SI-3207 Small Turbine Flow Meter
The SI-3207 small turbine flow meter is specifically designed for measuring small-diameter pipes and low flow rates. It can be used to measure both instantaneous and total flow rates of liquids. Available in sizes from DN2 to DN10. Flow rates range from 30L/h to 160L/h. Customization options include a displayless design, a Hirschmann electrical interface, and a smaller footprint. Three-wire pulse output, two-wire 4-20mA output, or three-wire voltage output are available.

| Diameter | DN2~DN300 |
| Accuracy | 1.0%, 0.5% to 2.0% of reading |
| Temp. range | -20~+120℃ |
| Pressure | 1.6 Map, 2.5Mpa, 6.4Mpa, 25Mpa, 40Mpa |
| Output | pulse output, 4~20mA, RS485 or Hart Protocol |
| Power | 24VDC, 12V DC,220VAC, battery |
Features
- Flow sensor diameter: 3/8”, 10mm
- Accuracy level: ±1.0%;
- Liquid flow range: 0.2~1.2 m3/h or 0.15-1.5 m3/h
- Ambient temperature: -20 ° C ~ +50 ° C;
- Medium temperature: measuring liquid: -20 ° C ~ +120 ° C;
- Nominal pressure: 1.6 Map, 2.5Mpa, 6.4Mpa, 25Mpa;
- Explosion-proof grade: ExdIIBT4;
- Connection method: threaded connection, flange connection, etc.;
- Output function: pulse output, 4~20mA, RS485 or Hart Protocol
- Turbine flow sensor material: stainless steel 304 or 316
- Power supply : 24VDC, 12V DC,220VAC, battery

Specifications
| Item | Data |
| Medium | Non-corrosive low velocity liquid without impurity,not suitable for gas/steam |
| Accuracy | Class 1.0, class 0.5, class 0.2 |
| Flange standard | GB/T 9119-2010, DIN, ANSI, JIS |
| Output | Pulse, 4-20mA analog output, RS485 (Modbus-RTU protocol), HART |
| Diameter and installation | Flange connection DN15-DN200 |
| Thread connection: DN2-DN25 | |
| Loose flange connection: DN4-DN200 | |
| Medium temperature | Default type T1: -20℃~+80℃ (Standard) |
| High temp. type T2: -20℃~+120℃ (OEM) | |
| High temp. type T3: -20℃~+150℃(OEM) | |
| Operation condition | Operating temperature: -20℃~+60℃ |
| Related humidity: 5%~90% | |
| Atmospheric pressure: 86kPa~106kPa | |
| Ingress protection | IP65 |
| Explosion proof | ExdIIBT6 (explosion proof type) |
Order Guide
In addition to regular products, we support customization
| SI-3207- | Note | ||||||||
| Diameter | DNXX | DN2~DN300mm | |||||||
| Converter Type | N1 | 24VDC,Pulse output,No display | |||||||
| N2 | 24VDC,Pulse output,No display,EX | ||||||||
| A | 24VDC,4-20mA output,No display,EX | ||||||||
| E1 | Battery power supply,No output,Digital display,EX | ||||||||
| E2 | 24VDC,Pulse and 4-20mA output,RS485,Digital display,EX | ||||||||
| E2+B | 24VDC+battery power supply,Pulse and 4-20mA output,RS485,Digital display,EX | ||||||||
| E3 | 24VDC,Pulse and 0-20mA output,RS485,Digital display,EX | ||||||||
| E3+B | 24VDC+battery power supply,Pulse and 0-20mA output,RS485,Digital display,EX | ||||||||
| E+H | 24VDC,4-20mA output,HART,Digital display,EX | ||||||||
| G5 | 220VAC,Pulse and 4-20mA output,RS485,Digital display,EX | ||||||||
| G6 | 220VAC,Pulse and 0-20mA output,RS485,Digital display,EX | ||||||||
| Accuracy | 10 | ±1.0%R | |||||||
| 5 | ±0.5%R | ||||||||
| Flow Range | S | Standard Range | |||||||
| E | Extended Range | ||||||||
| Body Material | S4 | SS304 | |||||||
| S6 | SS316 | ||||||||
| Explosion-Proof | BT | Exd II BT6 | |||||||
| NA | None | ||||||||
| Connection | THM | External thread,Apply to DN4~DN50mm | |||||||
| THF | Internal thread,Apply to DN4~DN50mm | ||||||||
| WAF | Flange clamp | ||||||||
| DXX | D16:DIN PN16 Flange;D25:DIN PN25 Flange | ||||||||
| AXX | A15:ANSI 150# Flange;A30:ANSI 300# Flange | ||||||||
| JXX | J10:JIS 10K Flange;J20:JIS 20K Flange | ||||||||
| Temperature | T1 | -20~+80℃ | |||||||
| T2 | -20~+120℃ | ||||||||
| T3 | -20~+150℃ | ||||||||
SI-3207 DN50 E2 10 S S4 BT D16 T2
① ② ③ ④ ⑤ ⑥ ⑦ ⑧
① Diameter:DN50
② E2:24VDC,Pulse and 4-20mA output,RS485,Digital display,EX
③ 10:1.0% of rate accuracy
④ S:Standard range 4-40m³/h
⑤ S4:SS304 Body Material
⑥ BT:Exd II BT6
⑦ D16:Flange DIN PN16
⑧ T2:-20~+120℃
Applications
Liquid turbine flow meters are widely used in various fields due to their high accuracy and reliability:

