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Brand: Trafag
Trafag EXNT 8292 Ex Pressure Transmitter
Description
Thin-film Ex ia pressure transmitter with hydrogen-compatible option
The Trafag EXNT 8292 is an intrinsically safe pressure transmitter based on Trafag thin-film-on-steel sensor technology. Trafag describes it as offering long-term stability and accurate pressure measurement over a wide temperature range, and certifies it to ATEX, IECEx and UKEX for gas Zones 0, 1 and 2, dust Zones 20, 21 and 22 and mining.
It gives a 4 to 20 mA output on a 10 to 30 VDC supply. A hydrogen-compatible sensor version is available, and the EC79/2009 type approval from the German KBA is listed for hydrogen applications on selected connections.
Technical specifications of the EXNT 8292
| Parameter | Specification |
|---|---|
| Manufacturer | Trafag AG, Switzerland |
| Product code | 8292 |
| Measuring principle | Thin-film-on-steel |
| Measuring range | From 0 … 0.4 bar; ranges in bar and psi per datasheet table |
| Output signal | 4 … 20 mA, 24 (10 … 30) VDC |
| Type of protection | II 1G Ex ia IIC T4/T6 Ga; I M1 Ex ia I Ma; II 1/2G Ex ia IIC T4/T6 Ga/Gb |
| Approvals | ATEX, IECEx, UKEX, DNV, KRS, RMRS, PESO; EC79/2009 on request |
| Accuracy at 25 °C | 0.3 % FS or 0.5 % FS typical, by sensor code |
| Media / ambient temperature | Maximum -40 to +120 °C, depending on electrical connection |
| Protection | Minimum IP65; IP67 with cable or connection code 02 |
| Vibration / shock | 10 g (50 to 2000 Hz) / 50 g, 3 ms |
| Internal inductance / capacitance | Li below 10 µH; Ci 23 nF or less |
| Wetted sensor | 1.4542 (AISI 630); hydrogen-compatible steel option |
| Pressure connection | 1.4542 up to 16 bar; 1.4404 above 16 bar |
| Housing | 1.4301 (AISI 304) |
| Seals | FKM or EPDM |
| Mounting torque | 25 Nm; 30 Nm for connection code 29 |
The accuracy table in the datasheet gives a total error band over minus 25 to plus 85 degrees C of 2.0 percent FS for the 0.5 percent sensors and 0.5 percent FS for the 0.3 percent sensors, with a one-year long-term stability of 0.2 percent FS. These figures help when comparing the transmitter against a loop accuracy budget rather than only the headline accuracy at 25 degrees C.
Standard types and ordering
Trafag lists standard products with short lead times, with type codes such as EXNT0.4A, EXNT1.0A, EXNT10.0A, EXNT25.0A, EXNT100.0A and EXNT250.0A, each with a 0.5 percent accuracy, a G1/4 male connection and a DIN 43650-A plug. A 0 to 10 bar standard unit has an overpressure rating of 20 bar.
Other connections include G1/4 and G1/2 male and manometer threads, R1/4, 1/4 NPT and M18x1.5. Electrical options include DIN 43650-A, M12x1, MIL-C 26482 and Binder 723 plugs and shielded cable, with accessories for peak-damping elements, seals and a Zener barrier code ZEN28VDC rated 28 V and 93 mA.
Selecting and installing the transmitter
Check the electrical connection code before fixing the maximum media and ambient temperature, because Trafag ties the temperature limits to the connection type. For Zone 0 use, follow the marking for the metal connector versions and the guidance in the datasheet on plastic connectors, which are marked for Zone 1.
Pair the transmitter with a certified barrier or isolator, check the entity parameters against the Li and Ci values, and keep the 25 Nm mounting torque. For hydrogen service, ask for the hydrogen-compatible version and the matching connection code.
Documents and quotation
The attached document is the Trafag EXNT 8292 Ex pressure transmitter datasheet (H72329ae, 07/2026). Trafag also publishes instructions, certificates and an accessories datasheet separately.
Send the type code or pressure range, connection, plug, accuracy class and any hydrogen requirement when requesting a quotation. See Pressure Instrumentation for related instruments.
Datasheets & Documents
- Datasheet Trafag EXNT 8292 Ex Pressure Transmitter datasheet (H72329ae) Download
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About brand
Trafag is a Swiss manufacturer of sensors and monitoring devices for pressure, temperature and SF6 gas density, founded in 1942 and based in Bubikon, Switzerland. Its pressure transmitters, pressure switches, temperature transmitters and thermostats are used wherever robust field instruments are needed, including shipbuilding, hydraulics, railways, large engines, water treatment and test benches.
Instruments for hazardous areas
For explosive atmospheres Trafag offers an Ex range that includes intrinsically safe pressure transmitters, submersible level probes, flameproof pressostats and Ex industrial thermostats, with ATEX, IECEx and UKEX certification depending on the model. These instruments suit oil and gas, chemical and marine installations where gas or dust zones must be respected.
Technology and range
The product range spans piezoresistive and thin-film-on-steel pressure sensors, electromechanical and electronic pressure switches, level sensors, temperature gauges, thermostats and accessories such as damping elements. Trafag publishes a datasheet, instructions and certificates for each product family, so zone, accuracy and connection data can be checked before ordering.
Sourcing through Seven Star LLC
Seven Star LLC supplies Trafag instruments to customers in Oman and the GCC and quotes against the model code, range and approval required.
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Frequently Asked Questions
Which zones does the EXNT 8292 cover?
Gas Zones 0, 1 and 2, dust Zones 20, 21 and 22 and mining, under ATEX, IECEx and UKEX certification.
Is a hydrogen version available?
Yes. Trafag offers a hydrogen-compatible sensor option and lists EC79/2009 certification by the German KBA.
What is the output signal?
4 to 20 mA on a 10 to 30 VDC supply.
What technology does the sensor use?
Trafag thin-film-on-steel sensor technology.
What accuracy classes exist?
Typical accuracy at 25 degrees C is 0.3 or 0.5 percent FS, depending on the sensor code.
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