Ex transmitters for sensor head
Ex transmitters for sensor head installation

2-wire Ex transmitters for sensor head installation are presented in the selection table below. The manufacturer of these transmitters is PR electronics. Detailed product data and safety notes for each type is available by clicking the type number.
Type | Ex-data, designation | Input | Output |
---|---|---|---|
5331A | Ex II 3G Ex nA [ic] IIC T4..T6 Gc Ex II 3G Ex ic IIC T4..T6 Gc Ex II 3D Ex ic IIIC Dc Programmable 2-wire temperature transmitter | RTD, TC, mV, R | 2-wire output |
5331D | Ex II 1G Ex ia IIC T4..T6 Ga Ex II 1D Ex ia IIIC Da Ex I M1 Ex ia I Ma Programmable 2-wire temperature transmitter | RTD, TC, mV, R | 2-wire output |
5332A | Ex II 3G Ex nA [ic] IIC T4..T6 Gc Ex II 3G Ex ic IIC T4..T6 Gc Ex II 3D Ex ic IIIC Dc Programmable 2-wire temperature transmitter | RTD, R | 2-wire output |
5332D | Ex II 1G Ex ia IIC T4..T6 Ga Ex II 1D Ex ia IIIC Da Ex I M1 Ex ia I Ma Programmable 2-wire temperature transmitter | RTD, R | 2-wire output |
5333A | Ex II 3G Ex nA [ic] IIC T4..T6 Gc Ex II 3G Ex ic IIC T4..T6 Gc Ex II 3D Ex ic IIIC Dc Programmable 2-wire temperature transmitter | Pt100, Ni100, R | 2-wire output |
5333D | Ex II 1G Ex ia IIC T4..T6 Ga Ex II 1D Ex ia IIIC Da Ex II 1M Ex ia I Ma Programmable 2-wire temperature transmitter | Pt100, Ni100, R | 2-wire output |
5334A | Ex II 3G Ex nA [ic] IIC T4..T6 Gc Ex II 3G Ex ic IIC T4..T6 Gc Ex II 3D Ex ic IIIC Dc Programmable 2-wire temperature transmitter | TC, mV | 2-wire output |
5334B | Ex II 1G ia IIC T4..T6 Ga Ex II 1D ia IIIC Da Ex I M1 ia I Ma Programmable 2-wire temperature transmitter | TC, mV | 2-wire output |
5335A | Ex II 3G Ex nA [ic] IIC T6/T4 Gc Ex II 3G Ex ic IIC T6/T4 Gc Ex II 3D Ex ic IIIC Dc Programmable 2-wire temperature transmitter | RTD, TC, mV, R | HART®5, 2-wire output, more details below |
5335D | Ex II 1G Ex ia IIC T6/T4 Ga Ex II 1D Ex ia IIIC Da Ex I M1 Ex ia I Ma Programmable 2-wire temperature transmitter | RTD, TC, mV, R | HART®5, 2-wire output, more details below |
5337A | Ex II 3G Ex nA [ic] IIC T6/T4 Gc Ex II 3G Ex ic IIC T6/T4 Gc Ex II 3D Ex ic IIIC Dc Programmable 2-wire temperature transmitter | RTD, TC, mV, R | HART®7 or HART®5, 2-wire output, more details below |
5337D | Ex II 1G Ex ia IIC T6/T4 Ga Ex II 1D Ex ia IIIC Da Ex I M1 Ex ia I Ma Programmable 2-wire temperature transmitter | RTD, TC, mV, R | HART®7 or HART®5, 2-wire output, more details below |
5350A | Ex II 3GD Ex nA[nL] IIC T4..T6 or Ex II 3GD Ex nL IIC T4..T6 or Ex II 3GD Ex nA[ic] IIC T4..T6 or Ex II 3GD Ex ic IIC T4..T6 Digital temperature transmitter | RTD, TC, mV, R, pot | Profibus® PA, FOUNDATION™Fieldbus H1, more details below |
5350B | Ex II 1G Ex ia IIC T4..T6 or Ex II 2(1)G Ex ib [ia] IIC T4..T6 or Ex II 1D Ex iaD Digital temperature transmitter | RTD, TC, mV, R, pot | Profibus® PA, FOUNDATION™Fieldbus H1, more details below |
5437A | Ex II 3G Ex nA IIC T6..T4 Gc Ex II 3G Ex ec IIC T6..T4 Gc Ex II 3G Ex ic IIC T6..T4 Gc Ex II 3D Ex ic IIIC Dc Programmable 2-wire temperature transmitter | RTD, TC, mV, R, pot | HART®7 or HART®5, 2-wire output, more details below |
5437B/D | Ex II 1G Ex ia IIC T6..T4 Ga Ex II 2(1) G Ex ib [ia Ga] IIC T6..T4 Gb Ex II 1 D Ex ia IIIC Da Ex I M1 Ex ia I Ma Programmable 2-wire temperature transmitter | RTD, TC, mV, R, pot | HART®7 or HART®5, 2-wire output, more details below |
For further information on Ex markings, please download the poster Guide to Hazardous Locations.

