Description
- Model Number: LM80.A
- Technology: Non-contact Laser Time-of-Flight
- Measurement Range: Up to 30 m (100 ft) for liquids; up to 100 m (330 ft) for solids
- Accuracy: ±30 mm (1.2 in)
- Beam Divergence: < 0.3°
- Output Signal: 4-20 mA with HART protocol
- Power Supply: 24 V DC nominal (18 to 32 V DC)
- Housing Material: Powder-coated aluminum or Stainless Steel
- Process Temperature: -40°C to +60°C (-40°F to +140°F)
- Pressure Rating: Atmospheric
The LM80.A is a high-performance non-contact laser level transmitter designed for the precise measurement of bulk solids, slurries, and opaque liquids. Utilizing advanced time-of-flight technology, the module emits a narrow laser pulse that reflects off the material surface, allowing for accurate distance calculation even in narrow vessels or environments with internal obstructions. Its maintenance-free design and ability to measure through dust and vapor make it a reliable solution for inventory management in silos, crushers, and chemical storage tanks where traditional ultrasonic or radar sensors may struggle with signal interference.
Comparison with Similar Models
The LM80 series provides distinct advantages depending on the application environment and range requirements:
- LM80.A vs. LM200: While the LM80.A is optimized for standard industrial ranges up to 100 meters on reflective surfaces, the LM200 is a long-range specialist capable of measuring up to 190 meters. The LM80.A is generally the more cost-effective choice for typical silo and tank applications that do not require extreme distance capabilities.
- LM80.A vs. LLT100: The LLT100 is ABB’s more modern successor featuring a narrower beam and enhanced signal processing for clear liquids. The LM80.A remains a rugged, proven workhorse specifically favored for heavy industrial bulk solids and dusty environments where its robust optical window and simplified configuration are highly valued.
- LM80.A vs. Ultrasonic Transmitters: Unlike ultrasonic sensors that are affected by air temperature fluctuations and wind, the LM80.A laser technology is unaffected by the speed of sound variations. This makes the laser transmitter significantly more accurate in outdoor silos or large indoor warehouses where temperature gradients are common and could otherwise cause measurement drift.
