High Level Switch – Top Mount (HLT)

Instant Wireless Alarm Notification for Spill Prevention.

  • 1 or 2 actuation points (high/high-high)
  • Switch of desired length sold separately
  • 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® High Level Switch Transmitter provide two actuation points for detecting high and high-high liquid level conditions. The Transmitter can also report transition counts. This top tank mount Transmitter is designed for use with an OleumTech high level switch. The switch is sold separately so that users can select the desired length and choose single or dual actuation option. The HLT 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 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 HLT 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 HLT communicates with an OleumTech Wireless Gateway within its network, creating a highly scalable network, accommodating virtually any I/O requirement.