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Ultrasonic Condition Alert - specifically designed for contact applications

  • Continuously monitor - 24/7
  • Economically priced
  • Bearing failure warning
  • Cavitation warning
  • Flow/No-Flow warning
  • Valve by-pass

The UCA-586 sensor is economically priced and is specifically designed for contact applications.

The Ultrasonic Condition Alert 586 (high frequency vibration transducer) constantly monitors changes in ultrasonic emissions produced by operating equipment and fluid flows.

It has a broad range of applications since practically anything that produces ultrasound can be monitored.

Applications include:

  • Bearing Failure Warning
  • Cavitation Warning
  • Flow/No-Flow Warning
  • Valve By-Pass

How The UCA-586 Works

The Ultrasonic Condition Alert senses a narrow range of high frequency vibrations. As a change in amplitude occurs, the event is noted as either an increase or decrease in voltage. This change is noted through either a 4-20 mA or 0-10 VDC output, which is directly proportional to the received signal.

An Ultrasonic Condition Alert can monitor for an increase in amplitude, a decrease in amplitude or may even be set up to “count” ultrasonic events.

Additional Applications

  • Onset of rubbing conditions
  • Lubrication starvation warning
  • Power disruption alarm
  • Solids flow monitoring
  • Safety valve, rupture disc monitoring
  • Screw compressor bearing monitoring
  • Air handling/fan bearing monitoring
  • Valve blockage

Some examples of possible applications:

  • Highly viscous fluid flows through pipes. Small metal balls are used to separate the liquid and to act as a sound source. Monitoring the sounds of the metal balls as they move against the pipe indicates fluid flow. A drop in sound level indicates disruption of flow.
  • Groove Counting. A machine cuts 21 groves in an armature. The armature is spun 360° creating a click for each grove. With sensor contacting the armature, the instrument counts the clicks. An incorrect count is noted in a control panel.
  • A paper mill monitors a critical valve. In only specific situations is the valve to be opened. Should a valve leak, an alarm is activated.
  • A food producer automatically washes large tanks with an internal spray wand. A sensor mounted on the outer wall detects the spray of water as it hits the interior wall. A localized indicator signals a ” no-wash” condition.
  • An Electric utility has sensors affixed to cooling and feedwater boiler pumps to detect the onset of destructive cavitation. As air bubbles are compressed in these pumps, they burst producing a very distinctive ultrasound. Once a baseline is set cavitation is indicated by an increase in ultrasound amplitude.
  • Screw Compressors: Bearings are monitored for the onset of the failure mode in compressors used for refrigeration. An increase of 10-50 times over a baseline in a monitored ultrasonic frequency is the earliest indicator of bearing failure according to NASA research.
  • Fan Bearings: enclosed buildings must have ventilated air move through at a set cfm (cubic feet per minute). Should a fan bearing fail, the air quality in the building can be negatively effected. Monitors are set to alarm should a bearing enter the failure mode.
  • Cooling Fan bearings in a UPS (uninterruptible power supply) for a computer room. Should the fans fail, the computers can overheat and fail. These monitors relay an alarm to a control panel.
  • Dynamometers are used to simulate driving conditions in an automotive test facility. The bearings are critical for accurate results in the testing. Should a bearing become faulty, the readings of a particular test can be incorrect. These bearings are ultrasonically monitored to indicate the earliest onset of bearing failure.
  • Landing gear in a test lab is used to provide information about various mechanical processes related to this type of landing gear. Sensors are mounted on the bearings of this gear and set alarm should the bearing begin to fail.
The EMC-586 is an economically priced sensor that can be used for multiple contact applications.

Technical Features

Each UCA-586 comes with an adjustable sensitivity and an adjustable threshold level. In addition, each UCA-586 can be configured to provide a demodulated or “heterodyned” output through UE Systems exclusive Ultratrend.

Ultratrend is an advanced ultrasonic filtration process that provides accurate signal detection and sound wave translation. This demodulated output is ideally suited for spectral analysis and can be connected to a computer or vibration analyzer as well as a recording device, speaker or headphone.

Every UCA-586 comes complete with transducer, epoxy mountable threaded fittings, cable, LED local alarm indicator, local LED power indicator, sensitivity adjust, threshold adjust and output cable with 4-20 mA, 0-10VDC, open collector alarm and ultrasound demodulated signal termination capability.

Threshold Set Point

The Threshold Set Point is the “Alarm Trigger”. This will be used to activate whatever type of alarm is selected.

The UCA-586 may be wired to trigger an alarm if the amplitude increases, such as for bearing failure or valve leakage. Or it may be wired to alarm should the amplitude decrease, such as in flow disruption.

Sensitivity Range Set Point

The Sensitivity Set Point sets the unit to “hear” only the relevant ultrasonic signals. This is accomplished by moving a 40 dB monitoring range anywhere along the UCA-586’s 100 dB dynamic range.

UCA 586 – Ultrasonic Condition Alert System

  • Detection Frequency: 25-50 kHz
  • Power Supply Requirements: 20-30 VDC 200 mA
  • Oil resistant
  • Operating Temperature: 32°F – 140°F (0-60° C)
  • Transducer Cable: RF Shielded, Standard 9,8 ft. (3 meters)
  • Glue & Stub kit for easy installation
  • Comprehensive instruction/installation manual

Specifications overview UCA-586

Frequency Range
25-50 kHz
4-20 mA DC Linear Output
Transfer Function: dB/mA DC
Scale: 1 mA DC = 2.5 dB input level
Dynamic Measurement Range: 40 dB (set anywhere along the 100 dB input range)

0-10 DC V Linear Output Transfer Function: dB/VDC
Scale: 1 VDC = 4 dB input level
Dynamic Measurement Range: 40 dB (set anywhere along the 100 dB input range)
Open collector rated @ 24 VDC, 10 mA
Threshold Level: Adjustable over the output range. Alarm output stops con-ducting when input level exceeds the threshold level (set point)
Heterodyned (Audio) Output
90 dBA at full scale output into 16 ohms
3 dB bandwidth approx. 6 kHz
Threshold Setting
Low impedance output which sensesthe threshold setpoint (set point)
Dynamic Input Range
Approx. 100 dB
I/O Cable
RF shielded. Length: 6 ft. (1.82 m)
I/O Connector
Transducer Input Connector
Panel Adjustments
Sensitivity and threshold
Power Indicator
LED Alarm Indicator
(local) Red LED
4.3”x3.7”x 1.9”(LWH) (10.9 x 9.4 x 4.8 cm)
Can be easily mounted in standard NEMA enclosures
Operating Temperature
32°F - 140°F (0°- 60° C)
13.5 oz (.38 kg)
Piezo Electric, stainless steel housing with Female BNC connector
Dimensions: Dia: 1.0” (2.54 cm) Length: 2.4” (6.1 cm)
Thread: (female) 10/32
1 year parts/labor

Brochures & Manuals


Download a copy of the UCA-586 CE declaration of conformity >

Covered by one or more of the following patents 4416145, EPO15115, 4823600.

This product is suitable for

Bearing Inspection & Lubrication

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Steam Trap & Valve Inspection

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