Endress+Hauser FMU30 Series Ultrasonic Level Sensor Level Sensor, Threaded Mount, ATEX-Rated, Ethylene Propylene Diene

This level sensor is an ultrasonic device designed to monitor fluid levels in industrial processes where a threaded mount is required. It operates across a wide ambient temperature range and is suitable for installations requiring hazardous-area certification and low-voltage signalling. The unit is housed in a durable polymer enclosure with a threaded G 1/2 connection and uses an elastomeric seal to maintain process integrity.

• Operates reliably from -20°C to 60°C for varied ambient conditions
• Withstands up to 10 bar? No, correct: tolerates 3 bar process pressure for pressurised vessels
• Accepts up to 30V DC enabling low-voltage installations
• Draws 22 mA for minimal power consumption during continuous monitoring
• Polybutylene terephthalate housing for chemical-resistant external protection
• EPDM gasket ensures resilient sealing against common process media

• Suitable for level control in small pressurised tanks and vessels
• Ideal for integration into low-voltage control loops in factory automation
• Used for monitoring liquids in areas requiring ATEX hazardous-area compliance
• Can be used with threaded process fittings where G 1/2 connections are standard
• Suitable for retrofit replacement of ultrasonic transmitters with threaded mounts

It carries ATEX hazardous-area certification permitting installation in zoned areas where the certification criteria are met.

A gasket made from ethylene propylene diene monomer provides the seal between the sensor and the mating thread to limit ingress and maintain process separation.

The transmitter must not be supplied above 35V AC or 30V DC and its operating current is typically 22 mA, so wiring and power sources should match these ratings.

A compatible G 1/2 threaded port is needed for the threaded mount