MB7851 TankSensor

• Resolution of 1 mm
• ~2Hz read rate
• 42kHz Ultrasonic sensor measures distance to objects
• RoHS Compliant
• Read from all 3 select sensor outputs: Analog Voltage, Serial, Analog Envelope
• Operates from 3.0-5.5V
• Low 1.8mA average current requirement
• Light weight module
• Designed for easy integration into your project or product
• Operational Temperature from -40˚C to +65˚C (-40˚F to +149˚F)
• Real-time automatic calibration (voltage, humidity, ambient noise)
• Firmware filtering for better noise tolerance and clutter rejection
• 20+ Years Mean Time Between Failure
• Weather Resistant (IP67), optional Chemical Resistant F-Option
• Sensor connection end matches standard electrical 3/4-inch PVC pipe fittings for easy mounting (3/4″ National Pipe Thread Straight)
• Horn opening matches standard 2-inch PVC pipe fittings for easy mounting (2″ National Pipe Thread Straight)
• Our advanced weather resistant, ultrasonic sensor
• Additional stability filter rejects occasional anomalous readings
• Detects the largest signal return in the field of view
• Uses the complete dynamic range of the sensor, if no large targets are present the sensor will select the next smallest target in view
• Can be used to range large objects behind small obstructions
• Analog envelope output for easy troubleshooting and signal processing
• Maximum range of 5000 mm (196 inches)
• Long range, narrow detection zone

Features of the weather-resistant MB7851, Tank Sensor, includes millimeter resolution, short to long-distance detection, range information from 50 mm to 5000 mm for liquid level detection, a ~2Hz read rate, and three simultaneously available outputs: a real-time analog voltage envelope, a scaled analog voltage, and serial communication in either RS232 or TTL format.

The MB7851 Tank Sensor is a low‑cost liquid-level monitoring sensor that uses ultrasonic technology for non-contact sensing. The MB7851 is designed to be an easy-to-use sensor for applications where liquid-level detection is desired. This sensor is great for use in containers that are typically difficult for ultrasonic devices such as tanks, barrels, and bins. This is because the MB7851 has a teach feature (only available if using serial communication), that can train the sensor to what an empty container looks like. This helps allow the sensor to range properly even in the presence of otherwise detectable obstructions like corrugation.

The MB7851 is factory calibrated to match sensor beam patterns and provide reliable long-range detection zones.

In addition, the MB7851 offers virtually noise-free distance readings through the use of high-output acoustic power combined with continuously variable gain, real‑time background automatic calibration, real‑time waveform signature analysis, and noise rejection algorithms. This holds true even in the presence of many of the various acoustic or electrical noise sources.