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Quick Answer: Silver Automation Instruments supplies compact vane and turbine liquid flow sensors for internal machinery in DN4 to DN25 line sizes. These pickups cover 0.05 L/min to 50 L/min and output pulse or 4-20 mA signals. Send your fluid type, viscosity in cP, pressure in bar, temperature in °C and pipe size DN to get a quote.
These are inline liquid flow sensors. A small vane wheel or turbine rotor sits in the flow path. The rotor moves with the liquid. A magnetic pickup or Hall sensor reads the rotor speed. The signal goes to a PLC, display or engine control unit. This is different from a full bore electromagnetic flowmeter. These compact sensors go where space is tight inside machine frames.
Line sizes from DN4 to DN25 cover most internal cooling, lubrication and fuel loops. Standard connections are G1/4, G1/2, G3/4, 1/4 NPT and 1/2 NPT. Flow ranges go from 0.05 L/min up to 50 L/min for water like liquids. Viscosity range is 0.8 cP to 100 cP for turbine bodies. Some vane versions handle up to 500 cP. Accuracy for the turbine pickup model SIT08 is ±0.5 percent of reading from 10 percent to 100 percent of range. Vane pickups run at ±1 percent full scale. Repeatability is better than 0.2 percent in most cases.
Pressure and temperature ratings depend on body material. Brass bodies handle 100 bar at 80 °C. 316L stainless steel bodies handle 200 bar at 120 °C. PPS and PTFE bodies work in chemical metering up to 10 bar and 60 °C. Seals are FKM, EPDM or PTFE. Output options are NPN pulse, PNP pulse, 5 to 24 VDC square wave, or 4-20 mA two wire. Some models accept 8 to 28 VDC and include a M12 connector. A PT100 RTD output is optional for temperature compensation on fuel and oil lines. ATEX Zone 1 certification is available on 316L turbine pickups for diesel and hydraulic oil service.
CNC machine spindle cooling. A shop in Binh Duong Vietnam installed 14 SIT08 turbine pickups on DN8 coolant loops. Water glycol flows at 2 to 12 L/min. The pickups send pulse signals to the CNC controller. If flow drops below 1.5 L/min the machine alarms before the spindle overheats. This is a simple protection loop.
Hydraulic power units. A mining equipment service company in Antofagasta Chile uses SIV15 vane sensors on DN15 return lines. Oil viscosity is ISO VG46. Pressure runs at 80 bar. Flow range is 5 to 40 L/min. The 4-20 mA output connects to a monitoring panel. Operators see real time oil flow and catch pump wear early.
Diesel generator fuel returns. A power rental company in Lagos Nigeria tested SIT06 turbines on DN6 fuel return lines. Flow is 0.5 to 8 L/min. The sensors handle diesel at 40 °C and 5 bar. Pulse output feeds a fuel consumption monitor. This gives the rental company a clear record of engine runtime and fuel use.
Desalination chemical dosing. A site in Jubail Saudi Arabia uses PTFE body vane sensors on sodium hypochlorite dosing skids. Flow is only 0.05 to 0.5 L/min. Line size is DN4. The chemical eats stainless steel so PTFE and ceramic shafts are required. The pickup outputs a frequency signal to the dosing PLC.
For DN4 to DN6 low flow loops order the SIT06 turbine pickup. It covers 0.05 to 8 L/min with water like liquids. Use PTFE body for aggressive chemicals or 316L for fuel and oil. For DN8 to DN15 machine cooling and lubrication loops the SIT08 is the standard choice. It covers 0.5 to 20 L/min and handles pressures up to 200 bar in 316L. For DN15 to DN25 hydraulic return lines choose the SIV15 vane sensor. It covers 3 to 50 L/min and tolerates small particles better than a bare turbine.
Each model can be ordered with NPN, PNP or 4-20 mA output. Specify thread type and cable length. Standard cable length is 2 m. M12 connector is optional. Most engineers skip custom length unless the panel is far from the machine.
In practice, mount the sensor in a straight pipe section. Keep 10 diameters upstream and 5 diameters downstream. Avoid air bubbles. These pickups measure liquid volume. But trapped air gives false high readings. For low flow loops use a bypass or vent valve. Use shielded cable for pulse signals. Tie the shield to ground at the PLC end only.
Standard models cover 0.05 L/min to 50 L/min across DN4 to DN25. The SIT06 covers 0.05 to 8 L/min. The SIT08 covers 0.5 to 20 L/min. The SIV15 covers 3 to 50 L/min.
Yes. Use 316L stainless steel body with FKM or PTFE seals for diesel and hydraulic oil. Viscosity up to 100 cP is fine for turbine models. Tell us the oil viscosity and working temperature before ordering.
You can choose NPN pulse, PNP pulse, 5 to 24 VDC square wave, or 4-20 mA two wire. Pulse output works for totalizing. The 4-20 mA output works for trending and PLC monitoring.
PTFE and PPS bodies with ceramic shafts handle sodium hypochlorite, acid and caustic dosing. Do not use brass or 316L for aggressive chemical service. Send us the chemical name and concentration.
Send a message with fluid type, viscosity in cP, pressure in bar, temperature in °C, pipe size DN and flow range in L/min. Include your required output and thread type. Our team will reply with a model, price and lead time.
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Send us your pressure in bar, temperature in °C, pipe size DN and flow range. Also include the liquid type and required output signal. We supply compact vane and turbine pickups for OEM machine builders, service companies and end users in Southeast Asia, Australia, Latin America, Africa and the Middle East.
