d-Micro Geotechnical Crackmeter
The d-Micro is a Yieldpoint eddy-current crackmeter that outputs displacement in microns and temperature in degrees Celsius directly, avoiding the need for external analog-to-digital conversion, for monitoring cracks in structures such as buildings, bridges, dams, tunnels and mine workings.
- Range
- 10 mm; temperature -40 to 125 °C
- Output
- RS485 (9600,8,N,1) ASCII-encoded: instrument ID, sensor type, temperature and displacement data
- Core technology
- Eddy current transducer with digital temperature sensor
Overview
In detail
How it works
The d-Micro uses an eddy current transducer with a digital temperature sensor, outputting an RS485 (9600,8,N,1) ASCII-encoded signal comprising a unique instrument ID, sensor type, temperature and displacement data. Readings can also be taken over USB from a laptop or tablet using SensorViewer, logged long-term with low-power dLoggers, or networked in minutes with other YieldPoint instruments via the IoT Gateway or d-Mesh.
Installation
The d-Micro can be easily installed and removed from all types of structures using corrosion-proof nylon connectors.
Applications
Used for monitoring individual or interface cracks in structures, cracks in underground mine lunch rooms and garages, parking garages, dams under rehabilitation, residential structures subject to blast or fracking vibration, bridge-deck behaviour, and pillars and posts.
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Specifications
Technical specifications
- Range
- 10 mm; temperature -40 to 125 °C
- Core technology
- Eddy current transducer with digital temperature sensor
- Output
- RS485 (9600,8,N,1) ASCII-encoded: instrument ID, sensor type, temperature and displacement data
- Display resolution
- 1 mm with handheld readout
- Display linearity
- Typically 0.5% F.S.
- Accuracy
- Better than ±100 mm absolute or ±50 mm relative, as stated in source (unit unconfirmed — see notes)
- Temperature coefficient
- < 0.02% FS/°C (0-50 °C)
Related
Often specified alongside
ESS Earth
Resistance Wire Extensometer RWE
- Application
- Underground hard rock and coal mine displacement monitoring
- Monitoring points
- Pillars, stope walls, roof
Geosystems
JM Series Vibrating Wire Jointmeter
- Range
- 25, 50, 100, 150, 200, 250, 300 mm (200/250/300 mm not available for JM-E)
- Accuracy
Ready to specify?
Add d-Micro Geotechnical Crackmeter to your enquiry
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