Relative Displacement Measurement System For Small Size Vessel Autosamplers & Test Tube Pipette Racks
Relative Displacement Measurement PROBLEMS & SOLUTIONS:
PROBLEM:
High temp/high pressure vessel made it difficult to measure continuous level.
SOLUTION:
Cosense model ML-101 bottom-up is a continuous liquid level transmitter system consisting of a single 316SS sensor and a level transmitter of the right gauge or tank, where it transmits an ultrasonic pulse through the liquid. The signal if reflected back to the sensor by the liquid/air interface. A clean, well define liquid/liquid interface can also be detected and monitored continuously.
PRINCIPLES & OPERATION:
CONTACT MODELS
Follow the instructions below:
1. Drill a suitable hole in the vessel or pipe wall and tap for 3/4” NPT. If this
walled vessel or material is not suitable for threading, weld or braze a bushing
to accept the sensor.
2. Screw the sensor in the threaded section and make sure that there is a good
seal. Use a pipe compound or sealing tape compatible with the materials and
avoid excessive tightening.
3. Run the power and control wiring cable to the electronic control unit.
Observing all applicable electrical codes and proper wiring procedures.
CONTROL UNIT
Refer to the typical installation diagram and control unit dimensions when
installing the control unit. Follow steps 1 and 2 below for remote mounted electronic
units. Steps 3 through 7 are common for both the integral electronic units
and remote electronic units.
1. Mount the remote control unit on any suitable wall, panel, etc. making sure
there is adequate clearance for wiring.
2. Remove the PC board by removing the screws. Drill a suitable size hole in the
control unit housing for a conduit fitting (if so required).
3. Remove the cover from housing. To complete wiring, either leave or remove
the electronics printed circuit board in the housing on remote units and
remove the encapsulate electronics in integral units.
CAUTION: Never remove unit from a vessel with power and/or output
control cables connected to the electronic control unit inside the housing
to avoid cable damage.
4. Wire the unit as desired. Refer to the wiring diagram inside the cover.
Note: All wiring, conduit and fittings should conform to local electrical
codes. In a hazardous location, a conduit seal should be installed within
18 inches of the control unit housing. Use a drain seal in vertical conduit
run to prevent condensation from entering the control unit. COSENSE
assumes no responsibility for improperly wired units.
5. Replace the printed circuit board, if removed, or the encapsulated electronics.
Make certain that the wires are dressed carefully to prevent pinching between
the cover and the housing.
6. Replace the housing cover.
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For Further Information on Air-in-Line Contact Your Nearest Cosense Representative By Calling (631) 231-0735 or email us at sales@cosence.com
Untitled Document
COSENSE PRODUCTS |
Air-in-Line Features with the ML Series |
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Operating Range: 0.5" - 6" (12mm-153mm) |
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Vessel / tube opening (diameter) as small as 1/8" (3.2mm) |
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Non-contact, ultrasonic operation eliminates contamination of sample media, while maintaining high system throughput |
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No calibration or special installation requirements |
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PC Compatible |
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Measurements are not affected by liquid color, density, opacity |
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Fast response time - Programmable |
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Standard Accuracy ±0.1mm (±.005") |
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ML-101/102/104 |
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Greater Accuracy ±0.1mm (±.005") |
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Higher Accuracy ±0.005mm (±.0002") |
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