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Sentry-2402 Battery Monitoring System


High precision Sentry battery monitor for 48V systems with 2V VRLAB

Sentry 2402W2 is a powerful battery monitoring system for Telecom -48V system with 2V cells up to 3,000Ah capacity. This compact battery unit combines superior data quality and flexible installation to address most cell site, central office and substation applications for effective remote battery management according to the IEEE updated standards:

IEEE Std. 1188 - 2005: Recommended Practice for Maintenance, Testing, and Replacement of Valve-Regulated Lead- Acid (VRLA) Batteries for Stationary Applications (IEEE Link)

IEEE Std. 450 - 2010: Recommended Practice for Maintenance, Testing, and Replacement of Vented Lead-Acid Batteries for Stationary Applications (IEEE Link)


Main Features

  • Super precise IR (Internal Resistance / Conductance) measurement for each cell
  • Discriminate inter-cell resistance measurement
  • 16-bit high resolution data acquisition
  • No mechanical relays, resulting high reliability for telecom applications
  • Industry standard Modbus/RTU communication for high reliability and quick integration
  • Compact design allows for easy installation on the top or inside of the battery cabinet.
  • Industrial grade reliable connections
  • Plug and play HMI panel (optional)
  • Full support to networking battery management system
  • Compatible with MyBattery Platform™ for web based remote monitoring.
  • Ambient and Pilot Battery Temperature Monitoring

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Sentry-2402W2 Datasheet

Other documents

Sentry-2402W2 Telecom 48V



Each Sentry-2402W2 monitors 1 string of 24x2V.
If a system has multiple strings, order one unit for each string.
Each unit comes with 2 temperature sensors for ambient and pilot temperature.

Unit comes with onboard Ethernet DTU. If wireless DTU is preferred, an activated SIM card (GSM) is needed.

Order O-ring leads, specify 6mm (1/4"), 8mm(5/16") or 10mm(3/8"). 

Order current sensor if needed. Default window size: 15mmx20mm, close loop 300A (peak current 600A). Other size/range and split-core sensor may have longer lead time.

A HMI touch display is recommended for field service. 

Optional 12-conductor 20AWG cable, calculate the length for order.


Battery Analyzer Software license comes with hardware order.

MyBattery Platform subscription is optional. Contact us for subscription fee.