Force Balance Inclinometers

SI 701WPBI

Biaxial Tilt Sensor
4-20 mA Output
Low Cost
High Performance

The Columbia Models SI-701WPBI and SI-701WPBIHP are waterproof versions of Columbia's popular Model SI-701BI and SI-701BIHP. These waterproof sensors are designed with an output circuit configuration made for use with 4-20 mA data transmission systems used extensively in industrial installations in order to transmit data over long distances in rough environments.

The general purpose Model SI-701BI and high performance Model SI-701BIHP Inclinometers and optional waterproof cable assemblies allow remote tilt sensing in a variety of applications such as dam gate control, drawbridge control and platform stabilization. Consult the factory for customized versions of these sensors.

Specifications

Output Impedance	50 Megohm Typical
Ranges Available	+15°, +30°, +45°, +90°
Excitation	+15 +1 VDC <50 mA
Scale Factor Tolerance	+1% F.R.
Scale Factor Temp Coefficient	+0.02% / Deg C
Output Current	4-20 mA
Output Function	Io = 12 + K Sin (mA) +0.5% of Normal Into a Maximum Load of 600 Ohms
Non-Repeatability	+0.1% F.R.
Non-Linearity	+0.2% F.R.