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biaxial tiltmeter
The JMZX-7100L sliding inclinometer is a field profiling instrument within the Kingmach biaxial tiltmeter group. It is used for measuring horizontal displacement changes inside soil masses in dams, building foundations, embankment slopes, underground construction projects, geotechnical slopes, and port engineering. The instrument combines a sliding inclinometer probe with a 3D-MEMS silicon capacitor biaxial inclinometer sensor and an integrated testing instrument. It supports mobile phone APP reading, Bluetooth transmission, large storage capacity for millions of readings, data download for numerical and graphical analysis, real-time wireless network sending, Chinese and English menus, and dedicated post-processing software. Published specifications include +/-90 degrees sensor range, 500 mm guide wheel spacing reference, a probe size of 26 mm by 776 mm, 8.5 kg total weight, 2 kg probe weight, -20 degrees Celsius to +60 degrees Celsius operation, 180 m water pressure impermeability, and 100 g vibration resistance.
Application of biaxial tiltmeter
Tunnel projects use biaxial tiltmeter to observe lining deformation, invert response, station box movement, shaft walls, and surrounding ground behavior. Fixed tiltmeters can be installed on structural surfaces, while in-place inclinometer systems can measure internal movement near excavation zones or adjacent slopes. JMQJ-7315ADS has IP68 protection and RS485 output, making it suitable for wet underground environments when the cable route and cabinet are protected. JMQJ-7315RTU may be useful where wireless transmission is practical. Data review should include excavation stage, support closure, groundwater, vibration, train operation, displacement readings, and crack records. The installation file should show chainage, ring number, side, axis direction, and photographs because many tunnel points look similar after construction finishes.
The future of biaxial tiltmeter
Multi-point borehole monitoring will continue to expand the role of biaxial tiltmeter. JMQJ-7915ATS already connects multiple in-place inclinometer sensors through a single cable, with grouped communication, universal joints, connecting rods, electronic identifiers, and an orifice acquisition module. This type of system turns a borehole into a depth-based deformation profile rather than a single surface observation. Future improvements will likely focus on easier factory configuration, clearer point identification, lower power operation, and faster data review. Slopes, foundation pits, dams, embankments, and underground projects benefit from knowing where movement is happening inside the ground. Depth-specific tilt data can help teams move from general warnings to targeted inspection and reinforcement planning.
Care & Maintenance of biaxial tiltmeter
Battery and power checks keep biaxial tiltmeter reliable in remote monitoring. JMQJ-7315RTU uses a 3.6V 38AH battery, while other instruments use DC 9V to 24V power or acquisition modules with standby and operating power modes. Maintenance staff should record battery status, power supply voltage, sleep interval, measurement interval, and any power outage. For low-power systems, confirm that sensors wake correctly during scheduled measurement. For wired cabinets, inspect terminals, fuses, grounding, moisture, and cable strain. A low-voltage condition can create missing data or unstable communication before a total failure appears. Power records are especially important for slopes, bridges, railways, and dams where access may be limited after installation.
Kingmach biaxial tiltmeter
The technical strength of Kingmach biaxial tiltmeter comes from combining MEMS sensing with practical acquisition details. JMQJ-7315ADS uses a high-precision acceleration integrated chip, 16-bit AD sampling, RS485 communication, an electronic code, and lightning protection design. JMQJ-7315RTU combines MEMS sensing with 4G wireless communication and low-power operating modes. JMQJ-7915ATS uses automatic temperature compensation and multi-point series connection in a borehole. JMZX-7100L uses a MEMS biaxial inclinometer probe with Bluetooth transmission and mobile phone reading. These differences are useful because field projects vary widely. Some sites need high-frequency remote acquisition, while others need periodic manual profiling. A clear specification should state measuring range, axis direction, output signal, protection grade, data logger, and review interval.
FAQ
Q: What is the difference between a fixed tiltmeter and a sliding inclinometer?
A: A fixed tiltmeter monitors one installed point continuously, while a sliding inclinometer is moved through casing to build a deformation profile by depth.Q: What is the difference between JMQJ-7315ADS and JMQJ-7315RTU?
A: JMQJ-7315ADS is a wired RS485 fixed tiltmeter, while JMQJ-7315RTU integrates wireless 4G communication and battery-powered remote monitoring.Q: When should a vertical in-place inclinometer be used?
A: Use it when deep internal deformation needs multi-point automatic monitoring inside a borehole rather than occasional manual profiling.Q: What does the JMZX-4QH module do?
A: It collects measurement data from multi-point vertical in-place inclinometer strings and uploads the data through wired or wireless means.Q: How should tilt alarms be reviewed?
A: Review angle change with rate, direction, nearby instruments, weather, construction activity, and visual inspection before deciding the response.
Reviews
James Thompson
The tiltmeters and accelerometers are very sensitive and provide precise data. Perfect for our structural health monitoring system.
Christopher Martinez
Very satisfied with the readouts & data loggers. User-friendly interface and supports multiple sensor inputs.
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