IoTKey® Ex for wireless measurements in ATEX environments.


Wireless flexibility for industrial measurements with a LoRa multi-function transmitter.


  • XD EXD models for one transmitter applications
    ATEX certificate EESF 18 ATEX 029X
    ATEX rating for gas: II 2 G Ex db ib mb IIC T6 Gb,
    ATEX rating for dust: II 2 D Ex tb ib mb IIIC T85°C Db.
  • GUB EXD models for up to four transmitter applications
    ATEX certificate EESF 18 ATEX 030X
    ATEX rating for gas: II 2 G Ex db ib mb IIC T6/T5 Gb,
    ATEX rating for dust: II 2 D Ex tb ib mb IIIC T85°C/T100°C Db.


  • Reliable long range and low power wireless data communication
  • Cost-efficient, fast and simple option for wired installations
  • For stand-alone measurements and integrated solutions
  • Easy to scale up with new sensors and locations
  • Battery and external power supply options.

Application examples

  • Preventive maintenance and problem diagnostics for heat exchangers, pumps, fans, bearings, gears, etc.
  • Remote monitoring for container levels and process temperatures
  • Environmental measurements and monitoring of air, water, soil, etc.
  • Mobile measuring sets for temporary condition monitoring of machines and production facilities.

IoTKey® WLT 310 Ex has one to four wireless LoRa (Long Range Radio) transmitters assembled in an Ex db/tb enclosure, designed for industrial hazardous applications and capable of sending data over extremely long ranges. The WLT 310 transmitter is a LoRaWAN CertifiedCM product.

The smart transmitter’s application parameters are configurable Over-the-Air (OTA) and it continuously measures process values. It is a low-energy transmitter with a battery life of several years, the LoRa technology can be used with zero operating costs, and no 3G/4G network is needed.

  • Inputs: Pt100, Pt1000, thermocouples, 0-10 VDC and 0/4-20 mA
  • All connections must be accomplished according to manufacturer instructions and ATEX regulations!
  • Power supply: Lithium battery 3.6 VDC or 12/24 VDC
  • LoRa transmission technology has typically several km range outdoors, and the signal also transmits well indoors and even below ground
  • Freely configurable OTA measurement intervals and alarms
  • Environmental temperature range with auxiliary voltage: -40...+60 °C, with battery: -25...+60 °C, depending on the battery type.

 Other IoTKey® products:


IoTKey® Gateway

IoTKey® Portal


What is LoRaWAN®?

LoRa is the acronym for Long Range Radio. Thus, a LoRaWAN® is an LPWAN (Low Power Wide Area Network) specification designed for wireless, battery-operated “Things” (devices) in regional, national or global networks – as part of the Internet of Things (IoT). LoRaWAN® targets key requirements of the IoT, such as seamless interoperability among smart Things, without the need for complex local installations. It gives users, developers and companies the freedom to expand the IoT.

Read more: LoRa Alliance® web site: www.lora-alliance.org »

IoTKey® is a registered trademark of Lapp Automaatio Oy.

IoTKey® Transmitter WLT 310 is a LoRaWAN CertifiedCM product. Lapp Automaatio Oy is a LoRa Alliance® Member.

LoRa Alliance®, LoRa Allicance® Member, LoRaWAN®, and LoRaWAN CertifiedCM are marks used under license from the LoRa Alliance®.

Technical data


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