Precision Electronic Volume Measurement - digiflume
Automate Your Burette Measurements
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The measurement of fluid volumes collected during experiments is one of the few remaining manual tasks in the laboratory. Now you can discard graduated cylinders and drainage burettes, and use digiflume to make measurements automatically from your desktop PC. The device comprises a linear liquid level measurement electrode in a detachable cylindrical housing and associated electronics. Choose from 10 ml, 20 ml, 50 ml or 100 ml barrels. digiflume has a design pressure rating of 700 Bar (10,000 psi) and will therefore find extensive use in geophysical laboratories, or indeed any other application where accurate fluid volume measurement is needed. Wetted parts are AISI 316 stainless steel, fluorocarbon and Viton. The device can be calibrated for operation with any compatible fluid, or even a combination of two non-miscible fluids. For more aggressive fluids, digiflume can be made in other materials to special order. The electronics are in a sturdy cast aluminum housing, which serves as a rigid base for the device. The measured volume is shown on an integral LCD display, allowing stand-alone operation. Calibration is straightforward and performed with a piston burette and the software provided. RS485 serial communication is standard, permitting up to 32 devices to be connected to one PC. |
Specifications
| Standard Volumes1 | 10, 20 or 50 ml (100 ml available at reduced operating pressure) |
| Resolution | 1 x 10-6 liter |
| Repeatability | +/- 0.05% F.S. at constant temperature |
| Accuracy2 | +/- 0.25% F.S. |
| Operating Temperatures3 | +5 degrees C to 45 degrees C (41 degrees F to 113 degrees F) |
| Maximum Operating Pressure | 700 Bar (10 kpsi) |
| Power Supply | 8-12 VDC |
| Current Consumption | 300 mA maximum |
| Weight | 3.1 kg |
| Dimensions | 110mm x 200mm x 365mm (WxDxH), excluding connectors |
| Communication | RS485 half duplex, multi-drop |
| Fluid Inlet | 1/16" HPLC (Use Swagelok SS-1F2-1GC nut and SS-100 ferrules) |
| Outlet | 1/16" or 1/8" Swagelok tube fitting |
| Note: 1. Intermediate barrel sizes to customer specifications and larger volumes (at reduced pressure rating) on special order. 2. Basic initial accuracy including non-linearity for aqueous solutions at 20 degrees C. Operational accuracy will be determined by user calibration. 3. A four wire PTR incorporated in the sensor permits full temperature compensation. |
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digiflume Users Manual (in PDF format 841 KB)
