Hydrogen / Flammable Gas monitoring system in battery, inverter charging room – to prevent explosion

ALVI Automation also trading as GasAlarm in association with ALVI Technologies Sydney Australia brings to you a complete Automation solution along with the best selling product in terms of quality and reliability MSR GmbH Hydrogen sensor transmitter.

Hydrogen sensor transmitter specifications:

  • Should have Catalytic (pellistor) based sensor cell, with catalytic bead
  • Should have a measuring range of minimum 0-100% LEL (lower explosive limit) for flammability monitoring, with no poisoning effect of background gases
  • Should have a catalyst capable of providing flashing point, at a lower temperature, for the sensor cell.
  • Should have microprocessor-based value processing with temperature, vibration, moisture, humidity etc compensation reading
  • Should have high accuracy, high repeatability, high reliability
  • Should be a 3-wire connection for power supply and signal output.
  • Should have jumper selectable analog output: 0-10V, 2-10V, 0-20mA, 4-20mA
  • Should have linear and proportional signal output.
  • Should have low response time: t50 < 3 s; t90 < 10 s /methane
  • Should have Low voltage operation: 24V AC / DC
  • Should have low power consumption: 35 mA, max. (0.85 VA)
  • Should be wall mountable without need of further mounting brackets etc.
  • Should have replaceable sensor cell and PCB for easy service and replacement
  • Should have life expectancy of > 3 years, replaceable sensor cell
  • Should capable of mounting in any direction, with no effect on performance, output and life of these sensors (no orientation problems)
  • Should have poisoning protection, against background gases, lead vapours, dust etc
  • Should have overflooding protection
  • Should have reverse polarity and short circuit protection
  • Should capable for field calibration
  • Should have minimum IP65 protection
  • Should have vibration protection (High frequency, low amplitude) and knock protection (high amplitude, low frequency)
  • Should have fast response time
  • Should have IMMUNITY TO RF/FM INTERFERENCE as per the guidelines of EMC- Directive 2004/ 108/ EEC
  • Should be Approved according to EN 61010-1; ANSI/UL 61010 1; CAN/CSA-C22.2 No. 61010-1
  • Should have Digital method  for calibration
  • Should have enclosure flammability in accordance to UL 94 V2

Smart Central monitoring cum control system:


  • Should be based on PLC or microprocessor based system with pre-defined logic retention capacity.
  • Should have LCD Display
  • Should be able to expand analog input channel with help of slave or expansion module. No need to replace or change whole monitoring system
  • should have free configurable set points at every channel input
  • Should have the facility to temporary disable any channel with a key press, for maintenance mode etc.
  • Should have sufficient potential free (230VAC, 5A) relays. Should able to expand the number of relays with help of slave/expansion modules.
  • Relays should capable of the soft program, with one-to-one, one-to-many, many-to-one configuration with any channel set-points.
  • Should be provided with contactor arrangement for operation, protection of exhaust fans, etc
  • Should have overload protection arrangement
  • Should have fault LED
  • Auto-diagnostic watchdog with built-in error code, fault LED indication informing about the type of system error/fault
  • Should have a password for protection against any unauthorized system access.
  • Simple English Menu driven (system error, status alarm, status relay, MP parameter etc)
  • Configurable relay parameters: energized, de-energized, latching, non-latching
  • Should have provision/option for BMS integration via a digital network.


Control & warning logic:

H2 concentration Action
0-15% LEL No action. Display readout
>25% LEL (or as advised by the client) Start exhaust system (to reduce gas concentration)
> 50% LEL (or as advised by the client) Switch on Flasher & Alarm system (to start evacuation)

For more details please contact us or mail us at info@alviautomation.com