935 Dieckman St.
Woodstock, IL 60098
The RPS-400-30 has a 22mm
barrel housing, completely self -contained,
12-30VDC powered ultrasonic proximity
sensor. A sealed transducer provides
protection in environments where dirt and
moisture are a problem. The sensor is
constructed of Delrin
plastic with a silicone rubber
sensing face. This sensor is range or distance
sensitive, enabling the sensor to detect objects
within the desired range, and reject objects
outside the desired range.
The RPS-400-30 is a solid state
sensor and has an NPN open collector transistor
output. for initial setup purposes, a built
in LED indicator illuminates when the ultrasonic
waveform is reflected back to the unit within the
The sensing range is fixed at
less than 5in. by connecting the green lead to the
black lead of the cable; or adjustable up to 30in.
by connecting a resistor/potentiometer between the
green and black leads. The resistor
chart on our
catalog sheet PDF
provides resistor values and approximate
resulting sensing ranges.
The ultrasonic sensor can be
used as a proximity sensor or level sensor. It is
equally effective on liquid, metal, plastic and
glass targets regardless of color, density, or
transparency. Standard 6ft. cable is provided.
Optional cable lines are available..
Proximity detection is the detection of an
object in a given range. That
detection range of the RPS-400-30 can be
controlled by a resistor or potentiometer
wired to the green and black leads of the
unit, and is adjustable to the desired
detect distance. Any object within the
desired range is detected, while objects
outside the desired range are ignored.
The detect point is independent of size,
material, or reflectivity. The
proximity option is denoted by the part
The RPS-400-30 can be furnished with
Hysteresis Control capability. The
Hysteresis sensor has a fixed detect point
equal to the sensors minimum range and an
adjustable turn off point up to the sensors
maximum range. Simply stated, an object will
be detected at the minimum range, and will
remain detected until the object is no
longer within the adjustable turn off point.
(See figure above). the Hysteresis option is
denoted by the part number RPS-400H-30.
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