Pepperl Fuchs LUC-M40

Ultrasonic Level Sensor

MPN: LUC-M40
Category: Ultrasonic Level Sensors

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What is the Pepperl Fuchs LUC-M40?

Device for non-contact level measurement

Measuring range up to 10 m in fluids

Measuring range up to 5 m in bulk materials

Quick and simple commissioning via menu-guided onsite operation with four-line display

Optional remote display and operation (up to 20 m from transmitter)

Integrated temperature sensor for automatic correction of the temperature dependent sound velocity

Device for non-contact level measurement, Measuring range up to 10 m in fluids, Measuring range up to 5 m in bulk materials, Quick and simple commissioning via menu-guided onsite operation with four-line display, Optional remote display and operation (up to 20 m from transmitter), Integrated temperature sensor for automatic correction of the temperature dependent sound velocity

Specifications

General specifications

Order code (Pepperl+Fuchs part number)	272185
Measuring method	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.
Equipment architecture	4 ... 20 mA output with HART protocol
Construction type	compact device
Series	LUC-M40
Lifecycle	Active (current Pepperl+Fuchs product)

Supply

Connection	2-wire , 4 ... 20 mA , HART protocol , 14 ... 30 V DC
Rated voltage	14 ... 30 V DC , 8 V DC at 20 mA Ur
Ripple	47 ... 125 Hz , Upp = 200 mV (measured at 500 Ω)
Noise	0.5 ... 10 kHz , Urms = 2.2 mV (measured at 500 Ω)
Current consumption	3.6 ... 22 mA
Power consumption	51 ... 800 mW

Input

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
Measuring range	max. 10 m (32.8 foot) in fluids max. 5 m (16.4 foot) in bulk materials
Operating frequency	approx. 42 kHz
Blocking distance	0.4 m

Output

Load	min. 250 Ω for HART communication
Linearity	The linearization function of the device allows conversion of the measured value into any unit of length or volume. In open channels or measuring weirs, also a flow linearization is possible (calculation of the flow from the measured level).
Output signal	4 ... 20 mA with HART protocol
Output damping	0 ... 255 s , freely selectable
Signal on alarm	error information can be accessed via the following interfaces: - on-site display (error symbol, error code and plain text description) - current output (configurable) - digital interface

Directive conformity

Electromagnetic compatibility: Directive 2014/30/EU	EN 61326-1:2006 , EN 61326-2-3:2006 , EN 61326-2-5:2006
Low voltage: Directive 2014/35/EU	EN 61010-1:2001

Conformity

Electromagnetic compatibility	NE 21
Degree of protection	IEC 60529:2001
Vibration resistance	EN 60068-2-64
Climate class	EN 60068-2-38 (test Z/AD) DIN/IEC 68 T2-30Db
Resistance to alternating temperature cycles	EN 60068-2-14

Measurement accuracy

Reaction time	min. 2 s
Reference operating conditions	temperature = 20 °C (68 °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
Measured value resolution	2 mm
Measuring frequency	max. 0.5 Hz
Maximum measured error	typical specifications for reference operating conditions (include linearity, repeatability, and hysteresis): ± 4 mm (0.16 inch) or 0.2% of set measuring range (empty calibration)1) 1)whichever is greater

Operating conditions

Installation conditions	see technical information (TI)
Ambient conditions: Resistance to alternating temperature cycles	Nb test: +80 °C/- 40 °C (353 K/233 K), 1 K/min, 100 cycles
Ambient conditions: Vibration resistance	20 ... 2000 Hz, 1 (m/s2)2/Hz; 3 x 100 min
Process conditions: Process temperature	-40 ... 80 °C (-40 ... 176 °F)
Process conditions: Process pressure (static pressure)	0.7 ... 2.5 bar (10.2 ... 36.3 psi) , absolute pressure

Ambient conditions

Ambient temperature	-40 ... 80 °C (-40 ... 176 °F) see technical information (TI)
Storage temperature	-40 ... 80 °C (-40 ... 176 °F)

Mechanical specifications

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)
Connection	cable gland M20x1.5 cable gland NPT1/2 cable gland G1/2
Material	material in contact with process: 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
Mass	3 kg
Dimensions	see section dimensions
Process connection	- cylindrical thread G1-1/2B, G2B to DIN/ISO 228/1 - conical thread NPT1-1/2, NPT2 to ANSI B 1.20.1 - flanges to EN 1092-1 from DN80, to ANSI B 16.5 from 3 inch, to JIS B 2238 (RF) from DN80 - mounting bracket LUC-Z17

Data for application in connection with hazardous areas

EU-type examination certificate

see instruction manuals

Mechanical construction

Construction type

housing design: - F12 housing with sealed terminal compartment for standard or EEx ia applications - T12 housing with separate terminal compartment and flameproof encapsulation cover: - version without on-site display - version with on-site display (transparent cover), this version cannot be supplied together with the ATEX II 1/2D certificate

Indication and operation

Display elements	display and operating module LUC-Z15 at the device
Control elements	on-site operation: - via 3 keys of the display and operating module - via handheld terminal remote control: - operation with operating program (for communication variant HART)

General information

Supplementary documentation	technical information (TI) manuals, brief instructions (BA, KA) instruction manuals control drawings (ZD)
Supplementary information	Observe the certificates, declarations of conformity, instruction manuals, and manuals where applicable. For information see www.pepperl-fuchs.com.

Accessories

Designation

- LUC-Z17, mounting bracket - LUC-Z3*, mounting frame - LUC-Z5*, wall bracket - LUC-Z15, display and operating module for on-site operation - LUC-Z16, weather protection cover

Downloads & documentation

Official documents from Pepperl Fuchs, downloaded directly from the manufacturer.

Data sheets & manuals

Certificates (4)

LUC-M40: frequently asked questions

When can LUC-M40 be shipped?

LUC-M40 is sourced on request — request a quote and we'll confirm the exact availability and shipping timeline for this specific unit.

Can I pick up LUC-M40 in person?

Local pickup from our Groningen, Netherlands warehouse may be possible — contact us before ordering to check availability and arrange a collection time.

Is express delivery available?

Yes — mention it when you request a quote for LUC-M40 and we'll include express shipping options in our reply.

My factory is down and I need this urgently — can you help?

For a critical breakdown, contact us directly at +31 (0)50-7110348 or sales@partnerplc.com — we can look into same-day courier or dedicated taxi/hotshot delivery for LUC-M40, subject to availability and destination.