DCC - Model BLM-12259 - Bubbler Level Monitor - Brochure

The Bubbler Level Monitor (BLM) model 12259 is an automatic bubbler type level measurement and display unit that periodically samples the level of most liquids. It operates by forcing compressed air into a bubbler tube with its opening placed near the bottom of the liquid. The BLM measures the pressure required to force air through the tube and generates a 4-20 mA signal which is proportional to the depth of the liquid in addition to displaying the sampled level. The pressure in the bubbler tube is also monitored to detect significant changes in liquid level which may happen between samples. If a change is detected then a new sample is initiated to update the measured level. The unit uses field configurable software that is menu-driven to allow users to change the unit’s sampling rate, offset, span, and level alarms without additional programming.