FlexADOS 914

Multi-channel gas sensor system
FlexADOS 914


The multi-channel gas detector system FlexADOS 914 continuously monitors the ambient air and provides an early warning of harmful, explosive and non-flammable gases and vapours. Together with the GTR 210 gas transmitter family, FlexADOS 914 fulfils EN 50271:2011, achieves safety integrity level SIL1 and can be used for primary explosion protection.

Areas of application

  • Explosion protection chemicals industry
  • Paint and varnish manufacturing
  • Liquid gas storage facilities
  • Laboratories
  • Refrigerated warehouses (ammonia monitoring)
  • Refineries
  • Measurement of oxygen concentration
  • Gas-powered boilers
  • Wastewater treatment plants
  • and much more


  • Up to 12 analogue 4...20mA sensors are evaluated (GTR 210, LCTR 903, TOX 592)
  • Graphic LCD display to show actual values, mean values and faults in plain text
  • Indicator for operation, malfunction, maintenance, power failure
  • Simple menu-guided setting of the device parameters using 6-part keyboard
  • Three alarm thresholds per sensor, independently adjustable from 10 to 90% of the measuring range
  • Averaging from 1 to 60 minutes possible
  • Maximum of 14 potential-free changeover contacts to control further warning and control facilities
  • Potential-free changeover contact for malfunction, maintenance and power failure
  • As an option: Building control system connection for data transfer (measuring value and state)
  • Plastic wall housing (IP 54)
  • High operating reliability
  • Low power consumption
  • Simple assembly
  • Uninterrupted electricity supply possible

Measuring ranges

Gas types can be
adjusted as desired,
CH4 methane
H2 hydrogen
H2S hydrogen sulphide
CO2 carbon dioxide
physical unit
adjustable as desired,

Technical data

Sensors analogue 4...20mA 12 sensors
in a 2- or 3-wire system
Power supply 115 V / 60 Hz
230 V / 50 Hz (optional)
24 V / DC (optional)
max. power consumption 60VA
Operating conditions -13°F ...+113°F
0%...95% rel. humidity
Protection class due to housing (DIN EN 60529) IP 54
Dimensions (WxHxD) 11,8 x 9,06 x 4,73 inch
Displays Graphic LCD display 128x64 px
Background red/green/yellow
LED power, malfunction,
power failure, maintenance
digital inputs 3
analogue outputs 2 x power output 4...20mA
max. burden 400 ohm
digital outputs 17 relays
per 1 relay
Malfunction, power failure,
14 alarm relays
Potential-free change-over
Switching capacity max 250V / 8A
other interfaces USB
Universal FieldBus (option)
Weight approx. 3 lbs
Service life
Buffer battery clock
Service life
Parameter memory

> 10 years

> 20 years
Storage conditions max. 1 year
-13°F ...+113°F
0%...95% rel. humidity
EC type-examination according to
EX marking Ex II (2) G


Horn, warning light, blinker lamp, recorder, emergency power unit UPS 2000-24V, gas cooler, gas inlet, and much more. Additional accessories are offered on request depending on the measuring task.

Universal FieldBus

Optional data interfaces for building management systems (BMS)


• LONWorks

• Modbus RTU

• Profibus

• ModBus TCP

• TCP/IP (Webserver)