A Flowmeter for Every Need
Agilent offers flowmeters for measuring capillary column flows, calibrating air pumps and flow controllers, and verifying instrument gas flows.
Setting and maintaining GC flow rates greatly affect the instrument accuracy and sensitivity. Choosing a flowmeter for your application depends upon measurement speed, ease of use, accuracy and flow rate range.
Agilent offers a flowmeter recalibration and repair program.
Measurement Speed
Agilent offers two types of flowmeters: volumetric flow meter (ADM series) and mass flowmeter (Precision Gas Flow Meter).
Volumetric measurements rely upon the volume of gas passing through the flowmeter but not the composition. Additionally, volumetric flowmeters accurately measure from a mixed or multi-component gas stream. Mass flowmeters are calibrated to specific gas compositions and determine the flow rate for those calibrated gases. Mass measurements are independent of temperature and pressure.
With volumetric flowmeters, no adjustments are needed when switching from one gas stream to a different composition stream. So, an analyst can immediately change from measuring nitrogen from a GC detector to helium split rate from an injection port, to methane from an anaerobic digestion vessel. If a mass flowmeter is used, the analyst must change instrument settings and purge the flowmeter of the initial gas before accurate readings can be taken.
Ease of Use
When setting gas flows with many flowmeters, the analyst often needs more than two hands to hold and start the flowmeter. With continuous flow readings, the analyst does not have to start or stop the flowmeter with each measurement. The ADM flowmeters read flow values continuously.
Accuracy
Agilent accurately calibrates all flowmeters to NIST-traceable standards.