LC Sound

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 (e.g. an electronic flow controller). Its technology guarantees accurate deliveries with no pressure drop, both in terminal and truck installations. The LC Sound utilizes ultrasonic energy to detect the presence or absence of air/gas: high frequency sound waves are easily transmitted in the presence of liquid media but are attenuated when gas is present. The sensor utilizes 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. The algorithm of the electronic controller guarantees an accurate air detection in a maximum time of 50ms, and automatically compensates the ageing of components, quality of the product, and flange size without periodic maintenance or field calibration.

Main 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
• Can react to emulsified air in the delivery (foam detect)
• Works with petroleum-based products


• Electromagnetic compatibility EMC 89/336/CEE and successive laws
• Explosive atmospheres ATEX 94/9/CE
• Recommendations OIML (International Organization for Legal Metrology) R 117

Technical Specifications

Power Source 10-30 Vdc
Consumption < 1W
Protection Grade IP67
ATEX Certification EExd II C T6
Ambient Temperature Range  from -40°C to 85°C ( from -40°F to 185°F)
Operating Temperature Range from -20°C to 60°C (from -4°F to 140°F)
Output 1 output relay  (max 250V, 2°)
Response Time 50 ms
Material Aluminum alloy

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