Model A701-2: 4X Weatherproof Tiltmeter

The Model 701-2 Platform mount tiltmeter is our most popular design for high precision tilt measurements. Units come with built-in invar leveling legs, for easy installation on any horizontal surface. The A701-2 also includes two switchable gains and two low-pass filter settings.

Using an absolute gravity-referenced electrolytic sensor, the A701 delivers ultra-high sensitivity to <0.1 µrad with virtually zero long-term drift. The output is a stable ±8 DC voltage (±16 VDC differential). The D701 digital version has onboard memory, with a storage capacity of up to 22,000 samples.

Weight	1.36 kilograms
Dimensions	152.4 x 152.4 x 101.6 mm
Features	Rugged, reliable, and extremely accurate, Ultra-high sensitivity to <0.1 µrad with virtually zero long-term drift, Weatherproof 4X version available
Applications	Bridge deflection monitoring, High-accuracy tilt monitoring, High-precision geotechnical engineering, Precision metrology, Radar platform leveling, Volcano Monitoring
Linear Range (°)	High Gain: ±0.046, Mid-Range: ±3.0
Scale Factor	High-Gain: 1µradian/mV, Mid-Range: 0.5°/V
Non-linearity (%)	1, 2
Resolution	<0.01, 1.0µradian
Repeatability	2µradian (static)
Time Constant (seconds)	0.15
Kz Coefficient (°/C, typical)	&plusmn4µradian
Ks Coefficient (%/C, typical)	0.04
Output (VDC)	Differential: ±16Vdc, Single-ended: ±8Vdc
Channels	Temperature, X-tilt, Y-tilt
Output Impedance (Ω)	270
Temperature Output	0.1°C/mV typical (single ended; 0°C = 0mV)
Power	250mV ripple max, Reverse polarity protected, ±11 to ±15 Vdc @ +11 and -6mA
Environmental	-25 to +70°C, -30 to +100° C storage
Seal	IP50
Materials	Anodized and Alodine Aluminum
Cable	3m (10 ft) multiconductor cable + overall shield, Connectors included, PVC jacket

Model A701-2: 4X Weatherproof Tiltmeter

Model A701-2: 4X Weatherproof Tiltmeter

Related products

Model A711-2A/B/C(4X)

Model A711-2 & A716-2

Model A701-2 Platform Tiltmeter

Model D701 Platform Tiltmeter