RM4210 RMU and Triton Test Station (SAT)


Bullhorn RM4210 Remote Monitor for Coupon Test Stations

Get instant notifications when AC load changes

We designed the RM4210 to help you diagnose AC current issues, monitor them over time, and optimize your AC corrosion mitigation systems. It offers:

  • Fully internal components
  • Easy installation and setup
  • Highly accurate readings

Plus, with Bullhorn Web, you can generate easy-to-read reports and graphs that will help you monitor important risk factors like AC current density over time.


Why Choose the RM4210?

  • Form factor – The RM4210 is a fully integrated unit that can be mounted on any AC/DC coupon test station. All components are internal, including the antenna, so it's easier to transport and install. It's also less likely to incur damage that will require a future repair visit.
  • Ease of installation and setup – Installing the RM4210 normally takes just a few minutes. Simply connect the pigtail to the test points, affix it to the top of the test station, and establish communications via Bluetooth using Bullhorn Tools Mobile. You can then use the Bullhorn Web asset manager to apply detailed configurations from the comfort of your office.
  • Accuracy – Be confident in the accuracy of your readings. With auto-calibration and auto-zero for every measurement, the RM4210 delivers readings with one percent of accuracy all the way through the range. For example, a 1 mV measurement will be accurate within ±10 microvolts. 
  • Reporting – Quickly identify problem areas and ensure mitigation effectiveness using flexible reports and graphs.
  • Value – We can bundle the RM4210 with the award-winning TRITON triple-coupon test station, so you order your AC monitoring equipment all at once.

Download Specifications

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Readings: AC current density, DC current density, AC pipe-to-soil, DC pipe-to-soil, pipe-to-soil, PCR AC current drain, instant off
DC voltage: +/- 100 V max
AC voltage: 0-100 V max
AC current: 0-200 mA max
Channel-to-channel isolation: > 200 V
Input impedance: 10 MΩ
Instant Off
Default IR drop edge delay: 200ms
Bullhorn Tools Mobile via Bluetooth Low Energy
SkyWave - Inmarsat satellite
Software Interface
Bullhorn Web
Bullhorn Tools Mobile for IOS
Temperature: -30° C to +70° C
Power Supply
Internal field-replaceable primary and secondary batteries
Battery life is 3-7 years when recording measurements hourly or daily with weekly transmissions
Additional DC input voltage: 10-24 V DC
AC Coupon :1 cm²
Test Coupon :100 cm²
Native Coupon :100 cm²
Reference Electrode: Stationary Copper / Copper Sulfate
Test point length: 6' 6"
Test point diameter: 3"
Lead length: 30 ft.
RM4210 with a test point adapter: 6.06” W, 8.22” H, 17” circumference
Data Integrity
Data stored in non-volatile (EEPROM) memory
Queued two-way communication (communication to the RMU is queued in Bullhorn Web and is sent the next time the unit wakes up to transmit)