Pepperl+Fuchs LUC-M**
Ultrasonic Level Sensor
- Quick and simple commissioning via menu-guided onsite operation with four-line display
- Envelope curves on the on-site display for simple diagnosis
- Linearization function (up to 32 points) for conversion of the measured value into any unit of length, volume or flow rate
- Non-contact measurement method minimizes service requirements
- Optional remote display and operation (up to 20 m from transmitter)
- Integrated temperature sensor for automatic correction of the temperature dependent sound velocity
Item Number:
LUC-M**
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- Overview
- Comments
| Measurement range | LUC-M10: max. 5 m (16.4 ft) in fluids and 2 m (6.6 ft) in bulk materials LUC-M20: max. 8 m (26.2 ft) in fluids and 3,5 m (11.5 ft) in bulk materials LUC-M30: max. 15 m (49.2 ft) in fluids and 7 m (23 ft) in bulk materials LUC-M40: max. 10 m (32.8 ft) in fluids and 5 m (16.4 ft) in bulk materials |
| Electrical connection | terminal compartment: In the F12 housing, the terminals are located underneath the housing cover, in the T12 housing, they are under the cover of the separate terminal compartment. cable gland: M20x1.5 (recommended cable diameter 6 ... 10 mm (0.24 ... 0.4 inch)) cable entry G1/2 or NPT1/2 PROFIBUS PA: M12 plug connector |
| Degree of protection | with closed housing, tested according to - IP68, NEMA 6P (24 h at 1.83 m under water surface) - IP66, NEMA 4X with open housing: IP20, NEMA 1 (also ingress protection of the display) |
| Type of protection | |
| Material | material in contact with process: - LUC-M10, LUC-M20: sensor PVDF, seal EPDM - LUC-M30: sensor UP and stainless steel 1.4571/316Ti, seal EPDM, flange PP or stainless steel 1.4571/316Ti - LUC-M40: sensor PVDF, seal Viton or EPDM, flange PP, PVDF or stainless steel 1.4535/316L housing: aluminum, seawater resistant, chromated, powder-coated cover: - aluminum, for version without on-site display - inspection glass for version with on-site display |
| Measuring frequency | 2-wire devices: max. 0.5 Hz 4-wire devices: max. 2 Hz dependent on the type of device and the parameter settings |
| Supply voltage | 2-wire HART (standard): - current consumption 4 ... 20 mA - min. terminal voltage 14 V (at 4 mA), 8 V (at 20 mA) - max. terminal voltage 36 V 4-wire HART: - DC version: voltage 10.5 ... 32 V, max. load 600 andOmega; - AC version: 90 ... 253 V, max. load 600 andOmega; PROFIBUS PA: 9 ... 32 V DC for additional information see technical information |
| Explosion-hazardous area | KEMA 05 ATEX 1111, KEMA 05 ATEX 1112 , for additional certificates see www.pepperl-fuchs.com |
| Equipment architecture | 4 ... 20 mA output with HART protocol system integration via PROFIBUS PA |
| Current consumption | 2-wire devices: - HART: 3.6 ... 22 mA - PROFIBUS PA: max. 13 mA |
| Reaction time | depends on the parameter settings: - min. 0.5 s for 4-wire devices - min. 2 s for 2-wire devices |
| Reference operating conditions | temperature = 20 В°C (68 В°F) pressure = 1013 mbarabs humidity = 50 % ideal reflective surface (e. g. calm, smooth fluid surface) no interference reflections within signal beam set application parameters: - tank shape = flat ceiling - medium property = liquid - process conditions = calm surface |
| Output signal | according to the instrument version: - 4 ... 20 mA with HART protocol - PROFIBUS PA |
| Mass | LUC-M10: approx. 2.5 kg LUC-M20: approx. 2.6 kg LUC-M30: approx. 3.5 kg LUC-M40: approx. 3 kg |
| Installation conditions | see technical information (TI) |
| Maximum measured error | typical specifications for reference operating conditions (include linearity, repeatability, and hysteresis): В± 2 mm (0.08 inch) or 0.2% of set measuring range (empty calibration)1) 1) whichever is greater |
| Dimensions | see section dimensions |
| Measured variable | distance between the sensor membrane and the product surface using the linearization function, the device calculate - level in any units - volume in any units - flow across measuring weirs or open channels in any units |
| Measured value resolution | LUC-M10, LUC-M20: 1 mm (0.04 inch) LUC-M30, LUC-M40: 2 mm (0.08 inch) |
| Measuring principle | The sensor of the device transmits ultrasonic pulses in the direction of the product surface. There, the ultrasonic pulses are reflected back and received by the sensor. The device measures the time between pulse transmission and reception. The instrument uses the time (and the velocity of sound) to calculate the distance between the sensor membrane and the product surface. As the device knows the empty distance from a user entry, the device calculate the level. |
| Power consumption | 2-wire: 51 ... 800 mW 4-wire AC: max. 4 VA 4-wire DC: 0.6 ... 1 W |
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