The MB7789 4-20SC-MaxSonar-WRMI is a rugged, weather-resistant ultrasonic distance sensor with self-cleaning capability, designed for outdoor applications in high-moisture or condensation-prone environments. It provides millimetre-resolution distance readings from 500mm to 5000mm using a 4–20mA analogue current output (20mA at minimum range, 4mA at maximum range).

The self-cleaning feature helps reduce the impact of condensation and frost when the sensor runs continuously in closed or humid environments. The sensor is housed in a compact, IP67-rated PVC enclosure compatible with standard 3/4-inch PVC pipe fittings, and uses advanced signal processing for reliable readings in noisy conditions.

Key Features

• Self-Cleaning – Reduces impact of condensation and frost buildup
• Weather Resistant – IP67-rated PVC housing for outdoor use
• 4–20mA Output – Industry-standard analogue current interface
• Millimetre Resolution – ~1.6mm measurement resolution
• Long Range – 500mm to 5000mm detection range
• Intelligent Target Selection – Reports distance to the largest acoustic return, ignoring clutter
• Factory Calibrated – Narrow beam pattern for reliable long-range detection

Specifications

• Model – MB7789
• Operating Voltage – 10–32V
• Operating Current – 40mA
• Detection Range – 500–5000mm (objects closer than 500mm typically read as 500mm)
• Resolution – ~1.6mm
• Read Rate – 0.6Hz
• Ultrasonic Frequency – 42kHz
• Output – 4–20mA analogue current
• Operating Temperature – −40°C to +65°C
• Ingress Protection – IP67
• Compliance – RoHS, CE

Ideal For

• Outdoor tank and bin level monitoring
• High-moisture and condensation-prone environments
• Industrial distance measurement
• Automated fill-level detection

Package Contents

• 1× MB7789 4-20SC-MaxSonar-WRMI ultrasonic sensor

Resources

• 4-20SC-MaxSonar-WR Datasheet (PDF)