Ultrasonic fuel sending unit

My fuel gauge isn't working and I noticed in the searay schematic, it mentions an ultrasonic fuel sending unit. I didn't unscrew the 5 bolts, but there a black cap on the top of the fuel unit. Does anyone know how to mess with this type? I'm not sure if this is a traditional type since I've

DIY Ultrasonic Fuel Gauge / Level Sensor

Southern California - 1989 Cabo Marine 266 CuddyCon

Non-Contact Ultrasonic Fuel Level Sensor for Gauge Boat Truck Oil Tank Indicator

Ultrasonic Fuel Sensor at Rs 7500/piece, Fuel Tank Level Sensor in New Delhi

Professional Made: Through the data display of the on board fuel consumption sensor system platform, the sensor can automatically determine how many

Ultrasonic Fuel Level Sensor, Stainless Steel Fuel Water Level Sensor Rainproof Non Contact Fuel Level Gauge Sensor for Automobile(RS323)

DIY Ultrasonic Fuel Gauge / Level Sensor

Analog Fuel Sensor - Wiki Knowledge Base

A SNMP & Modbus fuel sensor that monitors level of fuel inside generator or emergency power fueltanks.

Ultrasonic Fuel Level Sensor (SNMP/Modbus)

Ultrasonic Fuel Level Sensor, Stainless Steel Fuel

A SNMP & Modbus fuel sensor that monitors level of fuel inside generator or emergency power fueltanks.

Ultrasonic Fuel Level Sensor (SNMP/Modbus)

Ultrasonic Fuel Level Sensor Non-Contact Fuel Level Sensor Bluetooth Mobile App configuration For Fuel Level Gauge - AliExpress

Understanding Types of Fuel Level Sensors & their Benefits – DATOMS

Wanna know what your vehicle's fuel level is? Ultrasonic Fuel

DIY Ultrasonic Fuel Gauge / Level Sensor