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AccuStar™ II / DAS 20 Dual Axis Clinometer

Dual Axis Clinometer AccuStar II

AccuStar® II/DAS-20 combines the function of two clinometers in one package. The unique dome shaped design features a capacitance based sensor which produces output signals directly proportional to the relative tilt in two axes.

Designed for high volume applications, AccuStar® II/DAS-20 is priced to compete with much less capable mercury switches and other low cost level sensors.

There are four output connections providing a choice of ratiometric, pulse width modulation (PWM) digital output. A mating connector (sold separately) provides the user with an easy plug-in connection. Null and scale factor are adjustable.

FEATURES

  • Microprocessor-Based Electronics
  • Two Clinometers In One Package
  • Adaptable Design DC Powered
  • Ratiometric and PW Digital Output in One Model
  • Trimmable Outputs

APPLICATIONS

  • Platform Leveling
  • Measure Pitch and Roll
  • Tip Over Protection for Manlifts
  • Automatic Leveling Systems
  • Wheel Alignment
Physical construction of tilt sensor AccuStar II

Physically the sensor is composed of two hermetically sealed domes spaced about 1/8" apart. The lower, polyester plastic dome has 4 capacitive plates while the aluminum, upper dome acts as a ground. A fluid with a high dielectric constant is sealed within the dome sandwich, leaving an air bubble space about the size of a quarter. The bubble is centered at level position and will move from one side to the other as the device is tilted.

Specifications

Performance:

Range:

±20°

Threshold / Resolution:

0.01°

Linearity:

  
 

0 ... 10°

±0.2°
 

10° ... 12°

±2.5 % of reading
 

12° ... 15°

±3.0 % of reading
 

15° ... 20°

monotonic

Null Repeatability:

±0.1°

Frequency Response (-3 dB)

0.25 Hz (0.50 Hz on request)

Weight:

  
 

with case

91 g
 

without case

31 g


Environmental:

Operating Temperature Range:

-20 ... +65 °C

Storage Temperature Range:

-55 ... +65 °C

Temperature Coefficient of Null:

0.01°/K

Temperature Coefficient of Scale Factor:

0.10%/K


Electrical:

Voltage Supply, nominal:

9 VDC

Voltage Supply Range:

5.0 ... 15.0 VDC regulated

Current:

10 mA

Analog Output:

  
 

Scale Factor at 9 VDC

100 mV/° ±10 %
 

Load Resistance (min)

10 kOhm
 

Null Voltage

1/2 supply voltage ±10 %

Pulse Width Output:

  
 

Tilt 0°

50 % (duty cycle)
 

Scale Factor, nominal

0.7 %/°
 

Duty Cycle

t2 / ( t1 + t2 ), t1 and t2 varies from 0.2 ... 0.7 ms

Frequency, nominal:

100 Hz

Dimensions

AccuStar II with case:

Dimensions of AccuStar II with case

AccuStar II without case:

Dimensions of AccuStar II without case

All dimensions in "inch", values in brackets in "mm", approx. values.
These drawings are for information only and not intended for construction purpose. Please ask for detailed drawings.

Information in the PDF datasheet (see above) may be more detailed. Due to continual product development, ALTHEN and partners reserve the right to vary the foregoing details without prior notice.