2-wire transmitters with HART® connection
PR 5335
is a small, 1 channel transmitter for sensor head installation, input can be: RTD, TC, linear resistance or mV. HART® communication with HART®5 protocol.
- 5335A - standard version for safe area or Ex zones 2 or 22
- 5335D - ATEX, FM and IECEx certified for Ex zones 0, 1, 2, 20, 21 or 22.
PR 5337
is a small, 1 channel transmitter for sensor head installation, input can be: RTD, TC, linear resistance or mV. HART® communication by user selectable HART®5 or HART®7 protocols. When using PReset software, version 6.04 or later should be used.
- 5337A - standard version for safe area or Ex zones 2 or 22
- 5337D - ATEX, FM, IECEx and EAC-Ex certified for Ex zones 0, 1, 2, 20, 21 or 22.
- HART certificate: HART® Registered PR 5337 »
PR 5437
is a small transmitter with single or true dual inputs with sensor redundancy and drift detection for sensor head installation, input can be: RTD, TC, potentiometer, linear resistance or bipolar mV. HART® communication with HART®7 protocol. Full assessment to IEC61508 : 2010 for use in SIL 2/3 applications. When using PReset software, version 8.02.1006 or later should be used.
- 5437A - standard (safe area)
- 5437D - ATEX, FM, IECEx and EAC-Ex certified Ex-version
- HART certificate: HART® Registered PR 5437 »
HART® files: HART® bus files - DD & AMS, EDD and DTM - can be downloaded from page:prelectronics.com > Download > Software > Files for bus communication
Profibus® PA process bus connection
PRetop 5350
is a small, 1 channel, FISCO-certified digital transmitter for sensor head installation. Input can be RTD or TC sensor.
- 5350A - standard version for safe area or Ex zones 2 or 22
- 5350B - ATEX, FM, CSA, IECEx, EAC-Ex, NEPSI and INMETRO certified for Ex zones 0, 1, 2, 20, 21 or 22.
Profibus® files - GSD and PDM - can be downloaded from page:
www.prelectronics.com > Download > Software > Files for bus communication
You can use the same transmitter also in FOUNDATION™ Fieldbus H1 process bus. Transmitter detects automatically which bus it is connected to (patented AutoSwitch function), and adapts its features according to that bus.
FOUNDATION™ Fieldbus H1 process bus connection
PRetop 5350
is a small, 1 channel, FISCO-certified digital transmitter for sensor head installation. Input can be: RTD or TC sensor.
- 5350A - standard version for safe area or Ex zones 2 or 22
- 5350B - ATEX, FM, CSA, IECEx, EAC-Ex, NEPSI and INMETRO certified for Ex zones 0, 1, 2, 20, 21 or 22.
LAS function block: transmitter can be programmed to take over the bus segment communication control if connection to master is lost.
PID function block: process control can be decentralized down to transmitter level.
H1 bus files - DD and DTM - can be downloaded from page: prelectronics.com > Download > Software > Files for bus communication
You can use the same transmitter also in Profibus® PA process bus. Transmitter detects automatically which bus it is connected to (patented AutoSwitch function), and adapts its features according to that bus.