- Petrochemical Industry: Used for measuring various oils and chemical liquids, such as crude oil, gasoline, diesel, and chemical solvents.
- Food and Beverage Industry: Used in food and beverage production to measure the flow rate of liquids such as syrups, milk, and juices.
- Water Treatment: Used to control water flow in tap water and sewage treatment processes to ensure the rational use of water resources.
- Pharmaceutical Industry: Used for flow monitoring in pharmaceutical production processes to ensure liquid flow control during production.
Case Study: Semiconductor Ultrapure Water Measurement
We supplied a customer with a requirement to measure ultrapure water with a conductivity of <0.055μS/cm to avoid metal ion contamination. We supplied them with a small-diameter turbine flow meter, using a PEEK turbine and sapphire bearings, and non-contact capacitive sensing technology. This achieves stable measurement with a reading accuracy of ±0.5%. This results in annual savings of 120,000 tons of water used for wafer rinsing.
Techincal Support
Sanitary Flow Meter
Sanitary Flow Meter, also called the tri-clamp flow meter. Sanitary Flow Meters have stainless steel bodies and come standard with Tri-Clover fittings.
Wastewater flow meter
Wastewater Flow meters are flowmeters for water and wastewater treatment. Electromagnetic flow meters are suitable for open channel and underground industrial water pipes. Magnetic flow meters can be Remote type, compact type, insertion type. And ultrasonic flow meters are another choice, if you can not change your pipes. Both ultrasonic flow meters and magmeters are inline flow meters.

SCFM (Standard CFM) vs. ACFM (Actual CFM) and Calculator
Thermal Mass Flow Meter Correction Factor Guide
Analog Gas Flow Meters | Types and Product List
Rotameters: Excellent Choice for Flow Measurement in Various Gases
Flow Meter Selection Guide: Starting from Measurement Conditions

Zhang Wei, possesses 20 years of experience as an automation instrumentation engineer, specializing in the research, design, installation, commissioning, and maintenance of automation instruments.
Face to various instrument communication protocols (such as Modbus, Profibus, etc.), with solid hardware circuit design and software programming skills (proficient in C language and PLC programming). Has extensive project experience; projects he has led and participated in have all achieved outstanding results, improving product accuracy, reducing costs, and increasing production efficiency.
Possesses excellent communication and coordination skills and a strong team spirit, enabling him to quickly respond to customer needs and provide high-quality automation instrumentation solutions.
