MB7780 4-20SC-MaxSonar-WRI

Industrial Outdoor High Performance Self-cleaning Ultrasonic Precision Rangefinders

Product Description

The weather resistant 4-20SC‑MaxSonar‑WRI is a rugged, ultrasonic sensor component module that features the industry standard 4-20mA analog current interface. This outdoor sensor provides very short- to long- distance detection and ranging in a compact, robust PVC housing. This ultrasonic sensor meets the IP67 water intrusion standard and is available in multiple packaging types.

High-output, acoustic power, combined with continuously variable gain, real‑time background automatic calibration, real‑time waveform signature analysis, and noise rejection algorithms results in virtually noise‑free distance readings. This holds true even in the presence of many of the various acoustic or electrical noise sources. The 4‑20SC‑MaxSonar-WR sensors are factory calibrated to match narrow sensor beam patterns and provide reliable long-range detection zones.

The MB7780 features an effective self-cleaning capability designed to reduce the impact of condensation in closed or high-moisture (dew, frost, etc.) environments. This sensor is a cost-effective solution for applications where precision range-finding, low-voltage operation, space saving, low-cost, self-cleaning, and weather resistance (IP67) rating is needed.

The MB7780 4-20SC‑MaxSonar‑WRI outputs a 20-4mA signal for PLC integration. A 20mA output signifies that the sensor is reporting the minimum reported distance of 50cm, where as a 4mA signal signifies the sensor is reporting the maximum reported distance of 500cm.

Additional Chemical Resistance Available

The F-Option (IP-68) design modification provides our weather resistant sensors with extra protection against corrosive chemical environments. Ask for the F‑Option (IP-68) when ordering.

Product Specifications

  • Resolution of ~1.6mm
  • Analog current output of 4-20mA
  • 0.60Hz read rate
  • 42kHz ultrasonic sensor measures distance to objects
  • RoHS compliant
  • CE compliant
  • Internal or external temperature compensation
  • Virtually no sensor dead zone, objects closer than 50cm typically range as 50cm
  • Maximum Range of 5-meters (196 inches)
  • Operates from 10V-32VDC
  • <40mA average current requirement
  • Small, light‑weight module
  • Designed for easy integration into your project or product
  • Operational temperature -40°C to +65°C (-40°F to +149°F)
  • Real-time automatic calibration (voltage, humidity, and ambient noise)
  • Firmware filtering for excellent noise tolerance and clutter rejection
  • Weather resistant (IP67), optional chemical resistant F-Option
  • Available in multiple housing and threading types: 3/4 inch NPS, 1 inch NPS, 1 inch BSPP, 30mm1.5
  • Long, narrow detection zone
  • Base sensor that is great for application testing
  • 20mA is the minimum reported range and 4mA is maximum reported range
  • Retail Price: $199.95
  • Volume Pricing (100 or more units): Contact MaxBotix Inc.

Product Documentation

Documents and Downloads

MB7780 Datasheet 4-20SC-MaxSonar-WRI-datasheet
Sensor Selection Guide Sensor Selection Guide
RoHS Conformity RoHS Declaration of Conformity
CE Declaration of Conformity CE Declaration of Conformity
Reliability Demonstration MTBF Report
High Resolution Pictures High Resolution Pictures.zip

Product 3D Models

These 3D model files will download with a different product name.
1″ BSPP Housing
Keyshot File IGES File ACIS 7.0 File Solid Works Part
STL File Step File ParaSolid File  
1″ NPS Housing
Keyshot File IGES File ACIS 7.0 File Solid Works Part
STL File Step File ParaSolid File  
30mm 1.5 Housing
Keyshot File IGES File ACIS 7.0 File Solid Works Part
STL File Step File ParaSolid File  

Part Numbers

All part numbers are a combination of a six-character base followed by a dash and a three-digit product code. Please review the following table for more information on the three-digit product code.

M B 7 7 8 0 1 0 0
Housing Style
0 Not Applicable
1 3/4″ NPS WR
2 3/4″ NPS WRC
3 Ultra Compact
4 Ultra Compact Flush Mount
5 1″ NPS
6 1″ BSPP
7 30MM 1.5
8 Extended Horn
Options Selected
0 No Options (Bagged)
1 F-Option
2 P-Option
3 F-Option and P-Option
4 No Options (Trayed)
5 TTL (Bagged)
6 TTL (Trayed)
Wire Attach
0 No Wire Attach
1 Wire Attached

The following table displays all of the active and valid part numbers for this product.

Active Part Numbers
MB7780-100 MB7780-101 MB7780-110 MB7780-111
MB7780-120 MB7780-121 MB7780-130 MB7780-131
MB7780-200 MB7780-201 MB7780-210 MB7780-211
MB7780-220 MB7780-221 MB7780-230 MB7780-231
MB7780-500 MB7780-501 MB7780-510 MB7780-511
MB7780-520 MB7780-521 MB7780-530 MB7780-531
MB7780-600 MB7780-601 MB7780-610 MB7780-611
MB7780-620 MB7780-621 MB7780-630 MB7780-631
MB7780-700 MB7780-701 MB7780-710 MB7780-711
MB7780-720 MB7780-721 MB7780-730 MB7780-731


The legacy part number MB7787 is now contained within MB7780 which is the base for all housing options on this product. To select a product with a legacy part number, select the desired housing option on the product with the appropriate base. Please review the following table for more information.

Legacy Part Number Base and Housing Active Part Number
MB7787 – Compact MB7780 in 3/4″ NPS WRC Housing MB7780-2XX
MB7787 – 1″ NPS MB7780 in 1″ NPS Housing MB7780-5XX
MB7787 – 1″ BSPP MB7780 in 1″ BSPP Housing MB7780-6XX
MB7787 – 30mm1.5 MB7780 in 30MM 1.5 Housing MB7780-7XX