The Baker Hughes Panametrics DigitalFlow DF868 from HMA Instrumentation is a full-featured, fixed-installation liquid flow meter designed to meet all flow metering and energy measurement needs. Its patented Correlation Transit-Time digital signal processing provides drift-free measurements in ultraclean and most ‘dirty’ liquids. This includes fluids with gas bubbles and entrained solids that previously required Doppler-type meters.

Using clamp-on flow transducers, the DigitalFlow DF868 from HMA Instrumentation measures flow rate through metal, plastic or even concrete-lined pipes without penetrating the pipe wall. To hold clamp-on transducers in place, a variety of clamping fixtures are available to accommodate different pipe sizes, transducer types and attachment methods (for example, chain, wire rope, Velcro strap or a magnetic, bolt-on or weldable steel yoke with metal band). The universal clamping fixture includes ruled slide tracks to simplify transducer spacing for accurate flow measurements. There is even a special small-pipe clamping fixture with miniaturised transducers to simplify flow measurement on 15 mm to 50 mm lines.

Another feature that makes the DigitalFlow DF868 from HMA Instrumentation meter such a powerful and versatile flow meter is the energy measurement software included in every meter. Optional RTDs and input boards extend the benefits of ultrasonic flow measurement to energy measurement. Benefits include measurement of flow and temperature without pipe penetration and compatibility with pipes from 25.4 mm to 5 m in diameter. The DigitalFlow DF868 from HMA Instrumentation measures energy flow in water and water/glycol heating and cooling systems with temperatures from –20°C to 210°C.

To ensure compatibility with existing or preferred temperature instrumentation, the DigitalFlow DF868 from HMA Instrumentation is available with three analogue input boards. The analogue input board provides 24 V DC loop power and two isolated 4 to 20 mA inputs for transmitters. For applications requiring direct RTDs, the RTD input board provides two isolated, three-wire RTD inputs for temperatures from –100°C to 350°C.

Applications:

• Water and wastewater
• Hot and chilled water
• Water and glycol solutions
• Refined hydrocarbons
• Petroleum products
• Crude oil
• Lubricating oils
• Diesel and fuel oils
• Solvents
• Chemicals
• Other liquids

Features include:

• Economical, non-intrusive flow measurement
• Hazardous (classified) location certification
• Simple set-up and installation
• Suitable for a wide range of pipe sizes and materials
• Two-channel and two-path version available
• Energy measurement option
• Large backlit LCD display
• Velocity, volumetric and energy flow rates
• Totalised flow and trend data