L100 Bubble Tube Liquid Level System
L100 Bubble Tube Liquid Level System
Precision Transmission of Liquid Level in Open Tanks
The Dahl L100 Bubble-Tube Level System is a fully self contained instrument, requiring only connections to air or gas supply, dip tube and electrical power source to provide precise level indication. Because only the stationary dip tube and the purge gas come in contact with the liquid, this system is ideal for applications involving hazardous locations or liquids which are highly corrosive, viscous, hot, (molten metal), explosive, slurry type or floodstuff. In addition, the electronic output from the L100 is compatible with almost all analog instrumentation, including local and remotely-located indicators, computers, data loggers, recorders and controllers.
Specifications
| Ranges |
0-50 inches water to 0-115 feet water or equivalent, full scale |
|
Gas Input |
1.0 to 7.0 SCFH, regulated on-board to a pressure between 120% or 3 psi, whichever is greater, and 200% of full scale liquid head. Maximum blow-down pressure is 150 psi. Maximum on-board regulated pressure is 60 psi |
|
Electrical Input |
Using P200: 10-42 VDC |
|
Electrical Output |
P200: 2 wire, 4-20mA into 700Ħ at 24 VDC or 2 wire, 10-50mA into 280Ħ at 24 VDC |
|
Accuracy |
±0.25% of span guaranteed; ±0.20% of span typical. Includes combined effects of linearity, hysteresis and repeatability errors. |
|
Sensitivity |
±0.02% of span guaranteed |
|
Repeatability |
±0.10% of span max; ±0.05% of span typical |
| Operating Temperature |
30°F to 161°F |
|
Thermal Sensitivity |
Span: 0.007% of span per °F guaranteed |
|
RFI/EMI Effect |
Meets or exceeds SAMA PMC 33.1, 1978, 2-abc: 0.1% of span at 10 volts/meter |
|
Environmental |
P/I is NEMA 4X and explosion proof, standard. Entire plate assembly fits in an optional NEMA 4X enclosure for further protection. |
|
Available Options |
NEMA 4X enclosure with or without digital readout, remote analog readout, auto purge |
Ordering Information
The following ordering codes are sufficient to specify a complete bubble-tube system with the exception of the P/I transducer. The P/I transducer must be ordered separately. Please refer to ControlAir's specifications for the Dahl P200 P/I Transducer.
Assemblies
| Ordering Code | Description |
| L100 | Basic bubble-tube system |
| L100R | Basic system with remote pressure sensing |
| L100A | Basic system with automatic blow-down |
| L100AR | Basic system with remote pressure sensing and automatic blow-down |
For a NEMA 4X Enclosure, add suffix E to end of part number. For a 4X enclosure with window and digital readout, add suffex EW to end of part number. Example: L100RE.
Ranges
| Ordering Code | Description |
| L11 | 0-50" WC to 0-166" WC, specify |
| L12 | 0-167" WC to 0-498" WC, specify |
| L13 | 0-499" WC to 0-830" WC, specify |
| L14 | 0-831" WC to 0-1384" WC, specify |
Options
| Ordering Code | Description |
| L22 | Digital readout, scaled for range* |
*Analog readout available as P200 option P27 When ordering, it is necessary to specify the model number, range and all options in the following manner:
|
L100REW + L12
System with remote sensing in NEMA 4X enclosure with window and digital readout |
+
|
Range, specify
0-322” WC |
The P/I transducer must be ordered separately. Please refer to ControlAir’s specifications for the ControlAir P200 P/I Transducer.