Atrato Inline Low-Flow Flowmeter

The Atrato inline low-flow flowmeters utilize patented technology, which enables it to operate with excellent accuracy over very wide flow ranges across the whole span. It is a genuine breakthrough in flowmeter technology! Its rugged, clean bore construction makes the Atrato ideal for a whole range of low flow applications, from setups for research, to industrial installations and applications for chemically challenging liquids.

The Atrato is a low-flow sensor that can handle low flows from laminar to turbulent and is largely immune from viscosity. It has excellent:

• Turndown
• Repeatability
• Linearity
• Accuracy that is better than ±1.0% of reading.

The USB interface on two of the three versions permits the user to directly monitor the rate and total on their laptop while also altering some of the operating parameters, such as the pulse resolution and units.

The Atrato System

The Atrato system of low flow meters uses the well-proven time of flight measuring method, which is far more reliable and accurate than Doppler shift measurement, wherein, reflected signals are required from irregularities in the liquid. The strong radial ultrasonic signal sends symmetrical pulses directly into the tube; the sound travelling down the pipe can be considered as a plain wave. The signal to noise ratio is remarkable, as there is little background noise and high signal strengths. As the system is fully balanced at zero flows, the two signals are identical and cancel each other out. This gives a very stable zero flow condition and is the basis of the flowmeter’s high-ratio between minimum and maximum flows. As the flow increases, these signals go out of phase, and this phase shift is measured to an accuracy equivalent to 250 picoseconds. In addition, the sound waves travelling down the tube in the Atrato operating system are symmetrical, and as a result, any changes in the fluid’s velocity profile across the pipe diameter will be averaged out by the signal as it passes from the transmitter to the receiver. It is therefore irrelevant whether the fluid velocity profile is fully formed with turbulent flow or completely laminar with a classic parabolic profile. In practice, this gives the Atrato an excellent immunity to Reynolds number changes and a good high viscosity performance.

Ultrasonic MetraFlow

Chemical Inert Low Flow Ultrasonic Inline Liquid Flowmeter Atrato MetraFlow Series 240

Specifications

• Two flow ranges:
  • 0.02 – 1.00 l/min (0.32 – 15.85 gph)
  • 0.10 – 5.00 l/min (1.585 – 79.25 gph)
• Accuracy:
  • ± 1.0% of reading at calibration temperature; standard at 20 °C (68 °F)
  • ± 0.5% FSD for all other
• Repeatability: ± 0.1% + 0.02% FSD
• Flow tube: one piece chemical inert Perfluoroalkoxy (PFA); ID 1/8″ and 1/4″
• Supply voltage: 10 – 24 Vdc or USB 5 Vdc with limited capability
• Turn-down minimal 50 : 1
• Temperature rating: -10 – +60 °C (14 – 140 °F)
• K-factor adjustable; max. considering flow and frequency
• Pressure rating: depends on tube size and temperature max. 2770 kPa (400 psi)
• Outputs:
  • NPN (nFET) and PNP (pFET)
  • 0 – 5 / 10 V or 4 – 20 mA – scalable
  • USB interface for configuration and monitoring
• Liquid crystal display
• Process connections, 200 mm tube tails
• Electrical Connections: 8 conductor 1 meter (3 ft) cable, flying leads
• Immune for changes of fluid velocity profile and Reynolds number
• No moving parts or obstructions
• Configuration and monitoring software included

Pulse Converter Pulsite Link

Analog and Pulse Converter for Atrato 70P Pulsite Link​

Specifications

• Pulse input from Atrato Series 70P of other pulse flowmeter
• Inputs: PNP, NPN or Reed Switch
• Outputs: 4 – 20 mA (active), 0 – 5/10 Vdc and NPN
• +5 Vdc auxilliary supply for flow meter
• Programmable settings and linearization
• USB interface and standard software
• Configurable flow alarm outputs
• Protection class IP64
• Power supply 15 – 24 Vdc

Please note: Manual data files can be quite large, please be patient while downloading.
The manuals are for information purposes only and shouldn’t be used for operating the instrument