Indicating temperature transmitter, Type nA, field mounting

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  • No Zener barrier or galvanic isolator required for many hazardous area applications.
  • ATEX & IECEx Ex nA, nL and tD certification
  • ATEX & IECEx galvanically isolated intrinsically safe sensor input.
  • Large 5 digit display + 31 segment bargraph
  • HART® communication
  • Transmitter and sensor diagnostics
  • Loop powered
  • IP66 enclosure with separate terminal compartment
  • Optional:
        Loop powered backlight
        External push buttons
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This HART® enabled BA474ND loop powered indicating temperature transmitter is Ex nA & tD certified which permits installation in Zones 2 and 22 gas and dust hazardous areas. The BA474ND has a certified galvanically isolated, intrinsically safe input allowing direct connection to a resistance thermometer, thermocouple, resistance or voltage source located in any gas or dust hazardous area without the need for Zener barriers or galvanic isolators, thus greatly reducing the loop cost.

The BA474ND may be configured using the internal push buttons or via HART® digital communication.

The instrument can be supplied calibrated to customers′ requirements free of charge and can be labelled to show units of measurement, tag number and application.

Other indicating temperature transmitters in our range include:


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



BA474ND Indicating temperature transmitter#
Mounting Field
Protection IP66
Display 5 digit 20mm high + 31 segment bargraph
Europe ATEX
    Sensor input
II 3GD, Ex nA nL [ia] IIC T5
Ex tD [iaD] A22 IP66 T80°C
-20°C ≤ Ta ≤ +60°C
II (1) G [ia] IIC T5
II (1) D [iaD]
International IECEx
    Sensor input
Ex nA nL [ia] IIC T5
Ex tD [iaD] A22 IP66 T80°C
-20°C ≤ Ta ≤ +60°C
[ia] IIC T5
Alarms Yes
Backlight - loop powered Yes
External push buttons Yes



Datasheet PDF logodownload
ATEX certificate PDF logodownload
IECEx certificate PDF logodownload
HART® certificate PDF logodownload
Ingress certificate PDF logodownload
Instruction manual PDF logodownload
Application guide PDF logodownload
BA47X/67X Indicating Temperature
Transmitter HART® Interface Guide
PDF logodownload
Declaration of Conformity PDF logodownload
HART® device files ZIP logodownload
CAD files ZIP logodownload

# Shown with optional loop powered backlight.

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