WATCHMAN is a trailer-mounted wheel-end and tire monitoring system that provides real-time data on tire pressure, temperature, and vibration to improve fleet safety, uptime, and maintenance efficiency.

WATCHMAN

Realtime Data. Smarter Decisions.


Delivers real time tire and wheel end insights through a fully integrated system that helps fleets cut tire costs, prevent downtime, and make smarter maintenance decisions.



 

Intelligent Fleet Management

  • Engineered for direct compatibility with TIREMAAX® PRO and PRO-LB systems equipped with grease hubcaps

  • Hubcap-mounted, permanently installed sensors integrate into the TIREMAAX system to help prevent loss or theft— and no removal is required during tire service

  • Wireless connectivity combined with advanced diagnostics to help improve service efficiency and reduce downtime

  • Provides fleets with actionable insights for both critical and non-critical alerts

  • Enables simple, direct integration with wireless communication while supporting multiple sensor types

  • Larger capacity battery designed to last the life of the system

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How it Works



Sensors



WATCHMAN hub-cap mounted sensors deliver real-time tire pressure and wheel-end temperature data through Bluetooth®

Receiver



Data from the sensors is received by the wireless reciever is transmitted to the telematics system

Trailer Telematics



Data is seamlessly received and processed by compatible third-party telematics systems

Cloud Server



When paired with telematics, data is transmitted from the device to the cloud

Fleet Operations



The back-office telematics dashboard automatically receives trailer tire pressure, temperature data, and alerts

Maintenance



Actionable insights on wheel-end maintenance that can prevent costly downtime




Frequently Asked Questions



Unlike valve stem or strap mounted sensors, Hendrickson’s hubcap‑mounted design offers a cleaner installation, longer battery life and protection from road damage, all while working seamlessly with Hendrickson TIREMAAX® PRO or PRO‑LB tire pressure control systems and trailer telematics.

Yes. WATCHMAN technology can be added to existing trailers that are already equipped with TIREMAAX PRO or PRO‑LB tire pressure control systems with grease hubcaps. Simply replace the existing hubcap with the specially designed hubcap for WATCHMAN integration that includes the sensor. Additionally, a WATCHMAN receiver will need to be added and mounted near the TIREMAAX controller.

Yes. Fleets can use the Hendrickson WATCHMAN app for local monitoring. The app is available on iOS or Android.

No subscription is required for Hendrickson equipment. However, please note that most telematics providers do require a subscription to interpret and display the data for customers. Please contact your telematics provider for more information.

OEM: Installed during suspension assembly.

Aftermarket: For current TIREMAAX PRO or PRO‑LB systems with grease hubcaps that don’t feature WATCHMAN technology, simply replace the existing TIREMAAX hubcaps with specially designed TIREMAAX hubcaps for WATCHMAN integration. No tire dismounting is required. Refer to Hendrickson publication T51007 WATCHMAN Installation and Service Procedures for complete installation instructions.

No, the current standard TIREMAAX PRO or PRO‑LB hubcap cannot be used with this sensor. A specially designed TIREMAAX PRO or PRO‑LB hubcap with additional holes allows it to communicate with the WATCHMAN sensor.

Customers should always contact Hendrickson Technical Services before performing any hubcap swaps to confirm proper installation procedures and maintain applicable Hendrickson warranty coverage.

Provides fleets with real‑time data to assist with pre‑trip inspections and diagnose tire and wheel‑end issues.

Hendrickson WATCHMAN App





  • Instant Bluetooth® pairing with QR/NFC registration on sensors for quick setup
  • Real-time wheel-end and tire condition updates at the touch of a button
  • Ideal for fleets without full telematics to support fast, confident trip inspections



    

 

VIEW WATCHMAN APP DEMO

 

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