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LM80 Intermediate Range Laser Level Transmitter
Brand: ABB GroupBased on pulsed laser technology, the LM80 embodies speed and accuracy in a single, easy to use and install product. Whether measuring a few meters into the confined space of a crusher, or to the bottom of the tallest silo, the LM80 with its laser pointer and long range is the plug-and-play solution to level measurement.
The LM80 features advanced timing and sophisticated signal processing for pinpoint accuracy at up to 100 m (330 ft.) for level applications and up to 150 m (500 ft.) for positioning applications.
Features- Maintenance free, non-contact continuous level sensor
- Range up to 100 m (330 ft) for level applications
- Range up to 150 m (500 ft) for positioning applicationsEasy and intuitive setup
- No calibration required
- Continuous level monitoring for granular solid materials and opaque liquids
- Measures solids and opaque liquids at any angle
- Last Pulse Detection for Measurement with Light and Moderate Dust
- Built-in laser pointer for accurate alignment in narrow or tall vessels
- Auto-ranging to measure all levels
- Available non condensing heated optics prevent condensation issues
- No Beam Divergence = No False Echoes
- Rugged and Robust Aluminum Enclosure
- CSA, ATEX and IECEx potentially explosive atmosphere ratings
Specifications
Brand
Range
- 0.5 m (1.5 ft) to 30 m (100 ft) - dark colored surfaces
- 0.5 m (1.5 ft) to 100 m (150 ft) - light colored surfaces
- 0.5 m (1.5 ft) to 150 m (500 ft) - reflective targets in positioning applications
Resolution
- ±10 mm (0.4 in)
Accuracy
- ±30 mm (1.2 in)
Update Rate
- 3 readings per second (maximum), 1 reading per minute (minimum)
Operating Temperature
- –40 °C to +60 °C (–40 °F to +140 °F)
- –40 °C to +45 °C (–40 °F to +113 °F) with non-condensing option (heated lens option (AC and SC))
- Note: While the initial (cold start) accuracy of the LM80 will be within specifications, a settling period of approximately 15 minutes is recommended to allow the electronics to warm up and the internal temperature to stabilize.
Survival Temperature
- -40 °C to +80 °C / -40 °F to +176 °F
Pressure
- 1 bar
Analog
- 4-20 mA, NAMUR compliant non-isolated and self powered
Digital (Relay)
- 2 SPST relays: 0.5 A at 120 VAC, 0.25 A at 250 VAC, 1 A at 24 VDC, 0.5 A at 60 VDC
Communication
- Standard male DB9 connector - RS232 for testing, troubleshooting and configuration19200 baud, 8 data bits, 1 stop bit, no parity, no flow control
Voltage
- 24 V DC typical (18 to 32 V DC)
Current
- 0.4 A peak, 0.2 A continuous
- 0.52 A peak, 0.32 A continuous with non-condensing optics
Base Plate Diameter
- Flange - 140 mm (5.51 in)
- Triclover - 120 mm (4.72 in)
Length
- Flange - 172 mm (6.77 in)
- Triclover - 166 mm (6.54 in)
Weight
- 316 Stainless steel enclosure - 4.2 kg (9.26 lbs)
- Aluminum enclosure - 1.6 kg (3.53 lbs)
- Aluminum enclosure with triclover - 2.2 kg (4.85 lbs)
Enclosure Material
- Powder coated aluminum standard, 316 stainless steel option
O-Ring Seal Material
- Buna-N (Nitrile Rubber)
Mounting / Process Connection
- Triclover - 316 Stainless steel plate with seal groove
- Flange - 4 holes, 8.5 mm (0.33 in) diameter on 120 mm (4.72 in) diameter circle
Total Optical Aperture
- 90 mm (3 in)
Measuring Laser Lens Diameter
- 25 mm (1 in)
Receiver Lens Diameter
- 50 mm (1.97 in)
Lens Material
- Acrylic
Lens Impact Resistance
- Impact tested at 4 joule
Beam Divergence
- Δ < 0.3°
Beam Direction
- 90° ± 1° from mounting flange
Measuring Laser
- 905 nm near infrared pulsed semiconductor laser
- 12 mW average power output
- 20 W peak power output
Pointing Laser
- 635 nm red semiconductor laser
- 3 mW continuous
Measuring Laser Life Expectancy
- 25 years typical MTBF
Measuring Laser Safety
- Always on IEC60825-1 class 1M laser
- A class 1M laser is safe for all conditions of use except when passed through magnifying optics. This means the maximum permissible exposure cannot be exceeded when viewing the laser with the naked eye without the aid of magnifying optics.
Pointing Laser Safety
- Intermittent IEC60825-1 class 3R laser
- Laser comes on at power up for 2 minutes, it can be turned back on for commissioning using the LCD2 communications and configuration device.
- A class 3R laser is considered safe if handled carefully, with restricted beam viewing. With a class 3R laser the maximum permissible exposure can be exceeded when viewing the laser with the naked eye, but with a low risk of injury.
Purge Air Flow
- Must be oil free dry airrecommended flow between 0.5 and 4 l/minute maximum pressure 5.5 bar (80 psi)
Purge Fitting
- 1/8 NPT
Enclosure Rating
- IP66/Nema 4X (Dust proof, can be washed down with high pressure hose)
Gas Rating
- This equipment can be used in flammable gases or vapor hazardous locations.
