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AIT430L Servo-inclinometer with taut- band suspension and 4 ... 20 mA output, stackable for X and Y measurements

Servo Inclinometer AIT430L

The AIT430L series is a family of single axis, high-precision, closed loop, gravity referenced servo inclinometers, ideal for use within a variety of application environments, and where space is at a premium.

Available in ranges from ±3° to ±90°, with a form factor measuring only 61 mm high and a diameter measuring less than 37 mm. The AIT430L offers a high-level 4 … 20 mA signal, proportional to the sine of the angle of tilt. Units are fully self-contained, and able to connect to a DC power source and readout or control device, to form a complete operating system. Units are extremely rugged, and can withstand a 1500 g shock event. Solder pin terminations are standard.

The 4 … 20 mA output of the AIT430L series is specifically designed for electrically noisy environments, or where inclinometer output signals must travel over a long distance. AIT430L series inclinometers operate on a single 24 VDC supply and the output series load resistance can be as high as 400 Ω. The AIT430L series inclinometers have a long and successful market history under the Schaevitz® brand.

Applications

  • Bore hole mapping, dam and rock shifts and other geophysical, seismic & civil engineering studies
  • Downhole logging
  • Any precision measurement application where space is at a premium

Features

  • Available in ranges from ±3° to ±90°
  • Fully self-contained, able connect to a DC power source and a readout or control device for a complete operating system
  • High level 4 … 20 mA output signal proportional to sine of the angle of tilt
  • Extremely rugged, withstands 1500 g shock

Specifications

Parameter Unit

Performance by Range at 20 °C

Range:

°

±3

±14.5

±30

±90

Excitation voltage:

VDC

24 ±10 %

Current consumption:

mA (nom)

35

Full range output (FRO) (see note 1):

mA (nom)

16

Output load resistance:

Ω (max)

400

Output standardisation:

% FRO

±2

Output noise:

mA (max)

0.020

Non-linearity (see note 2):

% FRO (max)

0.08

0.05

0.05

0.08

Non-repeatability:

% FRO (max)

0.02

0.004

0.004

0.004

Resolution:

arc seconds

0.2

1.0

2.0

4.0

Frequency -3 dB:

Hz (nom)

15

30

40

55

Sensitive axis to case misalignment:

deg (max)

±0.15

±0.25

±0.5

±1.0

Cross axis sensitivity (see note 3):

% FRO (max)

0.1

Output at zero angle (see note 4):

mA (nom)

12

Zero angle output tolerance:

mA (max)

±0.10

±0.07

±0.07

±0.07

Thermal zero shift:

% FRO/K (max)

±0.05

±0.02

±0.01

±0.01

Thermal sensitivity shift:

% reading/K (max)

±0.05

±0.02

±0.01

±0.01


Environmental

Operating temperature range:

°C

-18 … +70

Survival temperature range:

°C

-40 … +70

Constant acceleration overload:

g

50

Shock survival:

  

1500 g, 0.5 ms, ½ sine

Vibration endurance:

  

35 g rms, 20 Hz to 2000 Hz sinusoidal

Environmental sealing:

  

IP65

Notes:

  1. Full Range Output is defined as the full angular excursion from positive to negative, i.e. ±90° = 180°
  2. Non linearity is determined by the method of least squares.
  3. Cross axis Sensitivity is the output of unit when tilted to full range angle in cross-axis.
  4. Zero offset is specified under static conditions with no vibration inputs.

Dimensions and Electrical Connections

Abmessungen Servo-Inklinometer AIT430L

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

Connections:
Pin A: Supply 24 VDC
Pin B: Supply ground
Pin C: Signal Ground
Pin D: Signal output

Ordering Information

AIT43x - 0001 - yL

Connection x:
5 = Solder pins

Ranges y:
3 = ±3°
14.5 = ±14.5°
30 = ±30°
90 = ±90°

Specify model type with appropriate range e.g.
AIT435-0001-14.5L is a standard inclinometer with solder pins, output 4 ... 20 mA, and a range of ±14.5°

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.