Continuous Level Measurement for Short Blanking Applications
The UM-SB mini ultrasonic transmitter from ABM is the ideal solution for short range liquid level applications that require a minimal blanking distance. The non-contact ultrasonic transmitter provides continuous level measurement up to 6 ft (1.8 m) with 4-20 mA output standard and simple push-button calibration. The transmitter is suitable for a variety of applications with RS485 communication, optional relay SPDT 8A / 230 VAC for alarm, and remote monitoring with the Cellular Gateway.
Industries
- Water & Wastewater
- Chemical
- Petrochemical
- Food & Beverage
Applications
- Level of small tanks, containers, totes or drums
- Process tank level and control
- Inventory level in storage tanks
- Open channel water or wastewater measurement
- Wastewater flume or weir flow measurement
High Performance, Maintenance Free Mini Ultrasonic Transmitter.
- Self-adjusting sensor, automatically eliminates false echoes without user involvement
- Very uniform polar pattern, negligible side lobes
- Very uniform near field
- Very wide frequency bandwidth that produces uniform echoes, short ringing and wide temperature operation
- No influence from mounting, walls or internal obstructions on sensors performance
- No influence from temperature, pressure or humidity on measurement
- Automatically removes condensation and build-up from transducer face
- Non-contact and self-cleaning nature provides maintenance free operation
Technology Advantage
ABM’s self-adjusting mini ultrasonic transmitters continually monitor conditions in the environment and automatically adjust the transmitted energy, transmitted pulse amplitude and it’s duration, and receiver sensitivity to match to the current tank conditions. This technique allows the receiver to detect only one echo from the measured media while all false echoes are pushed under the noise level and eliminated. The self-adjusting technique also gives the same amplitude of wanted echoes regardless of distance to the target. With one echo only, signal processing is very simple and the certainty of the measured echo being the target is 100%. This makes the ABM transmitters very accurate and reliable. In addition, it enables very fast response (up to 20 echoes per second) for fast moving applications such as conveyor belts.
The transmitters have very narrow and uniform polar patterns. ABM’s ultrasonic technology has a very wide frequency bandwidth that produces uniform echoes, short ringing, and wide temperature operation.
Operation is plug-and-play with ABM sensors. The self-adjusting nature means there is no need for mapping or profiling the environment or downloading several parameters. These signal process operations commonly used by other brands reduce the certainty in the measured materials level. ABM sensors are smart and automatically adapt without user involvement.
Technology: Ultrasonic
Measuring Range: 0.16 – 6 ft (0.05 – 1.8 m)
Accuracy: +/- 0.10 % of maximum range (in lab using 4-20 mA current output). +/- 0.25 % of maximum range (typical in field)
Resolution: 0.03″ (0.7 mm)
Blanking Distance: 2″
Frequency: 148 kHz
Calibration: Push-button or programmable via communications port
Output: 4-20 mA output 6.1 uA resolution
Relay Option: SPDT 8A / 230 VAC relay for alarm optional
Power: 12-30 VDC (3-wire)
Communication: RS485
Ambient Temperature: -40 to 60°C (-40 to 140°F)
Installation Category: Class II
Enclosure Material: PVC
Protection Rating: IP68 (NEMA 6)
Transducer: PVC
Process Connection: 1″ NPT
Process Temperature: -40 to 60°C (-40 to 140°F)
Process Pressure: ≤ 2 Bar (29 psi)
