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4-20SC‑MaxSonar‑WR Products

MB7780 4-20SC-MaxSonar-WRI

Industrial Outdoor High Performance Self-cleaning Ultrasonic Precision Rangefinders


F-Option for Chemical Resistance * – optional

P-Option for Corrosion Resistance * – optional

Shielded Cable Attach Option *
(per each) – optional

Additional Wire Length – optional

(1ft = 1 Qty)

Grand total:
Quantities > 25 may delay ship date up to 1 week.
Options with * may delay ship date up to 2 weeks.
Applicable for all variations of this product
QuantityCost Per Product
5 - 9$189.95
10 - 49$179.95
For 34 Nps Wrc Housing & 34 Nps Wr Housing
QuantityCost Per Product
50 - 99$156.47
For 1 Nps Housing & 1 Bspp Housing
QuantityCost Per Product
50 - 99$157.97
For 30mm 1 5 Housing
QuantityCost Per Product
50 - 99$159.47

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 design modification provides our weather resistant sensors with extra protection against corrosive chemical environments. Ask for the F‑Option when ordering.

Product Specifiations

  • 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 Datasheet4-20SC-MaxSonar-WRI-datasheet
Sensor Selection GuideSensor Selection Guide
RoHS ConformityRoHS Declaration of Conformity
CE Declaration of ConformityCE Declaration of Conformity
Reliability DemonstrationMTBF Report
High Resolution PicturesHigh Resolution

Product 3D Models

These 3D model files will download with a different product name.
1″ BSPP Housing
Keyshot FileIGES FileACIS 7.0 FileSolid Works Part
STL FileStep FileParaSolid File 
1″ NPS Housing
Keyshot FileIGES FileACIS 7.0 FileSolid Works Part
STL FileStep FileParaSolid File 
30mm 1.5 Housing
Keyshot FileIGES FileACIS 7.0 FileSolid Works Part
STL FileStep FileParaSolid 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.

Housing Style
0Not Applicable
13/4″ NPS WR
23/4″ NPS WRC
3Ultra Compact
4Ultra Compact Flush Mount
51″ NPS
61″ BSPP
730MM 1.5
8Extended Horn
Options Selected
0No Options (Bagged)
3F-Option and P-Option
4No Options (Trayed)
5TTL (Bagged)
6TTL (Trayed)
Wire Attach
0No Wire Attach
1Wire Attached

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

Active Part Numbers


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 NumberBase and HousingActive Part Number
MB7787 – CompactMB7780 in 3/4″ NPS WRC HousingMB7780-2XX
MB7787 – 1″ NPSMB7780 in 1″ NPS HousingMB7780-5XX
MB7787 – 1″ BSPPMB7780 in 1″ BSPP HousingMB7780-6XX
MB7787 – 30mm1.5MB7780 in 30MM 1.5 HousingMB7780-7XX