Indicating temperature transmitter, Type nA, field mounting

Loop powered indicating temperature transmitter


  • To be discontinued, ATEX Ex nA certification will be de-harmonised in 2022.
  • No Zener barrier or galvanic isolator required for many hazardous area applications.
  • Ex nA, nL and tD certification
  • 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:
  • Alarms
    Loop powered backlight
    External push buttons
IECEx logoEX logo

Product details
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.

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

Model BA474ND
BA474ND #
Mounting Field
Protection IP66
Display 5 digit 20mm high + 31 segment bargraph
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
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]
Alarms Yes
Backlight - loop powered
External push buttons

Mounting &
Downloads BA474ND
Datasheet PDFDownload
IECEx certificate PDFDownload
ATEX certificate PDFDownload
HART® certificate
Ingress certificate
Instruction manual PDFDownload
BA47X/67X Indicating Temperature
Transmitter HART® Interface Guide
Declaration of Conformity (EU)
HART® device files
CAD files PDFDownload

# Shown with optional loop powered backlight.