Company Profile

Blue White F300 Flow Meter: Pitot Tube Inline Pipe Volumetric Indicators

Quick Answer: The Blue White F300 is an inline pitot tube flow meter for volumetric flow of clean water and compatible chemicals. It fits pipe sizes from DN25 to DN200 and offers direct visual reading plus optional 4-20 mA or pulse output. Silver Automation Instruments supplies the F300 and integrates it into dosing skids, cooling loops, and RO feed lines across Southeast Asia, the Middle East, and Latin America.

How the F300 Pitot Tube Meter Operates

The body is machined from polysulfone, a tough transparent plastic. You can see the float and the scale without any power. Fluid enters and splits around a fixed pitot tube. This creates a differential pressure that lifts the float. Higher flow pushes the float further up. No moving seals, no bearings, no gears. In practice, that means almost zero maintenance on clean water lines. We have seen sugar mills in Thailand install the F300 on cooling water return pipes only because the operator wants a quick glance reading during each shift. The design is simple and that is why plant engineers trust it.

Most engineers skip the theory and go straight to the scale. The scale is printed directly on the polysulfone body in GPM and LPM. The float edge acts as the indicator. Accuracy is plus or minus 5 percent of full scale. This is typical for a variable area pitot meter. If you need high precision custody transfer, this meter is not the right tool. But for process monitoring and dosing confirmation, it does the job well.

Typical Industries and Applications

Here is the thing. The F300 works best with water like fluids. Reverse osmosis feed water, cooling tower makeup, chiller loops, and irrigation lines. It also handles diluted chemicals. Sodium hypochlorite up to 10 percent, aluminum sulfate, 10 percent sulfuric acid, and 10 percent caustic soda. Do not push it with solvents, acetone, toluene, or oils. The polysulfone body will crack. Last year a paint manufacturer in Vietnam connected the F300 to a toluene line and the body failed within two days. Stick to aqueous solutions.

Common sectors include water treatment, food and beverage, metal finishing, and fertilizer injection. In the Middle East we supply the F300 for desalination plant chemical dosing. In Nigeria we ship units for cooling water monitoring on gas processing sites. The meter can handle pressure up to 10.3 bar at 21 degrees C. For warmer fluids the pressure rating drops. Maximum temperature is 54 degrees C. That covers most ambient water systems worldwide.

Key Specifications and Wetted Materials

Pipe sizes range from DN25 to DN200 with NPT or BSP threads. The DN25 unit covers 1.9 to 19 L/min. The DN200 model spans 75 to 757 L/min. Wetted parts are polysulfone, 316 stainless steel spring, and O-rings in Viton or EPDM. Choose EPDM for sodium hypochlorite and caustic. The meter comes in three output versions. Visual only with no electronics. Reed switch pulse for batching or totalising. Two-wire 4-20 mA transmitter for PLC or SCADA. The transmitter needs 12 to 24 VDC loop power. The electrical enclosure carries a NEMA 4X rating.

Silver Automation Instruments stocks all three output types. We help you pick the right O-ring material for your chemical mixture. A water treatment plant in Ecuador recently ordered 12 F300 units with EPDM and 4-20 mA output for their sodium hypochlorite dosing lines. The meters mounted directly on the injection skids and gave the operators real-time visibility without extra transmitters.

Installation and Pipe Run Requirements

Mount the F300 vertically with flow going upward. You need a straight run of ten pipe diameters upstream and four diameters downstream. If you have an elbow, a pump discharge, or a partially open valve closer than that, install a flow straightener. Otherwise the f