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AW Lake Flow Meter: Positive Displacement and Turbine Fluid Sensor Specs
Quick Answer: Positive displacement meters like AW Lake gear sensors deliver high accuracy on viscous liquids above 10 cP. Turbine sensors handle clean, low-viscosity fluids up to 5 cP with fast response. Silver Instruments offers direct alternatives with ATEX certification, PT100 temperature compensation, and fast shipment to Southeast Asia, the Middle East, and Africa.
Positive Displacement Sensor Specifications (AW Lake and Similar Models)
AW Lake positive displacement flow sensors use oval gear or gear metering elements. Typical sizes range from DN6 to DN50. Flow rates cover 0.6 L/min up to 250 L/min. Accuracy stays within ±0.5% of reading across a 10:1 turndown. These meters handle fluid viscosity from 1 cP to 1000 cP. Higher viscosity reduces internal slip and improves accuracy.
Materials include 316L stainless steel, aluminum, and PPS with PTFE seals. Process connections are NPT or BSPP threads, plus ANSI or DIN flanges. Temperature rating reaches 150 °C with a PT100 sensor embedded. Pressure rating up to 40 bar. Outputs include NPN pulse and 4-20 mA with HART protocol.
We have direct replacements for these AW Lake sensors. Silver oval gear flow meters deliver identical mounting dimensions and electrical outputs. We add options for ATEX Zone 1 (Ex d) and IP67 housing. A paint plant in Indonesia replaced an AW Lake gear meter with a Silver unit on resin transfer at 130 °C and 800 cP. Accuracy and lifespan matched the original spec.
Turbine Fluid Sensor Specifications
Turbine sensors pick up momentum from liquid flow. AW Lake turbine meters cover 0.35 to 15 m/s flow velocity. Accuracy is ±1% of reading with 0.05% repeatability. They suit clean, low-viscosity fluids under 5 cP: water, light fuels, solvents, and chemicals. Operating temperature spans -40 °C to 120 °C. Pressure rating up to 50 bar. Pipe sizes from DN10 to DN200.
Standard output is frequency pulse. Optional 4-20 mA with HART and PT100 for temperature compensation is available. Materials include 316 SS body and tungsten carbide bearings. Process connections: threaded, flanged, or tri-clamp. We have seen many sites where turbine sensors on condensate return lines fail early because of flash steam. In practice, an oval gear meter handles mixed-phase flow better.
Last year a customer in Vietnam asked us to replace an AW Lake turbine sensor on a diesel bunkering system. They needed Pt100 compensation and Modbus RTU output. Silver Instruments supplied a matching
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When to Use Positive Displacement or Turbine
If fluid viscosity is above 10 cP, use a positive displacement meter. The gear design captures liquid pockets and ignores turbulence. If the fluid is thin and clean, a turbine sensor gives lower pressure drop and higher maximum flow. Many engineers choose a turbine for water and chemicals because they are simple to clean. For paints, resins, oils, and thick syrups, use oval gear.
We also supply Coriolis mass flow meters for multi-parameter measurement without viscosity errors. But for direct AW Lake replacement, positive displacement and turbine are the right fit.
Ordering a Flow Meter from Silver Instruments
Tell us your fluid name, viscosity, temperature, pipe size, and flow range. We send a model number and price within one working day. For hazardous areas, mention your zone classification. We provide ATEX, IECEx, and EAC versions. Output options: 4-20 mA HART, pulse, Modbus RTU, and wireless GSM.
Contact Silver Automation Instruments:
Tel: +86-135-1213-1526
WhatsApp: 86-135-12131526
WeChat: +86 13512131526
Website: flow-meter.com.au
Send us your pressure (bar), temperature (°C), pipe size (DN), and flow range. We ship to Australia, Indonesia, Thailand, UAE, Saudi Arabia, Mexico, Nigeria, and more.
Frequently Asked Questions about AW Lake and Silver Flow Meters
Q: What is the maximum viscosity an AW Lake positive displacement meter can measure?
A: Standard AW Lake gear sensors handle up to 1000 cP. Silver oval gear meters with tungsten carbide bearings extend to 5000 cP at 150 °C.
Q: Can a turbine sensor work with hot water at 90 °C?
A: Yes, AW Lake turbine sensors operate up to 120 °C. Ensure the bearing material and pickup coil are rated for high temperature. Silver offers a PT100 option to compensate density changes.
Q: Do you offer ATEX certified positive displacement meters for Zone 1?
A: Silver Instruments provides Ex d (flameproof) and Ex ia (intrinsic safety) versions for ATEX Zone 1 and IECEx. We ship with certificate.
Q: What is the typical delivery time to the Middle East?
A: Standard models ship in two weeks. Custom flange or PT100 units take three to four weeks. We use DHL and FedEx to UAE, Saudi Arabia, and Qatar.
Q: Can I get a turbine flow meter with Modbus output instead of pulse?
A: Yes, we integrate an RS485 Modbus RTU converter directly on the sensor head. Ask for the Silver TRX series.