LLHT Glass Tip

SST’s LLHT Series Glass Tip Liquid Level Switches are engineered for harsh industrial environments, providing reliable liquid level detection in applications exposed to aggressive chemicals, high pressures, and elevated temperatures. Featuring a robust stainless steel housing and a durable Simex crystal glass sensing tip, these industrial optical liquid level sensors deliver consistent performance under extreme conditions.

The LLHT sensors utilize solid-state infrared optics, with an internal LED and phototransistor optically coupled when in air. When the sensing tip is immersed in liquid, the infrared light refracts, triggering the sensor output. These switches can detect oil- and water-based liquids, remaining immune to ambient light, foam, and small bubbles, making them ideal for industrial fluid monitoring and automation systems.

Output options include N- or P-type configurations, capable of sourcing or sinking up to 200mA, operating within a 12–28VDC supply range. The output can be configured to switch high or low in either wet or dry conditions, with visual LED indication for real-time feedback.

Rated for pressures up to 80 bar and available in standard (-40°C to +100°C) or extended (-40°C to +140°C) temperature ranges, the LLHT Series offers a robust, high-precision solution for chemical-resistant, high-pressure liquid level monitoring in the most demanding industrial applications.