High Level Switch – Side Mount (HLS)

Instant Wireless Alarm Notification for Spill Prevention.

  • Single actuation high level switch
  • Side tank mountable switch included
  • Over 7-year battery life
  • Self-contained, rugged design
  • Class I, Division 1 (Zone 0), intrinsically safe
  • -40 ˚C to 70 ˚C / -40 ˚F to 158 ˚F
  • 900 MHz: Up to 7500 ft (2.3 km)
  • 2.4 GHz: Up to 4.3 miles (7 km)
  • Secure AES encryption


The OleumTech® HLS High Level Switch Transmitter is a side tank mounting solution for detecting high liquid level conditions. The HLS Transmitter can also report transition counts. The HLS includes the side mountable switch and float, making it a complete ready-to-deploy solution. The HLS utilizes on-delay exception reporting method and users can set the debounce filter ranging from 20 ms to 2000 ms to control just when the high level detection occurs. As a safety measure, regardless of state change, this device reports to the Gateway every five minutes. The High Level Switch Transmitter requires no wiring. The switch simply attaches to the wiring terminal port in its junction box housing.


The HLS Transmitter relies on power from a replaceable battery. The system is engineered to achieve maximum battery life, providing +7 years of life from a single battery.


Designed for use in Class I, Division 1 (Zone 0) hazardous locations. The HLS is intrinsically safe, meaning it cannot a cause a spark and can be serviced without being removed from a process.


The High Level Switch Transmitter is configured using BreeZ Software by OleumTech, provided free of charge.


The HLS communicates with an OleumTech Wireless Gateway within its network, creating a highly scalable network, accommodating virtually any I/O requirement.