SCA111T and SCA121T Series
Stand Alone Inclinometer
Single or 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 (dual axis)
For customised product please contact VTI Technologies
ELECTRICAL CHARACTERISTICS
Parameter
Supply voltage
Current consumption
Output load
Resistive
Capacitive
10
20
Condition
Unregulated or
regulated ratiometric
Min.
7
4.75
Typ
16
5
5
Max.
35
5.25
Units
V
V
mA
kΩ
nF
Applies to: -D02, -D03, -D07
Applies to: -D04, -D05
PERFORMANCE CHARACTERISTICS
Parameter
Measuring range
(1
Supply voltage
Measuring axis
Offset
(2, 5
Offset zero point error
(5
Offset temperature error
Sensitivity
Sensitivity temperature error
(5
Nonlinearity
Frequency response –3 dB
Cross-axis sensitivity
(4
Typical values unless otherwise specified.
(3
Condition
SCA111T-D02
±
30
7 ...35
SCA121T-D03
±
90
7 ...35
X-Y
2.5
1
±0.2
±0.6
35
-0.8 ...0.3
-1.5 ...0.5
N/A
18
3
SCA121T-D07
±
30
7 ...35
X-Y
2.5
1
±0.2
±0.6
70
-0.8 ...0.3
-1.5 ...0.5
0.1
18
3
SCA111T-D04
±
90
5
±0.25
X
2.5
1
±0.2
±0.6
35
-0.8 ...0.3
-1.5 ...0.5
N/A
18
3
SCA121T-D05
±
90
5
±0.25
X-Y
2.5
1
±0.2
±0.6
35
-0.8 ...0.3
-1.5 ...0.5
N/A
18
3
Units
°
V
V
°
°
°
mV/°(@offset pos.)
%
%
°
Hz
%
(see “Directions”)
Output at 0 °
Max. deviation
0…70 °C
-25...85 °C
Sine of inclination
0…70 °C
-25...85 °C
Sinus output
X
2.5
1
±0.2
±0.6
70
-0.8 ...0.3
-1.5 ...0.5
0.1
18
3
Note 1
Note 2
Note 3
The measuring range is limited by the sensitivity and offset.
Offset specified as Output @ 0 °.
The frequency response is determined by the sensing element’s internal gas damping.
The output has true DC (0 Hz) response.
Note 4
Note 5
The cross-axis sensitivity determines how much inclination, perpendicular to the measuring
axis, couples to the output.
For optimum zero point accuracy, mounting angle of the part can be adjusted.
MEASURING DIRECTIONS
X-axis
Mounting position 1
(Horizontal)
Y-axis
Mounting position 1
Mounting position 2
Mounting position 2
(Vertical)
Earth’s gravity
Negative incl.,
Zero position,
Positive incl.
Deviation
Positive incl.,
Zero position,
Negative incl.
Deviation
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.
Rev. 3 / 1 Nov 2005
VTI Technologies reserves the right to modify this specification without prior to notice.
VTI [ VTI TECHNOLOGIES ]
