Timer or Clock, Ex nA, field mounting

Ex logo


  • ATEX, IECEx, ETL and cETL Ex nA & Ex tc certification allows installation in Zone 2 and 22 without Zener barriers or galvanic isolators.
  • Proximity detector, open collector, magnetic pick-off, voltage pulse, or switch contact input.
  • Two separate displays
  • Two inputs
  • Isolated status output
  • Optional:
        Internally powered display backlight
        Isolated dual Control Outputs
        Stainless steel legend plate
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This versatile Ex nA and Ex tc certified Timer or Clock can perform a host of timing and control functions, such as sampling or dosing, within a Zone 2 or 22 hazardous area without the need for Zener barriers or galvanic isolators, thus significantly reducing cost. An easy to use state and event structure enables relatively complex timing functions to be easily configured. Timing operations may be started and stopped via the inputs, or from the front panel buttons. The instrument display shows progress of the operation and international certification permits worldwide installation.

An internally powered backlight is available as a factory fitted accessory.

Instruments can be supplied configured and fitted with a customer specified printed scale card showing the units of time for no additional charge. An optional stainless steel legend plate is also available which can be supplied laser engraved with customer specified tag and application information.

Other timers or clocks in our range include:


To select options for your application please refer to the following table.



BA374NG Timer or clock#
Mounting Field 122 x 120mm
Protection IP66
Display 8 digits 18mm high
and 6 digits 12mm high
No. of inputs 2
Certification     Ex ic certification codes only refer to the instrument push button contacts which are nonincendive.
Europe ATEX Group II Category 3GD
Ex nA ic IIC T5 Gc
Ex ic tc IIIC T80°C Dc
-40°C ≤ Ta ≤ +60°C
USA ETL Class I Zone 2 AEx nA ic IIC T5 Gc
Zone 22 AEx ic tc IIIC T80°C Dc
-40°C ≤ Ta ≤ 60°C
Canada cETL Ex nA ic IIC T5 Gc
Ex n IIC T5 Gc
Ex ic tc IIIC T80°C Dc
Class III Div 2 Class II Div 2 Gp F, G
-40°C ≤ Ta ≤ 60°C
International IECEx Ex nA ic IIC T5 Gc
Ex ic tc IIIC T80°C Dc
-40°C ≤ Ta ≤ +60°C
Backlight Yes
Control output Yes



Datasheet PDF logodownload
ATEX certificate PDF logodownload
ETL & cETL certificate PDF logodownload
IECEx certificate PDF logodownload
Ingress certificate PDF logodownload
Instruction manual PDF logodownload
Declaration of Conformity PDF logodownload
CAD files ZIP logodownload

# Shown with optional separately powered backlight.

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