General |
Manufacturer |
Siemens |
Supplier |
Siemens |
Product designation |
Ultrasonic level meter |
Brand name |
SITRANS Probe LU240 |
Type designation |
SITRANS Probe LU240 Ultrasonic level transmitter ideal for level, volume, and volume flow measurements. It works with liquids, slurries, and bulk materials up to 12 m (40 ft). |
Article number |
7ML51101GD074AF3 |
Net weight |
1.25 kg |
Slogan |
The ultrasonic level transmitter for all level, volume and volume flow demands and every challenging environment. |
Mode of operation and application |
Measuring principle |
ultrasonic |
Operating frequency of the sensor |
54 kHz |
Beam angle |
10 Degree |
Input |
Measurand |
Level |
Volume flow |
Volume |
Measuring range |
Measuring range |
0.2 m ... 12 m |
Measuring range |
-40 °C ... 85 °C |
Temperature compensation |
-40 °C ... 85 °C |
Output |
Current output |
Number of outputs |
1 |
Signal range |
4 ... 20 mA |
Failure signal (minimum) |
3.55 mA |
Failure signal (maximum) |
22.8 mA |
Operating conditions |
Medium temperature |
-40 °C ... 85 °C |
Degree of pollution |
Pollution degree 4 |
Standard for the degree of pollution |
IEC 61010-1 |
Overvoltage class |
Installation category I |
Standard for the overvoltage class |
IEC 61010-1 |
Pressure |
Operating pressure, relative |
-0.2 bar ... 0.5 bar |
Environmental conditions |
Ambient temperature during operation |
-40 °C ... 80 °C |
Ambient temperature during storage |
-40 °C ... 85 °C |
Ambient temperature during transport |
-40 °C ... 85 °C |
Installation altitude MSL (maximum) |
5,000 m |
Relative humidity during operation |
0 ... 100 |
Degree of protection |
IP rating |
IP66 |
IP68 |
Electromagnetic compatibility EMC |
Standard for EMC |
IEC 61326-1 |
EN 55011 |
Structural Design |
Mechanical design |
Design of the device |
compact version, sensor integrated |
Process connection |
Design |
male thread |
Standard |
ANSI B1.20.1 |
Nominal size |
2" NPT |
Material |
Process connection |
Material |
polyvinylidene-fluoride (PVDF) |
Enclosure |
Material |
Polycarbonate (PC) |
Polybutylene terephthalate (PBT) |
Material of the lid |
polycarbonate (PC) |
Polybutylene terephthalate (PBT) |
Sensor |
Material of the sensor |
polyvinylidene-fluoride (PVDF) |
Material of the active surface of the ultrasonic transmitter |
Polyvinylidene fluoride (PVDF) |
Cable entry & cable gland |
Material of the cable entry |
polyamide (PA) |
Electrical connections |
Connection technology |
2-wire technology |
Potential insulation |
galvanic |
Potential insulation |
to all inputs |
to all outputs |
to all supplies |
Number of cable entries |
2 |
Design of the cable entry |
M20 x 1.5 |
Number of conductors of the connection cable |
2 |
Display and operating controls |
Display |
with display |
Design of the display |
LCD |
alphanumeric |
Number of digits of the display |
5 |
Operating controls |
Pushbutton |
Number of controls |
4 |
Power supply |
Electrical |
Type of power supply |
External |
Voltage type |
DC |
Nominal voltage, DC |
24 V |
Supply voltage, DC |
10.5 V ... 30 V |
Communication |
Protocol |
HART |
Protocol version |
Version 7 |
Programming |
SIMATIC PDM Software |
Certificates and approvals |
Verification of suitability |
CE |
CSA us/c |
KC |
EAC |
RCM |