Jewell Instruments Lily Specifications

LILY Self-Leveling Borehole Tiltmeter

The LILY Self-Leveling Borehole Tiltmeter is a precision, dual axis
sensor package designed for specialized applications and
research. Applications include volcanic and tectonic research,
hydraulic fracture mapping, micro-deformation monitoring,
deep ocean geophysics, and more.

Using a high-precision electrolytic tilt sensor, units deliver
resolution to 5 nanoradians; dynamic range is ±330 μradians.
Units also feature a +/-10 deg. leveling range for easy
installation downhole. Output is RS232 or RS422 (RS485 full
duplex) and includes timestamp and compass bearing. Data can
be saved to file externally or to LILY’s on-board flash memory
(75,000 sample max) using fill/stop or cyclic memory modes.

Units are fully submersible to 3000 psi. Titanium is also
available for +5000 psi applications. The culmination of over 30
years of tilt sensor experience and expertise, the LILY
represents the pinnacle in precision sensor engineering. Contact
Jewell Instruments today for more information about this
powerful instrument.

Specifications
Channels X tilt, Y tilt, azimuth, temperature

Resolution < 5 nanoradians

Repeatability

Dynamic Range

Self-Leveling Range ±10 degrees

Non-Linearity

Frequency Resonse < 1 Hz

Ks Temp Coefficient (%/°C) ±0.02%/°C

Kz Temp Coefficient (bias/°C)

Azimuth detection On-board magnetic compass, 0° to 360° output

Output RS232 and RS422 standard (user selectable)

Baud rate 9600, 19200 (default), 28800, 57600, 115200, 230400

Sample rate User programmable from 10 samples/sec to 1 sample/day

Output Format NMEA XDR, Trimble TCM, Ashtech, Simple (Timestamp, X, Y, Temp, Compass, S/N)

On-board Memory 2 Megabytes nonvolatile Flash memory (64,000 samples)

Real-time Clock Accurate to 10 minutes/year or better

Power 7 to 28 VDC @ 30 mA (< 10 mA sleep); 250 mV ripple max., reverse polarity protected

Environmental -25°C to +85°C operational, -30°C to +100°C storage. 3000 psi

Dimensions 51mm O.D. x 915mm (2 x 36 in); handle length 150mm (6 inches); 4.5 kg (10 lb)

Materials 304 stainless steel, nonmagnetic (6Al-4V Titanium available on request: to +5000 psi)

Same as resolution under static conditions

±330 µradians

0.2% of full span

±3 µradian/°C

Specifications subject to change without notice as the result of ongoing development

Jewell Instruments LLC 850 Perimeter Road, Manchester, NH 03103

[e-mail] • www.jewellinstruments.com • Tel [phone]

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