Inclination sensor SCA121T - VTI Technologies - (Version JPG) - PDF Catalogue | Technical Documentation

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Tilt sensor, Sensor, Accelerometer, Gyroscope, MEMS

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SCA121T Series

Stand Alone Inclinometer

Dual Axis Analog Output

FEATURES

• Silicon 3D MEMS sensor

• 0,1 ° accuracy

• Resolution < 0,001 °

• Operating temperature range -40...+85 °C

• Long term stability < 0,02 °

• Shock resistance >20 000 g

• Sensing element -3 dB @ 18 Hz

• Main dimensions: 30x30x13 mm size, single or dual axis

• Voltage output

• RoHS compatible

BENEFITS

• Excellent long term stability

• Sensing element controlled frequency response

• Outstanding shock durability

• Harsh environment robustness

APPLICATIONS

• Platform tilt measurement

• Equipment and instrument condition monitoring

• Inclination based position measurement

• Rotational orientation measurement

For customised product please contact VTI Technologies

ELECTRICAL CHARACTERISTICS


Parameter	Condition	Min.	Typ	Max.	Units
Supply voltage	Unregulated or	7	16	35	V	Applies to: -D03, -D07
Supply voltage	regulated ratiometric	4.75	5	5.25	V	Applies to: -D05
Current consumption			5		mA
Output load	Resistive	10			kil
	Capacitive			20	nF


PERFORMANCE	CHARACTERISTICS
Parameter	Condition	SCA121T-D03	SCA121T-D07	SCA121T-D05	Units
Measuring range ⁽¹		±90	±30	±90	0
Supply voltage		7 ...35	7 ...35	5 ±0.25	V
Measuring axis	(see "Directions")	X-Y	X-Y	X-Y
Offset ^(2, ⁵	Output at 0 °	2.5	2.5	2.5	V
Offset zero point error ⁽⁵	Max. deviation	1	1	1	0
Offset temperature error	0...70 °C -25...85 °C	±0.2 ±0.6	± 0.2 ±0.6	± 0.2 ±0.6	₀ 0
Sensitivity		2	4	2	V/g
		35	70	35	mV/o(@offset pos.)
Sensitivity temperature error ⁽⁵	0.70 °C -25...85 °C	-0.8...0.3 -1.5 ...0.5	-0.8...0.3 -1.5...0.5	-0.8 ...0.3 -1.5...0.5	% %
Nonlinearity	Sinus output	N/A	0.1	N/A	0
Frequency response -3 dB ⁽³		18	18	18	Hz
Cross-axis sensitivity ⁽⁴		3	3	3	%

Typical values unless otherwise specified.

Note 1 The measuring range is limited by the sensitivity and offset. Note 4 The cross-axis sensitivity determines how much inclination, perpendicular to the measuring Note 2 Offset specified as Output @ 0 °. axis, couples to the output.

Note 3 The frequency response is determined by the sensing element's internal gas damping. Note 5 For optimum zero point accuracy, mounting angle of the part can be adjusted. The output has true DC (0 Hz) response.

MEASURING DIRECTIONS

X-axis Y-axis

Mounting position 1 (Horizontal)

Mounting position 2 (Vertical)

Devi ation Negative ind, Zero posi tion, Posi tivei ncl. Devi ati on Posi tive ind, Zero positi on, Negative i ncl.

Figure 1. Positions

Notes:

• It is important that the part is parallel to the mounting plane, and that the output equals the zero value when sensor is in zero position.

• Zero position: Please note the picture above which provides information on how the output of the accelerometer behaves in different circumstances when assembled. Please also note that you can rotate the part around the measuring plane for optimum mounting location.

¥11^

TECHNOLOGIES

Rev. 5 / 3 Dec 2008

VTI Technologies reserves the right to modify this specification without prior to notice.

Inclination sensor SCA121T - VTI Technologies - #1

Tilt sensor, Sensor, Accelerometer, Gyroscope, MEMS