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Building Intelligence
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Displacement Sensor
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Different grade displacement sensors have been certified to be used with SMT's data acquisition and monitoring equipment.
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Overview
General Description
Depending on the desiredresolution and travel to be monitored, the following sensors are available:
Model 404 BI Technologies
Spring return linear actuation conductive plastic position sensor.
- Structural Beam Travel
- Construction material shrinkage and movement
Series 350 LVDT Transtekinc Displacement Sensor
DC Gaging LVDT - Spring loaded spindle with precision linear variable differential transformer. Designed for excellent linearity and high sensitivity.
Typical Applications
- Stucco or masonry crack monitoring
Features
Model 404 Resistance Based Sensor
- 0.5 inch travel, linear motion with spring
- Accurate position feedback
- Low cost
- Compact design for small spaces
- Conductive plastic technology
- Long life - 5 million actuations
- 8 sensors per SMT Industrial WiDAQ
Seires 350 Gaging LVDT Sensor
- Working range +/- 0.05 inch (1.27mm)
- Mechanical travel 0.14 inch (3.56mm)
- High sensitivity
- Non-linearity <5%
- One sensor per SMT Industrial WiDAQ
Specs
Model 404 Resistance
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Model 404 Electrical Characteristics |
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Resistance Range |
1KW to 150KW |
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Standard Resistance Tolerance |
±10% |
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Minimum Practical Resistance Tolerance |
±5% |
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Independent Linearity |
±1% |
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Minimum Practical Independent Linearity |
±0.5% |
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Input Voltage, Maximum |
400VDC |
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Power Rating |
0.25W at 70ºC |
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Dielectric Strength |
1000V rms |
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Insulation Resistance, Minimum |
1000MW |
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Actual Electrical Travel, Nominal |
0.50” ± 0.15 |
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Resolution (with WiDAQ) |
0.003” (0.085mm) |
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Temperature Coefficient |
-800 ppm/ºC |
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Environmental (MIL-R-39023) |
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Operating Temperature |
Static -55° to 125°C |
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Load Life |
1 million full |
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Mechanical |
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Total Mechanical Travel |
0.56” ± 0.015” |
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Actuating Force, Maximum |
14 oz |
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Backlash, Maximum |
0.03” |
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Static Stop Strength |
20 lb |
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Body Style |
Rectangular |
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Termination Style |
Turret Terminals |
Model 350 LVDT
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Series 350-0010 Electrical Characteristics |
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Nominal FS Output (5V Input) |
±1VDC |
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Linearity |
±0.5% |
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Output Impedance |
2500W |
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Resolution (with WiDAQ) |
0.00005” (0.00127mm) |
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Environmental |
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Operating Temperature |
-54° to 93°C |
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Mechanical |
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Working Range |
±0.05 inch (1.27mm) |
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Mechanical travel |
0.14 inch (3.56mm)
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Connector |
MS3101A-14S-5P. |
Mounting
Model 404 Resistance
Flange mounts for insertion into insulation panels. Custom mounts can be made to fit specific applications.
Model 350 LVDT
Example of mount secured to masonry. Used for monitoring crack expansion and contractionIP54 rated enclosure or seal required to be placed over assembly.
Connectivity
Model 404 Resistance
Industrial WiDAQ. (8 Resistance Channels)Wire resistance pairs to channels 17 to 24.
LVDT Connectivity
Industrial WiDAQ ConnectivityConnect to WiDAQ expansion board differential voltage input.
MS3101A-14S-5S required to interface to LVDT connector.
- Polarity must be observed for proper function. Reversal will not damage the unit.
- For best accuracy, recalibrate with designated WiDAQ.
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SMT Research, LTD. | 200-75 W Broadway | Vancouver, BC | V5Y 1P1