Model A603 High Precision Platform-Mount Tiltmeter

The model A603 platform mount tiltmeter is designed to fill the gap left by the obsoleted 520M.

Units come with the same leveling worm-gear feet that were on the 520M. The A603 also includes two switchable gains and two low-pass filter settings. Using an absolute gravity referenced electrolytic sensor, the A603 delivers ultra-high sensitivity to <2.5 nrad with virtually zero long-term drift. Output is a stable ±8 DC voltage (±16 VDC differential). Rugged, reliable, and extremely accurate, the A603 is the preferred choice for volcano monitoring, high-precision geotechnical engineering, precision metrology, radar platform leveling, and high-accuracy tilt monitoring applications worldwide.



Additional Information

Weight 168 oz
Dimensions 9.25 × 9.25 × 5 in

Performance Specifications

Model A603-A (High Gain)Model A603-C (Ultra High Gain)
Angular RangeHigh Gain: ±200 µradians (±0.0115°)
Low Gain: ±2000 µradians (±0.115°)
High Gain: ±20 µradians (±0.00115°)
Low Gain: ±200 µradians (±0.0115°)
Scale FactorHigh Gain: 25 nradian/mV
Low Gain: 250 nradian/mV
High Gain: 2.5 nradian/mV
Low Gain: 25 nradian/mV
Non-linearity2.0% 2.0%
Resolution<25 nradians<25 nradians
Time ConstantFilter on: 7.5 sec; Filter off 0.5 sec
Kz Temp Coefficient (°/C)±3 µradians/°C (typical)
Ks Temp Coefficient (%/°C)0.05%/°C (typical)
Output±8VDC (single ended); ±16VDC (differential)
ChannelsX-tilt, Y-tilt, Temperature
Output Impedance270 Ω
Temperature Output0.1°C/mV typical (single ended; 0°C = 0mV)
Power±11 to ±15 VDC @ +11 and -6mA, 250 mV ripple max, reverse polarity protected
Environmental -25 to +70°C operational; -30 to +100°C storage; IP50 Seal
MaterialsAnodized and painted aluminum dome, Stainless Steel base and hardware


Outline Drawing
User Manual

Click outside to hide the comparison bar