Overview
The Dahl L100 Bubble-Tube Level System is a self-contained instrument designed for precise liquid level measurement in open tanks. It is particularly suitable for hazardous, corrosive, or high-temperature liquids due to its design, which limits contact to only the stationary dip tube and purge gas.

Features

• Solid-state design ensuring high accuracy and stability.
• Overpressure safety factor rated at four times the full scale.
• Visual purge rate indication and blow-down capability.
• Compatible with various analog instrumentation for local and remote monitoring.
• NEMA 4X enclosures available for enhanced protection.

Principles of Operation
The system measures liquid levels by determining the pressure needed to force gas into the liquid beneath the surface. A pressure regulator and constant-flow regulator maintain a consistent flow of air or gas, balancing the fluid pressure at the bubble pipe's end. The P200 pressure transducer converts this pressure into an electrical signal proportional to the liquid level.

Specifications

• Measurement ranges from 0-50 inches water to 0-115 feet water.
• Gas input regulated between 1.0 to 7.0 SCFH.
• Electrical input using P200: 10-42 VDC.
• Accuracy of ±0.25% of span guaranteed.
• Operating temperature range: 30°F to 161°F.
• Environmental protection: NEMA 4X and explosion-proof design.

Applications

• Standard bubble-tube configuration for high accuracy and stability.
• Remote sensing to eliminate errors from purge flow changes.
• Automatic blow-down for periodic cleaning of the bubble tube.

Ordering Information
Systems can be ordered with various configurations, including basic, remote sensing, and automatic blow-down options. NEMA 4X enclosures and digital readouts are available as additional options.

Warranty
Products are warranted for eighteen months against defects in materials and workmanship, with liability limited to repair, refund, or replacement.