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A cell voltage monitoring (CVM) system tailored for research, testing and practical application of H2 fuel cells. The CVM system protects the integrity of individual cells and provides valuable data for predictive maintenance planning and performance optimization.

CVM-32A modules and sets are designed as a cost-effective solution mainly for hydrogen fuel cells applications with limited voltage range.

These ready-to-use cell voltage monitor sets are easily integrated into specialized applications and allow direct connection to a PC via USB or to a PLC via RS-485 bus.

Explore our precision 2.5 V solutions with the CVM-64H module and sets, or 5 V solutions with the CVM-24P module and sets. For broader temperature and voltage monitoring requirements, consider our TEVOMET solutions.

Contact us for customized CVMs to meet your specific requirement.

For comparison of all series see Overview.


  • 32 channel per board
  • Basic channel voltage range ± 1.5 V
  • Maximum voltage span of all channels is 34 V
  • Multiple boards can be chained for > 32 cell stack, connector for easy adjacent cell chaining
  • Resolution 1 mV (12-bit)
  • Input impedance > 100 MΩ
  • Sample rate 100 sps
  • Cell connection via 34-pin IDC connector
  • Compatible with all other Kolibrik modules (KMS, DIN-rail I/O modules, Tevomet, ...), communication bus XC2/RS-485
  • IO (1x digital output, 1x digital input)
  • Available customizations: up to 3x opto-isolated inputs or outputs; additional opto-isolated UART; different channel voltage range; customized communication protocol; higher sample rate up to 1 ksps
  • Available accessories: power supply module for 12/24 VDC; USB & serial (RS-232) interface; Raspberry PI connection
  • Application examples: H2 fuel-cell tests stands, H2 fuel-cell application monitoring, Control systems


Out of Box sets

available in-stock for purchase in our eshop.

Buy CVM-32A sets

CVM-S32A 1x CVM-32A: 32 channels total, RS-485/USB, 1x output, 1x input, Out of Box Solution
CVM-S64A 2x CVM-32A: 64 channels total, RS-485/USB, 2x output, 2x input, Out of Box Solution
CVM-S96A 3x CVM-32A: 96 channels total, RS-485/USB, 3x output, 3x input, Out of Box Solution
CVM-S128A 4x CVM-32A: 128 channels total, RS-485/USB, 4x output, 4x input, Out of Box Solution
CVM-S160A 5x CVM-32A: 160 channels total, RS-485/USB, 5x output, 5x input, Out of Box Solution
CVM-E32A 1x CVM-32A: 32 additional channels, 1x output, 1x input, Extension for set

Custom-made sets

  • custom number of channels
  • optionally assembled into plastic enclosure
  • we can provide you with custom cables
  • on demand modifications possible - connectors, enclosure, software functions, communication protocols, ...
  • we offer redesign for mass production


CVM-24P - 24-channel Cell Voltage Monitor for H2FC stacks, voltage range ±5 V, precision automotive version with CAN

CVM-64H - 64-channel Cell Voltage Monitor for H2FC stacks, voltage range ± 2.5V

TEVOMET - Multi-channel temperature and voltage monitor / meter

KMS - Stackable modular system designed for size-restrained compact control solutions

Overview of all Cell Voltage Monitoring series


If you need more information or looking for specific solution or product, contact us through this form or on email sales@kolibrik.net!