Electrolab’s High-Level Probe offers a single- or dual-point float switch for either high- or low-level detection in liquid tanks. The unit mounts vertically through a female NPT port on top of the tank . The size requirements for this port vary depending on the material used for the probe, fiberglass (left) or stainless steel (right). The top-mount versions are available with an optional high-level test fixture to test the operation of the high-level float without opening a tank hatch.


A side mount version  is available upon request for stainless steel tubes. An adjustable mounting grip provides for ease of installation.


The High-Level Probe can be built to custom lengths. The float activates and maintains the output until the level returns to normal. No power is needed, as the device runs off a dry contact.


Available with optional integration for wireless communications.


No adverse effects from electro-mechanical interference, tank turbulence, or other environmental variables

UL Certified, Intrinsically Safe

Stainless steel parts treated with e9 Treatments antiparaffin treatment for minimal maintenance

Discrete circuits for easy electrical installation


This consistently accurate and reliable sensor is not affected by electro-mechanical interference, tank turbulence or other environmental variables. After installation, Electrolab’s High-Level Probe is ready to monitor your tank levels.

Ongoing maintenance is practically non-existent—especially, with e9 Treatments patented Pro Series Metal Treatment. This hydrophobic and oleophobic coating significantly reduces paraffin buildup on steel instrumentation and eliminates the issue of floats sticking and impacting measurement accuracy. Cleaning of the High-Level Probe is rarely necessary.

Typical applications for the High Level Probe include:

  • High-level detection in oil and saltwater tanks

  • Control points for pumps

  • Liquid detection in containment areas

  • Low-level leak detection