Micro-Arc 0728-1025-99 Ceramic0 pages

DATA SHEET

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Operating Specifications

Description
The 0728-1025-99 ”Micro-arc” uses ceramic construction
technology. This wide-angle sensor is manufactured to precise
tolerances for extreme sensor-to-sensor sensitivity and
repeatability. The 0728-1025-99-sensor features linear output
to ±75°, good vibration resistance, and superior cross axis
properties. Glass sealing technologies allow for operation in a
wider temperature range.
Angle Range
Resolution
Null Repeat

85
.2 arc minutes
± .05°

Applications Include
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Off Road and Construction Vehicles
Medical Instruments
Navigational and GPS Compensation
Robotic and Automotive Applications
Oceanographic Instrumentation

85
Operating Range (max.)
Linear Range (10 to 90%)
± 75°
Linearity
±3%
Null Voltage
≤0.025 Volts
Null Current(max.)
0.2 mA (continuous)
Null Impedance (nom)
10.0 K Ohms (25°C)
(measured left to right electrode)see fig. 2
Repeatability
±.05 °
Resolution
< 0.2 arc minutes
Symmetry (typ)
< 5%
Mech. Crosstalk / Deg. (typ)
0.005°
-20 C to +100 C
Operating Temperature
-20 C to +100 C
Storage Temperature
Time Constant (1) 2
< 100 msec
Materials
non-magnetic
Note: Null Impedance of the sensor may be modified to
individual requirements upon special order.

Physical Dimensions
Height
Width
Diameter – mounting hole
Wire length (min)

0.850” (21.59mm)
0.750” (19.05mm)
0.0625” (1.59mm)
6” (152.4mm)

OUTPUT SENSITIVITY

Sensor Test Circuitry

Descrition of Test Values
AC input voltage = Null
Current (max) times Null
Impedance (nom)
Eout = Angle of tilt from null
(Direction of tilt
determined by phase of
Eout)

OUTPUT (percentage)

Tests were conducted by exciting the left and right electrodes
with an AC signal of 400 Hz and an rms voltage to produce the
maximum current at null as per operating specifications. Output
readings are taken between the center electrode and the center
of the balanced resistors R1 and R2. Tests were conducted at a
temperature of +25 C. See sensor test circuitry in figure 3.
Output curve is shown in figure 1.

100
80
60
40
20
0
-90 -75 -60 -45 -30 -15 0

15 30 45 60 75 90

TILT ANGLE (degrees)

R1 =R2 = ½ Null Impedance
(nom)
Caution!-Ensure that all test and operating circuits are
entirely free of direct current. Direct current will cause level
damage and/or instability.
The Fredericks Company l 2400 Philmont Ave ● HuntingdonValley, PA 19006-0067
Tel: 215.947.2500 l Fax: 215.947.7464 l Email: sales@frederickscom.com l www.frederickscom.com
0728-1025-99data sheet Revision: B