Ref: Model A601-2

High-resolution 25 nrad dual-axis tiltmeter for geotechnical and scientific applications

High-resolution 2-axis tiltmeter
Measurement ranges: ±0.0115°, ±0.0235°, ±0.115°, ±0.235°.
Resolution: 25 nrad (A601-2A) or 50 nrad (A601-2B)
Differential analog output +/-8 or +/-16V
Electrolytic technology
Low-pass filter - 1 Hz
Temperature output
Horizontal installation - micrometric screws included
Operating temperature: -25 to +70°C
Power supply: ±11 to ±15 VDC
Dimensions: 15 x 15 x 10 cm
5m cable included

Presentation

A601-2 is a tiltmeter for geophysical applications requiring high resolution and highest repeatability. A601-2 tiltmeter includes two high-resolution electrolytic sensing elements mounted perpendicularly, enabling detection of minute movements on the X and Y axes (resolution < 25 to 50 nrad depending on measurement range).

4 measurement ranges are available: ±0.0115°, ±0.0235°, ±0.115°, ±0.235°. Output signal is ±8 VDC (unipolar) or ±16 VDC (differential). 2 low-pass filter gain and time constant values are selectable by switch.

Specifications

Modèle	Model A601-2A	Model A601-2B
Axes	X, Y	X, Y
Measuring range	±200 μradians (±0.0115°) ou ±2000 μradians (±0.115°)	± 400 μradians (±0.0235°) ou ±4000 μradians (±0.235°)
Sensitivity	25 nrad/mv ou 250 nrad/mv	50 nrad/mv ou 500 nrad/mv
Resolution	< 25 nrad	< 50 nrad
Non-linearity	2%	2%
Signal output	±8VDC (uni.); ±16VDC (diff)	±8VDC (uni.); ±16VDC (diff)
Temperature drift on zero	±3 μradians/°C (typical)	±3 μradians/°C (typical)
Temperature drift on sensitivity	0.05%/°C (typical)	0.05%/°C (typical)
Temperature output	0.1°C/mV	0.1°C/mV

Installation

The tiltmeter is placed on the reference surface. Levelling and calibration are performed using feet fitted with micrometric screws. 5m cable included. Voltage supply is between 11 and 15 VDC.