Product Description

The Sentry-4412HV is an industrial grade battery health monitoring system designed specifically for medium size UPS systems with up to 44 blocks of either 12V or 16V batteries. This compact unit combines superior data quality with a flexible and streamlined installation, which makes it suitable for server rooms, data centers, and numerous other industrial applications.

IEEE standard reference:
IEEE-1188, IEEE Recommended Practice for Maintenance, Testing, and Replacement of Valve-Regulated Lead-Acid (VRLA) Batteries for Stationary Applications
IEEE-1184, IEEE Guide for Batteries for Uninterruptible Power Supply Systems
IEEE 1491-2012 IEEE Guide for Selection and Use of Battery Monitoring Equipment in Stationary Applications

Main Features

  • Digital Wavelet Technology. Precise IR (Internal Resistance / Conductance) online measurement is performed on each battery. User selectable internal resistance or conductance data display
  • Over Voltage Protection. Designed with over voltage input for each sampling channel
  • 600VDC. Allows the unit to be installed in a wide range of voltage applications
  • High Resolution. 16 bit high resolution provides for clear and precise data acquisition
  • Solid State Scanning. (rather than mechanical relay) provides the highest reliability for data center and industrial applications
  • Noise Immunity. Ensures accurate measurement on high ripple ups systems
  • Modbus/RTU Communication. Provides high reliability and ease of integration
  • Compact Design. Permits convenient installation on top, or inside the battery cabinet
  • Access Data/Alarm from Anywhere. Firewall friendly Battery Analyzer software, plug and play, easy to manage large number of sites from anywhere via internet. Alarming through email, SMS, and SNMP trap.
  • HMI Panel. The plug and play touch panel (optional) allows the technician to configure and calibrate without the need of a PC
  • Supports Site/Building Management Systems. The system fully supports 3rd party network battery management systems with SNMP, Modbus-TCP, and hyperlink to real-time data

Main measurements

  • Cell Voltage Monitoring
  • Cell Internal Resistance (IR) Monitoring
  • String Voltage Monitoring
  • String Charge & Discharge Current Monitoring
  • Integrated true RMS ripple current
  • Ambient Temperature Monitoring
  • Pilot Battery Temperature Monitoring


Power Supply
Power Input +12VDC, AC/DC adapter 100-240VAC input; Maximum Consumption: 10W
Isolation 2,500VDC@1min to battery string
Current/Temperature Measurement
Current Sensor Support  LEM current sensor with internal +/-12V power supplyDefault range +/- 400A, window size 20mmx15mm
D32mm and split core available
Accuracy 0.1% + sensor accuracy
Temperature Sensors 1 ambient temperature sensor, 1 pilot temperature sensor
Range Measurement range: -20 to 60ºC, operating range: 5ºC to 40ºC (41ºF to 104ºF)
Accuracy 1 ºC
Voltage Measurement
Channel Max 44 channels (configurable for less than 44 channels)
Bus Voltage Range: 0 – 600V; Accuracy: 0.1%
Input Range to Each Channel +/- 20V for 12V (44x12V) or 16V (33x16V) batteries
Accuracy 0.1%
Input Wiring 1-wire from (+) positive of each battery plus the (-) negative of last battery.
Internal Resistance / Conductance
Range and Resolution 0 to 30mΩ, 0.01 mΩ resolution
1-wire mode Total value of Internal Resistance + Connection Resistance.
Serial Port Isolated RS-232C and RS-485 interface
Protocol and Serial Settings MODBUS RTU, 9600-8-1-None
Modbus address 1 to 28, configurable with HMI
Ethernet Onboard Ethernet LAN connection to Battery Analyzer or MyBattery Platform
SNMP, Modbus TCP, email/SMS message, hyperlink to real-time data
Indication and Alarm
LED indication
  • Dual-color LEDs for status
  • Orange flashing LED for service alarm
  • Red LED for urgent alarm
Alarm Outputs Service Alarm (Normal Close, Voltage-free, 60V 0.1A capacity)Urgent Alarm (Normal Close, Voltage-free, 60V 0.1A capacity)

*Specifications subject to change without notice

If you are not sure what to order, please collect the following information and contact BatteryDAQ:

  1. Project description: application type, number of sites, battery banks for each site.
  2. Battery working mode: backup, cycling
  3. Number of cells/batteries per string
  4. Number of strings (in parallel) per bank
  5. Battery type/model, post size
  6. Battery/Rack layout
  7. Current range
  8. Communication: Ethernet or Cellular IoT
  9. Integration, SCADA etc.

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