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Sentry Level-Lenz Sight Level Indicator

Part #
Sentry Level-Lenz
Model #

The Sentry Level-Lenz sight level indicator allows operators to visually monitor and confirm the level of liquid within a low-emission closed-loop sampling process, without disrupting the process. These indicators are safety tested to 150% of the rated pressure to assure safe, dependable service.

The Level-Lenz sight level indicator has threaded process connections, two viewing windows, and a body of 316 stainless steel. It features two double windows, one on the front and one on the side. Through the side window, the operator can flash light to enhance liquid level visibility, which can be viewed through either window. The Level-Lenz sight level indicator can be used for hydrocarbon and water-based liquids.

The Level-Lenz sight level indicator offers a simple and safe method to view liquid within a process, without interruption of the process. Unlike some other products on the market, it is a cost-effective, readily available solution that will not leak, assuring safety as well as the ability to obtain representative samples.


  • Available with 3/8-inch NPT threaded connections
  • Hydrostatically tested to 150% of rated pressure
  • One-piece 316 stainless steel body construction
  • Dual-window sight glasses allow leak-free observation of fluid levels
More Information
Process Connections 3/8 in FNTP
Max Process Pressure 2000 psig (138 barg)
Process Temperature -20°F to 400°F (-29°C to 205°C)
Particle Size 0.06 in
Wetted Materials 316/316L SS body, PTFE float ball, soda lime silica glass sight glass
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