Displacement Measurement System For Small Size Vessel Autosamplers & Test Tube Pipette Racks
Air bubble sensor PROBLEMS & SOLUTIONS:
PROBLEM:
The customer desired to profile the surface of a spinning wafer, either shiny or dull (where optical systems failed) using a series of four/six sensors with maximum accuracy and resolution. An additional sensor would be needed for the detection of the wafer presence or absence to prevent damage to the remainder of the system should the wafer disengage in whole or in part from the spinning mechanism. There was also a need for a custom mode where the customer could enter in an acceptance band in which the reading from one or more selected sensors needs to be in. Otherwise a relay would be set to halt the process. All measurements need to be made from .5” to 1.0” from the face of the transducers.
SOLUTION:
Cosense’s developed a multi-channel microlevel measurement board which could handle up to twelve sensors and would provide an accuracy of +.0005” and a resolution of +.0001” at constant temperature. The ultrasonic sensors were custom built to provide a deadband of less than .5”. Data would be delivered via RS-232 for the active channels during regular run mode. In the custom mode, the unit samples the wafer at maximum update rate and data is delivered only when a reading outside the acceptance band is encountered.
PRINCIPLES & OPERATION:
GENERAL
The LL-1101 / SL-1105 / LL-1501 series is an extremely versatile instrument. It’s
many standard programmable features and available options can be utilized to
perform a wide variety of control functions. In many cases, a single unit can
accomplish control functions which would otherwise only be possible through the
use of multiple instruments or expensive computer based systems.
STANDARD FEATURES
1. Automatic temperature compensation compensates for sound velocity errors
(due to temperature variations) over the entire sensor temperature range.
2. Simple 2 button programming.
3. Four programmable Alarm point relays.
4. User selectable Height or Distance operating mode.
5. Fully isolated analog output with programmable output offset.
6. Three “Lost Echo” condition modes (user selectable).
7. Internal 4-digit display provides programming prompts, system “heartbeat”,
and “Lost Echo” feedback.
8. Enhanced noise rejection algorithm ignores spurious signals and other noise
sources such as 60 cycle and RFI.
OPTIONAL FEATURES
1. External (front cover mounted) 4 digit display for local indication.
2. Optional “Lost Echo” alarm relay, in place of alarm relay 1.
3. Customized response times and output damping to meet special application
requirements. Call factory for application assistance.
Need to know more about our
Precision Measurement solution? Click here:
To Download Spec Sheet for Air bubble detector click here;
For other solutions not related to Air bubble detector please visit us by clicking here:
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 |
Displacement Measurement Features with the ML Series |
| |
Operating Range: 0.5" - 6" (12mm-153mm) |
| |
Vessel / tube opening (diameter) as small as 1/8" (3.2mm) |
| |
Non-contact, ultrasonic operation eliminates contamination of sample media, while maintaining high system throughput |
| |
No calibration or special installation requirements |
| |
PC Compatible |
| |
Measurements are not affected by liquid color, density, opacity |
| |
Fast response time - Programmable |
| |
Standard Accuracy ±0.1mm (±.005") |
| |
ML-101/102/104 |
| |
Greater Accuracy ±0.1mm (±.005") |
| |
Higher Accuracy ±0.005mm (±.0002") |
|
