Model A601-2A/2B High-precision Platform Tiltmeter

The model A601-2 Platform mount tiltmeter is designed for high precision tilt measurements. Units come with built-in micrometer leveling legs, for easy installation on any horizontal surface. The A601-2 also includes two switchable gains and two low-pass filter settings. Using an absolute gravity-referenced electrolytic sensor, the A601-2 delivers ultra-high sensitivity to <25 nrad with virtually zero long-term drift. Output is a stable ±8 DC voltage (±16 VDC differential). Rugged, reliable, and extremely accurate, the A601-2 is the preferred choice for volcano monitoring, high-precision geotechnical engineering, bridge deflection monitoring, precision metrology, radar platform leveling, and high-accuracy tilt monitoring applications worldwide.

Additional Information

Weight 48 oz
Dimensions 6 × 6 × 4 in

Performance Specifications

Model A601-2A (High Gain)Model A601-2B (Mid Range)
Angular RangeHigh Gain: ±200 µradians (±0.0115°)
Low Gain: ±2000 µradians (±0.115°)
High Gain: ±400 µradians (±0.0235°)
Low Gain: ±4000 µradians (±0.235°)
Scale FactorHigh Gain: 25 nradian/mV
Low Gain: 250 nradian/mV
High Gain: 50 nradian/mV
Low Gain: 500 nradian/mV
Non-linearity2.0% 2.0%
Resolution<25 nradians<50 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


User Manual
Outline Drawing

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