Indicating temperature transmitter, Intrinsically safe, field mounting

Loop powered indicating temperature transmitter


  • Intrinsic safety certification
  • 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 logoFM logo

Product details
This second generation BA474D loop powered indicating temperature transmitter provides a large, easy to read, digital temperature display plus accurate 4/20mA analogue and HART® digital outputs. Optional alarm outputs enable under and over temperature warnings to be generated and an optional display backlight enhances display visibility in poor lighting conditions.

The transmitter has a resistance thermometer, thermocouple, resistance or voltage input and may be configured using the internal push buttons or via HART® digital communication.

The BA474D is intrinsically safe, when protected via a Zener barrier or galvanic isolator it may be installed in any gas or dust hazardous area.

The BA474D transmitter is also certified as associated apparatus, when the transmitter is installed in a safe area the input may be directly connected to an RTD, THC, resistance or voltage source located in any gas or dust hazardous area without the need for a certified Zener barrier or galvanic isolater, thus significantly reducing the loop cost.

The transmitter 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 BA474D
BA474D #
Mounting Field
Protection IP66
Display 5 digit 20mm high + 31 segment bargraph
International IECEx
Ga Ex ia IIC T5
[Ex iaGa] IIC (associated apparatus)
-40°C ≤ Ta ≤ +70°C
(operating temperature -20°C)
Europe ATEX II 1G Ga Ex ia IIC T5
II (1) G, [Ex ia] IIC (associated apparatus)
-40°C ≤ Ta ≤ +70°C
(operating temperature -20°C)
Alarms Yes
Backlight - loop powered
External push buttons
USA FM certification
Entity CL I, II, III Div. 1
Gp A, B, C, D, E, F & G
T4 Ta = 70°C
Nonincendive CL I, II, III Div. 2
Gp A, B, C, D, E, F & G
T4 Ta = 70°C
Canada cFM certification
Entity CL I, II, III Div. 1
Gp A, B, C, D, E, F & G
T4 Ta = 70°C
IPA CL I, II, III Div. 2
Gp A, B, C, D, E, F & G
T4 Ta = 70°C
International IECEx Dust certification
Ex ia IIIC T80°C IP66 Da
(Ex ia Da) IIIC -20°C ≤ Ta ≤ +60°C
Europe ATEX Dust certification
II 1D Ex iaD 20 T80°C IP66
II (1) D (Ex ia D) -20°C ≤ Ta ≤ +60°C

Mounting &
Downloads BA474D
Datasheet PDFDownload
IECEx certificate PDFDownload
ATEX certificate PDFDownload
FM certificate
cFM certificate
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.