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TruFlo Sample Monitor

TruFlo Sample Monitor
TruFlo Sample Monitor
  • Continous real-time flow measurement
  • Eliminates guess work
  • Sounds an out-of-range alarm
  • Reduces sample repeats
  • Ideal for sample introduction by peristaltic pump or natural aspiration
  • Suitable for all ICP-OES and ICP-MS models

Do you ever need to repeat the analysis of a sample due to...

  • A blocked nebulizer?
  • Worn peristaltic tubing?
  • Incorrect pressure of the pump tubing clamp?

With the digital display of the TruFlo Sample Monitor, you always know the actual rate of sample uptake to your nebulizer. This enhances the day-to-day reproducibility of your results and reduces the need to repeat measurements due to a blocked nebulizer, worn pump tubing or incorrect clamping of the pump tube. And the borosilicate glass sample path ensures that there is no memory effect or sample contamination. The TruFlo can even sound an alarm if the sample uptake is outside your specified limits.

The TruFlo is also ideal if you are relying on the natural aspiration of the nebulizer. Many operators, particularly of ICP-MS, use natural aspiration in order to eliminate the effect of peristaltic pump noise from their measurements. With the TruFlo, you always know what your sample uptake is and you can take immediate corrective action if there is any change. You can also record your sample flow so that you can check that you are using the same flow from day to day.

The actual sample flow is shown on the TruFlo's inbuilt digital display and a graph of the flow versus time can also be displayed on your computer.

TruFlo Sample Monitor

You can set the upper and lower limits of your acceptable sample flow range.

TruFlo Sample Monitor

You can receive a warning on the screen, as well as an audible alarm, if the sample flow moves outside the acceptable range. This can happen if the flow is restricted due to a blockage or a leak. It can also occur when the pump tubing wears out. Pump tubes are often replaced either too early or too late.

TruFlo Sample Monitor

You always know the actual sample flow and you do not need to worry about converting pump revolutions to sample flow.

TruFlo Sample Monitor

The realtime flow display enables you to optimise the pressure on the peristaltic pump tubing, helping you to maximise the tube life and improve analytical precision. Too much pressure will result in faster tube wear and more noise. Too little pressure may result in irregular flow. In the above display the clamp was tightened by a half turn at each arrow.

TruFlo Specifications

Flow sensor
non-invasive thermoelectric sensor
Calibrated flow range
The TruFlo can be used at sample flows below the calibrated minimum with very good repeatability but the accuracy may be outside the specified range.
Calibration solution
The TruFlo is effective in identifying any change in sample flow with non-aqueous solutions, even though the absolute accuracy of the flow reading may be outside the specified range.
Accuracy of flow reading
+/-5% error (with deionized water, within calibrated flow range).
Weight
300g
Size
100 x 40 x 60mm

TruFlo Ordering Information

AWPart Number Measurable Flow Range (ml/min) Calibrated Flow Range (ml/min) Internal Volume (ml) Sample Path
70-803-0643 0 - 4.0 0.2 - 4.0 0.12 Borosilicate glass + PEEK
70-803-0788 0 - 1.0 0.03 - 1.0 0.055 Borosilicate glass + PEEK
70-803-0774 0 - 0.05 0.001 - 0.050 0.033 Quartz + PEEK
70-803-0890 0 - 4.0 (for HF) 0.2 - 4.0 0.12 HF Resistant
70-803-0891 0 - 1.0 (for HF) 0.03 - 1.0 0.055 HF Resistant 
70-803-0892 0 - 0.05 (for HF) 0.001 - 0.050 0.033  HF Resistant

The TruFlo is normally calibrated for aqueous solutions. With non-aqueous solutions, it can be reliably used to detect any change in the sample flow, but the actual flow reading will not be correct. If you routinely run non-aqueous solutions you can order a TruFlo calibrated for your specific application. When you order the TruFlo, simply add part # 70-TFCAL (TruFlo calibration service). You will need to specify what solution you are using and the TruFlo will be supplied pre-calibrated for your solution.

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