FlexADOS 914 LON®

Measuring, control and warning unit for sensors
FlexADOS 914 LON®


The FlexADOS 914 LON® is a measuring, control and warning unit for gas sensors. It continuously monitors the ambient air and provides an early warning of harmful, explosive and non-flammable gases and vapours. Together with the TOX 914 LON® gas transmitters, FlexADOS 914 LON® fulfils VDI guideline 2053 from December 2014 and also EN 50271.

Areas of application

  • Garages and tunnels
  • 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 60 digital LON®bus sensors are evaluated (TOX 914 LON®, LCTR 404 LON®)
  • 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
  • Five alarm thresholds per sensor, independently adjustable from 10 to 90% of the measuring range
  • Averaging from 1 to 60 minutes possible, 2 levels (fan areas) can be displayed
  • 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,
CO carbon monoxide
NO2 nitrogen dioxide
NO nitrogen monoxide
CH4 methane
physikalische Einheit beliebig einstellbar,

Technical data

Sensors digital LON® 60 sensors in a four-wire system
Power supply 100-240V 50/60Hz,
optional 24Vdc
max. power consumption 60VA
Operating conditions -25°C...+45°C
0%...95% rel. humidity
Protection class due to housing
(DIN EN 60529)
IP 54
Dimensions (WxHxD) 300 x 230 x 120 mm
Displays Graphic LCD display
128 x 64 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 2 alarm levels with max
17 relays
per 1 relay
Malfunction, power failure,
14 alarm relays
Potential-free change-over
Switching capacity max 250V/8A
Expansion possibility up to
a total of 6 alarm levels
other interfaces USB
Universal fieldbus (option)
Weight 2.7 kg
Service life
Buffer battery clock
Service life parameter memory

> 10 years

> 20 years
Storage conditions max. 1 year
0%...95% rel. humidity
certified according to VDI2053


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)