500 Series Tiltmeters for Advanced Research
Model 520 Geodetic Platform Tiltmeter
Our top performer for surface applications, Model 520 is designed for projects demanding maximum resolution and stability. Applications include leveling and alignment of platforms and antennae, measurement of earth tides and crustal deformation, and volcano monitoring. With resolution finer than 10 nanoradians, Model 520 is excellent for use in all static tilt applications, or as a sensitive long-period accelerometer. Each system includes the tiltmeter, a rugged fiberglass switch box and a 3-meter interconnect cable. Select among three gains and two low-pass Butterworth filters using switches in the switch box. Leveling and user calibration of the tiltmeter are performed with built-in micrometers or worm gear legs. Mechanical adjustment range is ±3 degrees.
Specifications:
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Range (Biaxial) |
Low: ±1400 Middle: ±160 High: ±16 µradians |
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Resolution |
< 10 nanoradians (< 0.01 µradians) |
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Output |
±8 VDC single-ended and ±16 VDC differential |
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Power Requirement |
±11 to ±15 VDC @ 15 and 7mA |
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Temperature Range |
-25 to +70°C |
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Dimensions |
Tiltmeter: 230 x 230 x 129 mm
Switch box: 230 x 200 x 140 mm |
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Housing |
Anodized aluminum, O-ring seals |
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LILY Self-Leveling Borehole Tiltmeter
LILY is the culmination of over 25 years of experience in the fields of instrumentation and geophysics. We developed LILY for volcanic and tectonic research, ocean bottom applications, and for monitoring of hydraulic fracturing and other subsurface processes in the mining and petroleum industries. LILY ‘s high-pressure stainless steel housing is rated for submergence to depths of 3500 meters. You can attain even greater depths by switching to a titanium housing. The tilt sensors in LILY can self-level on command through a range of ±10 degrees and have 5 nanoradians resolution over a dynamic range of ±330 microradians. The self-leveling feature keeps LILY on scale indefinitely at the high gains required for geophysical work. Its versatile RS232 and RS422 serial outputs, and its powerful firmware command set, give you a wide range of measurement and recording options. Data can be stored internally for periodic downloading, or streamed to your external network or recorder. GPS compatible output formats are included.
Specifications:
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Range (Biaxial) |
±10° adjustment range, ±330 µradian dynamic |
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Resolution |
5 nanoradians |
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Output |
RS232, RS422, or both; full duplex
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Temperature Range |
-20 to +85°C |
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Power Requirement |
7-28 VDC @ 30mA (<10 mA in sleep mode) |
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Dimensions |
51 mm dia. x 915 mm |
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Housing |
Stainless steel, rated to 345 bars (5,000 psi) |
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