
LC Sound 
Specifications Sheet 
The LC Sound is an ultrasonic air sensor, available 
with 2”, 3”, 4” square flange. It continuously 
monitors the presence of air/gas in a delivery, and 
upon detection of gas the output relay is opened. 
The typical application uses the output contact to 
control valve, pump or can be connected to a 
smart device. The technology guarantees accurate 
deliveries with no pressure drop, both in terminal 
and truck installations. The sensor uses an 
ultrasonic transceiver to transmit a high frequency 
pulse: the signal reaches the reflector placed on 
the other side of the flange and then comes back 
to the transceiver. The signal amplitude level is 
proportional to the presence of liquid: if air is 
detected, the output relay is opened. 
Features 
 Fast response time (50 ms)  
 Auto-calibration  
 No periodic maintenance needed  
 No moving parts  
 Low weight  
 Small dimensions give a neat to simple installation  
 Negligible pressure drop resulting in quick and economical 
deliveries 
 Eliminates the need of an “Air-check” valve after the meter (in 
the meter version with n° 2 LC Sounds) 
 Can react to emulsified air in the delivery (foam detect)  
 Works with petroleum based products 
Certifications 
Electromagnetic compatibility EMC 89/336/CEE and successive laws 
Explosive atmospheres ATEX 94/9/CE 
Recommendations OIML (International Organization for Legal Metrology) R 117 

Specifications 
Power supply  10-30 Vdc 
Power consumption  < 1W 
Degree of protection  IP67 
ATEX certification  Eexd II C T6 
Storage temperature  -40°C to 85°C (-40°F to 185 °F) 
Operating temperature  -20°C to 60°C (-4°F to 140°F) 
Output  1 output relay E.M. (max 250V, 2°) 
Intervention time  50 ms 
Material  Aluminium alloy 
Weight  1 kg (2.20 lbs) 
Dimensions 
Pipe 
Diameter 
2”  0 mm  S3050-4 
3”  0 mm  S3050-4 
4”  0 mm  S3050-4 
6”  48 mm  S3050-12 
8”  99 mm  S3050-13 
10”  150 mm  S3050-14 
12”  201 mm  S3050-15 
14”  252 mm  S3050-16 
16”  302 mm  S3050-17 
Extended Ultrasonic 
Reflector Lenght 
Part. No. 
SAMPI spa 
A unit of IDEX Corporation 
Via Amerigo Vespucci, 1 
55011 Altopascio (Lucca) – Italy 
Phone: +39 0583 24751 
Fax: +39 0583 264748 
www.sampi.it