280-DCU Self Contained Ultrasonic Sensors

The Model 280-DCU Self Contained Ultrasonic Sensors use ultrasonic technology to provide a non-contact method of detecting flow, presence, level, volume, proximity, and distance measurements. This versatility makes them ideal for a variety of applications. Ultrasonic sensors are not affected by target surface, color or translucency and they function extremely well in harsh environments. When monitoring liquids, they are not affected by changes in dielectric constant, specific gravity, or viscosity. The sensors are reliable, user adjustable, and require little or no maintenance.

Ultrasonic sensing is very similar to radar. A sound wave is generated by the instrument. If it meets something solid or reflective, such as liquid, it bounces back. The time delay is measured and since the speed of sound is a well known variable, a distance can be calculated. Until recently, however, the many variables in the speed of sound created inaccurate readings. Now with low cost microprocessor technology, these variables can be factored into the equation and eliminated. One such variable is ambient temperature. Many of the series are temperature compensated. Other variables such as waves on a liquid, tank irregularities, agitators, and humidity, are also accounted for when AutoSense is selected.

The resulting output of the sensor is converted into either an analog signal that is user specified, an RS232 computer signal, a relay output, or some combination of the above.

Specifications

280-DCU7110
Operating range: 1-16' (0.3 to 5 m)
Outputs: 0-5 Vdc
Supply voltage: 10-24 Vdc
Total current: 70 mA max @ 24 Vdc
Housing: PVC
Mounting: 2" NPT male
Trandsucer type: Ceramic, PVC faced
Ratings: NEMA-4X, IP65
Approvals: CE
Response time: programmable*
Resolution 0.05" (1.3 mm)
Accuracy (with no temperature gradient): 0.2% of detected range
Adjustments: RS232 computer interface
Operating temperature: -30° to 60°C
Temperature compensation: Internal
Sample rate: 12 Hz
Beam Pattern: 9° off axis
Connector: 8 conductor, 22 AWG, PVC jacket, 6' (1.8m) cable
Frequency: 62 kHz

280-DCU1104
Operating range: 2-50' (0.6 to 15 m)
Outputs: 4-20 mA analog; 2 form A SSR trip points; 1 pulse width
Supply voltage: 24 Vdc
Total current: 200 mA max @ 24 Vdc
Housing: PVC
Mounting: 3" NPT male
Trandsucer type: Ceramic, PVC faced
Ratings: NEMA-4X, IP65
Approvals: CE; FM Class I, Div 2; Groups A,B,C,&D
Response time: programmable*
Resolution 0.1" (2.5 mm)
Accuracy (with no temperature gradient): 0.25% of detected range
Adjustments: Integrated keypad
Operating temperature: -30° to 60°C
Temperature compensation: Internal
Sample rate: Programmable (1 to 8 sec)
Beam Pattern: 9° off axis
Connector: 10 conductor, 22 AWG, PVC jacket, 6' (1.8m) cable
Frequency: 42 kHz

280-IRU2123
Operating range: 9" to 25' (0.22 to 8 m)
Outputs: 4-20 mA
Supply voltage: 12-24 Vdc
Total current: 95 mA max @ 24 Vdc
Housing: PVC
Mounting: 3NPT
Trandsucer type: Ceramic, PVC faced
Ratings: NEMA-6P, IP67
Response time: programmable (20 ms min)
Resolution 0.1" (2.5 mm)
Accuracy (with no temperature gradient): 0.25% of detected range
Adjustments: RS232 computer interface with RST2001
Operating temperature: -40" to 140"F (-40" to 60"C)
Temperature compensation: Internal
Sample rate: Programmable (1 to 22 Hz)
Beam Pattern: 9" off axis
Connector: 6 conductor shielded cable
Frequency: 69 kHz

* 5 second minimum resolution time on excitation

Ordering Information

280-DCU7110 Self Contained Ultrasonic Sensor
280-DCU1104 Self Contained Ultrasonic Sensor
280-IRU2123 Self Contained Ultrasonic Sensor

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