 MPa	8	25
125	25-250	13-250	Flange connection, 1.6 MPa	Wafer connection, <16 MPa	10	25
150	30-300	15-300	Flange connection, 1.6 MPa		12	25
200	80 ~ 800	40 ~ 800	Flange connection, 1.6 MPa	Wafer connection, <6.4MPa	20	25
Accuracy class	0.5	1.0		–	–	–

Installation precautions:

The sensor should be installed in a location that is easy to maintain, free from pipe vibration, strong electromagnetic interference, and thermal radiation.
For horizontal installation, the pipeline should have no visually noticeable tilt (generally within 5°). For vertical installation, the verticality deviation of the pipeline should also be less than 5°. In places where flow cannot be stopped, a bypass line and reliable shutoff valves should be installed, and it must be ensured that there is no leakage in the bypass line during measurement.
At the position where the sensor is to be installed on a newly laid pipeline, first connect a short pipe section in place of the sensor. After the “pipe cleaning” (pigging) operation is completed and it is confirmed that the inside of the pipeline is clean, then formally install the sensor.
If the fluid contains solid impurities, a filter should be installed on the upstream side of the sensor, and the pipeline should be regularly cleaned and drained of settled impurities. If the measured liquid contains gas, a gas eliminator should be installed on the upstream side of the sensor. The drain ports and gas vent ports of the filter and gas eliminator should be directed to a safe location.
When the sensor is installed outdoors, measures should be taken to protect it from direct sunlight and rain.