Ref: Série 500 - LILY

High-precision self-Leveling Borehole Tiltmeter for geotechnical applications

Geophysical biaxial inclinometer
Measurement range: ±330 µrad
±10° leveling range for easy downhole installation
Resolution up to 5 nanoradians
Fully submersible to 200 Bar (Titanium available for 350 Bar)
Power supply: 7–26 VDC – 30 mA
Signal format: SIM-NMEA (configurable)
PC reading software: ZAGI II
Output signal: RS-232 or RS-422
Operating temperature: -20 to +85 °C

Overview

The LILY Series (500 Series) ultra-high precision inclinometers are designed for geophysical monitoring applications such as volcano observation, seismology, hydraulic fracturing, and borehole measurements.
These inclinometers consist of two sensing elements (X, Y) integrated into a stainless steel or titanium sealed housing (51 mm diameter), capable of withstanding pressures up to 350 bar.

In addition to their exceptional accuracy (resolution: 5 nanoradians, measuring range: ±330 µrad), these sensors are distinguished by unmatched repeatability thanks to an automatic leveling mechanism.

The LILY inclinometer is available with RS-232 or RS-485 interface.
Sampling frequency is configurable (from 10 Hz to one reading per day).
Data can be collected continuously or stored on internal memory (2 MB for up to 64,000 readings) for autonomous operation.
Each data record includes GPS position, timestamp (internal clock), and angle values.

Specifications

Parameter	Specification
Measurement range (biaxial)	±330 µrad dynamic
Resolution	5 nanoradians
Output	RS-232, RS-422, or both; full duplex
Temperature range	-20 to +85 °C
Power supply	7–28 VDC @ 30 mA (< 10 mA in sleep mode)
Dimensions	Ø51 mm x 915 mm
Housing	Stainless steel (rated to 3,000 psi) or titanium (rated to 5,000 psi)

Installation

LILY inclinometers are installed underground (up to 3,500 m) or submerged (200 to 350 bar).
Electrical connection is made via a 6-pin terminal block or a 6-pin connector mounted on the inclinometer.
Optional connectors and cables are available.
Admissible supply voltage: 7 to 28 VDC.