IoTKey® transmitter for preventive maintenance.
EPIC® SENSORS is the choice of professionals!

Wireless LoRa transmitter


  • Configurable, energy efficient LoRa 868 MHz (EU) transmitter for industrial grade wireless measuring and IoT systems using LoRaWAN® protocol
  • Three configurable sensor inputs
  • Self adjusting transmit power
  • Battery or external power supply
  • Self diagnostics including battery monitoring
  • Configurable measurement intervals and alarm limits.

Typical industry sectors

  • Manufacturing
  • Energy
  • Water & Infrastructure.

Application examples

  • Problem diagnostics and preventive maintenance for bearings, pumps, gears, turbines, etc.
  • Detection of efficiency drops and maintenance needs in heat exchangers
  • Advanced and continuous oil quality monitoring for product maintenance, life cycle and cost optimization
  • Environmental measurements and monitoring for warehouses and storage areas, laboratory space, etc.
  • Remote monitoring for levels and temperatures in water supply and waste water networks
  • Monitoring and improving energy efficiency in district heating systems
  • Mobile measuring sets for temporary condition monitoring of machines and production facilities. 

IoTKey® WLT 310 is a wireless LoRa (Long Range Radio) transmitter designed for various industrial applications and capable of sending data over extremely long ranges. The WLT 310 is a LoRa Alliance Certified™ 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, humidity sensor, 0-10 VDC and 0/4-20 mA
  • Power supply: Lithium battery 3.6 VDC or 12/24 VDC
  • LoRa transmission technology has typically 10+ km range outdoors, and the signal also transmits well indoors and even below ground
  • Freely configurable OTA measurement intervals and alarms
  • Environmental temperature range –40...+80 °C, depending on the battery type.

What is LoRa?

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

Weight39 g
Height25 mm
Diameter57 mm
Wire size1 x 1.0 mm2 stranded wire 
Compliance standards: 
EMCEN 61326-1:2013 and EN 301489
RFEN 300 220-1 v2.4.1
VibrationEN 60068-2-6
LoRaWAN certified

Connection examples

Assembly examples

Example: the WLT 310 transmitter with external antenna attached to a EPIC® SENSORS temperature sensor, which is equipped with a high top connection head to provide a sufficient battery compartment.


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