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Litre Meter secures new contract and customises flowmeter

Litre Meter has secured a new contract with a US manufacturer of precision agricultural spraying systems for meters to be used in a new range of high-tech equipment.

The company says it is unable to name its customer for its latest contract because of the confidential nature of the current product development work.

The business has been based on the supply and continued development of Litre Meter's Pelton Wheel flowmeters. These meters are accurate and versatile and can be used to measure a variety of low viscosity materials at both low and high flow rates.

Litre Meter's standard LM220 meter has a flow range of 0.1 to 28 litres per minute (l/min) and is pressure rated to 2bar at 70°C. The meter also has a +/-2% accuracy and +/- 0.2% repeatability over the top 90% of its range. For this client, a custom version was developed with the following upgrades:
• All welded stainless steel construction
• 0.25" male NPT threads
• Reduced frequency output (internal divide by 10 function)
• 30bar pressure rating
• 5V DC operation
• Tropical testing.

Testing regimes included heat soaking the flowmeter and its housing at 85°C for two hours followed by immersion in two feet of water for a further two hours to test for fluid ingress. The meters were extensively redesigned to meet the standards of these tests.

LM Pelton Wheel flowmeters use a single-size, straight bladed rotor manufactured from chemically resistant PFA with sapphire bearings. These bearings run in hemispherical sapphire bearing cups which form a 'floating', low friction, precise unit. The motion of sealed ferrites mounted within the tips of the rotor is monitored and read by a bespoke sensor.

SOURCE: Litre Meter